Fact-checked by Grok 2 weeks ago

Mathematical folklore

Mathematical folklore refers to the body of theorems, definitions, proofs, facts, techniques, and cultural expressions—such as jokes, slang, proverbs, and anecdotes—that circulate among mathematicians primarily through , , conferences, and informal communications rather than formal publication in books or journals. This unwritten knowledge forms a vital part of the mathematical community's shared heritage, often encompassing results that are widely accepted as true but lack a traceable, rigorous written proof, distinguishing it from mere rumor through communal verification over time. A significant aspect of mathematical folklore involves unpublished or "folk" theorems, which are intuitive results known within subfields but not fully documented, sometimes hindering progress until formalized. For instance, in and , concepts like the cobordism hypothesis circulated as folklore for years before receiving detailed proofs, reflecting how such knowledge evolves through seminars and collaborations. These elements often emerge in specialized areas, where proofs may be sketched in talks or emails but remain unpublished due to perceived obviousness or priority to other work, yet they influence research directions profoundly. Efforts like the User's Guide Project aim to document this folklore through peer-reviewed repositories to preserve and validate it. Beyond technical results, mathematical folklore includes the humorous and social dimensions that reinforce group identity among mathematicians, treated as a distinct folk group with esoteric traditions accessible mainly to insiders. This encompasses puns on concepts like the (e.g., ""), limericks about absent-minded professors such as , and slang terms like "trivial" for non-obvious proofs, transmitted via lists, websites, and photocopies. Such humor often highlights tensions between abstract and practical applications, as in jokes contrasting mathematicians with engineers, and serves to alleviate anxieties about rigor while fostering camaraderie. Examples include the Banach-Tarski paradox inspiring paradoxical grape jokes or proverbs underscoring proof's elusiveness, all contributing to the playful yet profound culture of . Mathematical folklore also intersects with broader ethnomathematical traditions, where folk puzzles and problems rooted in cultural contexts—such as tangrams, the , or the —reflect historical mathematical thinking and aid education by promoting creativity and problem-solving. These elements, passed down across generations, underscore folklore's role in bridging professional and everyday , ensuring that intuitive insights and narratives endure despite the discipline's emphasis on written formality.

Definition and Scope

Cultural Folklore

Cultural folklore in refers to the apocryphal tales, proverbs, and jokes that circulate informally within the mathematical community, encapsulating its cultural norms, values, and stereotypes without reliance on formal publication or verification. These elements often highlight the human side of , such as the quirks of famous mathematicians or the shared frustrations of problem-solving, serving to humanize abstract pursuits and reinforce a sense of belonging among practitioners. Unlike documented historical accounts, this thrives on and embellishment, preserving the profession's collective memory through narrative rather than rigorous evidence. A defining characteristic of mathematical cultural is its mode of transmission, primarily oral and interpersonal, occurring at conferences, in classrooms, or through casual word-of-mouth exchanges among colleagues and students. This dissemination fosters community identity by creating insider references that ease the introduction of complex ideas, making esoteric concepts more relatable through humorous or cautionary anecdotes. For instance, such stories are frequently shared during seminars to lighten the atmosphere or illustrate ethical dilemmas in research, thereby strengthening interpersonal bonds and perpetuating the field's unwritten social codes. Transmission extends beyond live interactions into written forms that capture oral traditions, as seen in mathematician biographies like G. H. Hardy's (1940), which weaves anecdotal reflections on creativity, regret, and the aesthetics of to convey the emotional landscape of the discipline. These accounts, drawn from personal experiences, exemplify how bridges individual insights with broader cultural narratives, often without explicit sourcing. By embedding such tales in accessible texts, they gain semi-permanence while retaining the fluidity of spoken lore. In contrast to folklore, which encompasses informal like undocumented theorems, cultural folklore emphasizes the human and social dimensions, focusing on personalities, motivations, and communal rituals rather than substantive content. Folk theorems, for example, represent a distinct category of unproven but widely accepted results, separate from these narrative traditions. This separation underscores cultural folklore's role in shaping the profession's ethos, prioritizing relational and interpretive elements over analytical ones.

Technical Folklore

Technical folklore in encompasses "folk theorems," which are mathematical results widely accepted within specialist communities despite lacking formal or rigorous proof in the . These are typically known through informal channels such as lectures, talks, or communications, where proofs may be sketched but not fully detailed. The term draws from broader notions of as passed orally, adapted here to denote theorems that gain authority through repeated use and verification among experts, often exhibiting characteristics like anonymous origins, widespread popularity, and relative age within the field. Such results often emerge from collaborative discussions in environments, where ideas are shared and refined collectively before formalization. Over time, many theorems are eventually published in later works, providing the missing proofs or elaborations, though some persist as "ghost theorems" with untraceable origins. However, this informal status carries risks, including potential errors that go unverified due to reliance on oral transmission, as well as barriers to for newcomers who may struggle to reconstruct or confirm the results independently. The phenomenon of technical folklore became prominent in 20th-century mathematical communities, particularly in dynamic fields like and . The term "folk theorem" gained prominence in the late 20th century, with examples appearing in mathematical writing from the 1960s onward, particularly in algebraic contexts. For instance, in , certain results hold folklore status, as evidenced by the 1998 exercise book by Grigore Călugăreanu and P. Hamburg, which compiles 346 problems described as drawing from the "folklore of ring theory," reflecting oral and unpublished traditions in the field.

Cultural Elements

Stories and Anecdotes

One of the most enduring anecdotes in mathematical folklore is the story of Carl Friedrich Gauss's childhood demonstration of prodigious talent. Around 1784, at the age of seven, while attending elementary school in , , Gauss was tasked by his teacher J.G. Büttner with summing the integers from 1 to 100 as a time-consuming exercise to occupy the class. Instead of computing sequentially, Gauss quickly recognized the arithmetic series and paired the terms (1 with 100, 2 with 99, and so on) to yield 50 pairs each summing to 101, resulting in a total of $50 \times 101 = 5050, or equivalently using the \frac{n(n+1)}{2} for n=100. His assistant, Martin Bartels, verified the result and alerted the teacher, who was astonished by the boy's insight. Though the core event is widely accepted as historical, details have been mythologized over time, with some accounts suggesting the teacher assigned the task to quiet the class, potentially prompting Gauss's clever response rather than it being entirely spontaneous. Another celebrated tale involves the Indian mathematician and his collaboration with in . In 1918, while Ramanujan was recovering from illness in a nursing home, Hardy visited and mentioned arriving by taxicab number , which he described as rather dull. Ramanujan immediately countered that it was a fascinating number, being the smallest expressible as the sum of two positive cubes in two distinct ways: $1^3 + 12^3 = 9^3 + 10^3 = 1729. Hardy later recounted the exchange in detail, noting Ramanujan's reply: "No, Hardy! No, Hardy! It is a very interesting number; it is the smallest number expressible as a sum of two cubes in two different ways." This anecdote, drawn from Hardy's personal reminiscences, underscores Ramanujan's intuitive grasp of number theory even in frailty, and 1729 has since been termed the Hardy-Ramanujan number or in mathematical lore. The tragic legend of centers on his final hours before a fatal in 1832. On the night of May 29, Galois, then 20, stayed up writing a outlining key ideas in what would become , including proofs and annotations on permutations and solvability of equations. He scribbled notes in the margins, one famously reading, "There is something to complete in this demonstration. I do not have the time," reflecting his awareness of impending death. The the next day with Perscheux d'Herbinville, possibly over a romantic rivalry involving Stéphanie-Félicie Poterin du Motel, resulted in Galois being mortally wounded; he died on June 2. While the 's existence and content are verified through later publications, the romanticized image of Galois feverishly documenting his revolutionary work amid personal peril has been exaggerated in retellings to emphasize his genius cut short. A foundational myth in mathematical history is the story of Isaac Newton's inspiration for the law of universal gravitation. In 1666, during his retreat to amid the Great Plague, Newton purportedly observed an apple falling from a tree, prompting him to ponder why it descended straight to rather than deviating, leading to his insights on extending to the Moon and celestial bodies. This tale first appeared in print not from Newton himself but from , who in 1727-1734 related it based on accounts from Newton's niece, Catherine Conduitt, claiming the incident occurred under a specific tree at Woolsthorpe. Newton alluded to similar thoughts in his later writings but never mentioned the apple explicitly, suggesting the anecdote embellishes his reflective process during that . These stories, while often blending fact with embellishment, play a vital in mathematical folklore by humanizing abstract concepts and the figures behind them, making the discipline more relatable and inspiring to students and enthusiasts. They illustrate themes of sudden insight and perseverance, encouraging appreciation for as a human endeavor, though their inaccuracies—such as potential prompts in Gauss's case—remind us to approach them critically.

Sayings and Proverbs

Mathematical sayings and proverbs often distill core philosophies, methodological heuristics, or community stereotypes into memorable phrases, serving as shorthand wisdom passed among practitioners. These expressions highlight the rigor, creativity, and interdisciplinary tensions inherent in mathematical culture, evolving from ancient retorts to modern adaptations that reflect changing professional dynamics. One of the earliest recorded mathematical proverbs is attributed to around 300 BCE, who reportedly responded to I's inquiry for a simpler path to with the declaration, "There is no to geometry." This anecdote, preserved in ' fifth-century commentary on Euclid's Elements, underscores the discipline's demand for foundational rigor over expediency, rejecting any shortcut to mastery. In the nineteenth century, encapsulated his constructivist philosophy in the 1886 statement, "God made the integers; all else is the work of man" (original German: "Die ganzen Zahlen hat der liebe Gott gemacht, alles andere ist Menschenwerk"), critiquing the invention of non-integer entities like irrational numbers in . Recorded in Heinrich Weber's Lehrbuch der Algebra (1895), the proverb reflects Kronecker's emphasis on integers as natural and divinely ordained, contrasting with the human fabrication of continuous mathematics. G.H. Hardy articulated an aesthetic criterion for mathematical value in his 1940 essay , asserting, "Beauty is the first test: there is no permanent place in the world for ugly ." This prioritizes theorems' elegance over practical utility, influencing generations of pure mathematicians to value aesthetic appeal as a primary measure of worth. Field-specific proverbs guide problem-solving heuristics; in , "Differentiate under the sign" advises introducing a into an and differentiating with respect to it to simplify evaluation, a technique rooted in Leibniz's rule but popularized as a versatile trick for definite integrals. In algebra and , "Reduce modulo p" serves as a proverbial strategy to simplify equations or structures by considering them over finite fields modulo a prime p, often revealing patterns or contradictions unattainable in the original setting. These sayings evolve with mathematical culture; a modern variant twists Newton's seventeenth-century of standing on giants' shoulders into "Physicists stand on mathematicians' shoulders," humorously acknowledging the foundational role of in physical theories while inverting the original humility.

Jokes and Humor

Mathematical humor frequently employs puns, riddles, and satirical observations that exploit mathematical concepts, professional stereotypes, or paradoxical thinking to entertain practitioners and enthusiasts. These jokes often require familiarity with specific or conventions to appreciate the wit, serving as a lighthearted way to reflect on the discipline's quirks and challenges. Collections of such humor have been compiled since the , with Andrej and Elena Cherkaev's online archive at the categorizing entries by themes like definitions, theorems, and references to , providing a repository of that captures the community's playful side. A well-known pun plays on number bases and calendar abbreviations: "Why do mathematicians confuse Halloween and Christmas? Oct 31 = Dec 25." Here, "Oct" refers to both and (base 8), while "Dec" denotes both December and (base 10); converting 31 from octal to decimal yields 25, equating the dates numerically. This riddle highlights how mathematicians might interpret everyday language through a technical lens, turning a simple holiday mix-up into a clever trick. Riddles about illustrate equivalence under continuous deformation: "A topologist can't tell the difference between a coffee mug and a ." The humor arises from the idea that both objects share the same topological properties, such as a single hole, making them indistinguishable in that abstract framework—a staple example used to introduce the subject. Satirical tales often target across related fields. One such contrasts pure and applied mathematicians with physicists: "Real mathematicians can prove it, but can't compute it; applied mathematicians can compute it, but can't prove it; physicists can do neither but approximate it." This exaggerates the perceived strengths and limitations of each group, poking fun at the divide between theoretical rigor, practical calculation, and empirical shortcuts in scientific problem-solving. Lightbulb jokes adapt the classic format to mock problem-solving styles, with a mathematical variant stating: "How many mathematicians does it take to change a light bulb? One: they just redefine as the standard." This quip satirizes the tendency to reframe problems abstractly rather than address them directly, aligning with the discipline's emphasis on definitions and axioms.

Technical Elements

Folk Theorems

Folk theorems in refer to significant results that circulate informally among experts through seminars, workshops, and personal communications before receiving formal publication, often accompanied by intuitive proof sketches rather than rigorous write-ups. These theorems gain acceptance within the community due to their repeated invocation in subsequent work, reflecting the oral and collaborative nature of mathematical progress. While they eventually may be formalized, their initial status as underscores the role of shared intuition in advancing the field. A prominent example is the Atiyah-Singer index theorem, which relates the analytic index of elliptic operators on manifolds to topological invariants. In the 1960s, the theorem was discussed in topology seminars, including a 1965 series at the Institute for Advanced Study organized by and , where intuitive geometric arguments were shared orally among participants. These discussions predated the formal publication of the complete proof in 1968, allowing the result to influence research through pre-publication circulation. Another instance arises in algebraic combinatorics with the Combinatorial Nullstellensatz, a result asserting that under certain degree conditions, a multivariate over a cannot vanish on the entire Cartesian product of finite sets larger than the degrees of its variables. provided a formal proof and applications in 1999, unifying earlier ideas using the polynomial method in . In , particularly stable homotopy groups, various conjectures and results qualify as , representing collective knowledge without a single originating source. For example, certain structural properties of the stable homotopy category, such as equivalences involving loop spaces or sequences, have been intuitively understood and referenced in proofs for decades through workshop exchanges, though formal expositions remain sparse. This body of informal results highlights the field's reliance on communal verification. Such folk theorems typically emerge in intensive workshops or seminars, where mathematicians test ideas through sketches and counterexamples, leading to widespread acceptance via their integration into other proofs without immediate publication. This process fosters rapid dissemination but often culminates in formalization when a key contributor compiles the arguments, sometimes with reviews like those in explicitly labeling the result as prior folklore. However, reliance on folk theorems carries risks, including overlooked gaps or unproven edge cases in early intuitive versions, which may propagate errors if not rigorously checked later. Historical analyses of proof reliability emphasize that informal circulation, while innovative, demands eventual scrutiny to ensure .

Unpublished Techniques and Results

Unpublished techniques and results in mathematical folklore encompass practical methods, partial lemmas, and heuristics that circulate informally among mathematicians, often without formal publication or attribution, yet prove invaluable in research and problem-solving. These differ from fully articulated folk theorems by their fragmentary nature—serving as procedural tools or "tricks" rather than complete propositions—and are typically shared through seminars, notes, and preprints rather than peer-reviewed journals. A classic example from is differentiation under the sign, a for evaluating challenging by introducing a and differentiating with respect to it. Consider an of the form I(x) = \int_a^b f(x, t) \, dt; under appropriate and differentiability conditions on f, one may interchange the derivative and to yield \frac{d}{dx} I(x) = \int_a^b \frac{\partial}{\partial x} f(x, t) \, dt. This technique simplifies computations by transforming the original into a more tractable , often solved by initial conditions or boundary values. Known in specialized forms since the through works like G. H. Hardy's notes, it remained largely unpublished as a general heuristic until George Pólya's systematic presentation in his 1954 treatise, which drew from earlier informal traditions. In , reducing Diophantine equations modulo primes serves as a foundational trick to assess local solvability before pursuing global solutions. For an equation F(x_1, \dots, x_n) = 0 over the s, one first examines its behavior in the \mathbb{F}_p for various primes p, determining whether solutions exist p; if not for some p, no solutions are possible. This approach, rooted in oral traditions from and geometry seminars, facilitates early obstructions via Hasse invariants or solubility criteria in s. Ring theory provides instances where unpublished partial results underpin exercise collections, such as variants of the Artin-Wedderburn decomposition theorem. In Grigore Călugăreanu and Peter Hamburg's 1998 volume, numerous exercises explore decompositions of semisimple rings into rings over rings. These variants address non-standard assumptions like idempotent lifting or structures. Such techniques propagate primarily through blackboard expositions in conferences and preliminary preprints, functioning as essential toolbox items that enable progress on specific problems without requiring a polished, standalone proof. In modern practice, they continue to disseminate via comments on preprints and collaborative discussions, often labeled as "folklore tricks" to acknowledge their untraceable origins.

Historical Development and Collections

Origins in Mathematical Tradition

The origins of mathematical folklore can be traced back to ancient traditions where mathematical knowledge was often guarded as sacred or esoteric, particularly within the around 500 BCE. The , a secretive community founded by in , bound their members by oaths to keep discoveries confidential, viewing numbers as mystical elements underlying the . This secrecy fostered early through myths surrounding breakthroughs that challenged their rational worldview, such as the discovery of the of √2. Legend holds that of , a Pythagorean, revealed this result—demonstrating that the diagonal of a cannot be expressed as a ratio of integers—and was punished by drowning at sea, either by or expulsion by the group, symbolizing the tension between hidden knowledge and public revelation. During the , mathematical anecdotes began circulating informally among scholars, blending personal experiences with emerging ideas, as seen in Gerolamo Cardano's work on probability in the . Cardano, an , composed Liber de Ludo Aleae around 1525, drawing from his observations to outline concepts like and the , which prefigured formal . This manuscript remained unpublished until 1663 but was shared in manuscript form among contemporaries, contributing to anecdotal traditions in games of chance before the landmark 1654 correspondence between and established probability as a rigorous field. Such informal dissemination highlighted how personal narratives and unpublished treatises shaped early modern mathematical lore. The saw mathematical folklore expand with the professionalization of , as private correspondences among leading figures preserved unpublished insights shared among peers. , often called the "prince of mathematicians," frequently included novel results in his letters to colleagues in the early 1800s, discussing topics like and astronomy without immediate publication. These exchanges, later compiled posthumously, reveal a culture of selective disclosure where breakthroughs circulated verbally or in writing among trusted networks, influencing peers' work while delaying formal dissemination; for instance, Gauss's diary and letters contained hundreds of such "folklore" entries that only surfaced decades after his death in 1855. In the , particularly post-World War II, mathematical folklore proliferated through informal gatherings and , as exemplified by the Bourbaki collective. Formed in the 1930s by French mathematicians like and , the Bourbaki group held secretive seminars and "congresses" in the 1940s and 1950s, producing internal notes that blended technical insights with humorous anecdotes, fostering a structuralist approach to . These unpublished minutes and newsletters captured evolving ideas on and , influencing the broader community's informal traditions before their integration into seminal texts like . This evolution transitioned into modern contexts via sustained personal interactions, such as the correspondence between and from 1913 onward, which bridged European and Indian mathematical traditions. Hardy's letters to the self-taught Ramanujan critiqued and refined intuitive results from Indian folklore-inspired methods, like those rooted in Vedic approximations and infinite series, helping integrate them into rigorous analysis and inspiring a legacy of cross-cultural anecdotal exchange.

Notable Compilations and Sources

One of the earliest dedicated collections of mathematical folklore is Steven G. Krantz's Mathematical Apocrypha: Stories and Anecdotes of Mathematicians and the Mathematical, published in 2002 by the . This volume compiles urban legends, personal anecdotes, and lesser-known theorems drawn from the author's experiences and oral traditions within the mathematical community, emphasizing the human elements behind mathematical discoveries. It includes debunkings of persistent myths, such as the notion that descended into madness due to isolation in developing , revealing instead that his challenges stemmed from multiple factors including familial pressures and professional rivalries. Krantz expanded this work in Mathematical Apocrypha Redux: More Stories and Anecdotes of Mathematicians and the Mathematical in 2005, also published by the , which adds further quips, ruminations, and tales to illuminate the diverse facets of mathematical life. These books together preserve by attributing stories to their likely origins while cautioning against unsubstantiated embellishments, serving as accessible entry points for understanding the cultural undercurrents of . G. H. 's , first published in 1940 by , stands as a seminal reflection on the nature of , incorporating self-reflective anecdotes and sayings that have become part of mathematical lore. uses personal insights to defend as an aesthetic pursuit, weaving in proverbial wisdom about and the mathematician's mindset, such as his famous distinction between "real" and "useless" mathematics, which has influenced generations of reflections on the field's intrinsic value. In the digital era, the nLab's dedicated "" page, maintained since the mid-2000s as part of the online collaborative resource for and related fields, documents informal results and techniques passed down orally in the category theory community. It defines folklore as theorems widely accepted through long-standing community consensus without formal publication, providing examples like unproven but intuitive claims in that guide ongoing research. MathOverflow, a question-and-answer platform for research-level launched in 2009, hosts numerous threads since 2011 collecting and analyzing mathematical urban legends, often cross-referencing them with historical evidence. These discussions, such as the 2011 thread on "Mathematical 'urban legends,'" aggregate anecdotes like exaggerated tales of academic rivalries or serendipitous discoveries, fostering community verification and preservation of . The article "Foolproof: A Sampling of Mathematical Folk Humor" by Paul Renteln and Alan Dundes, published in the January 2005 issue of Notices of the American Mathematical Society, examines folklore through the lens of mathematical jokes and humor, drawing from anthropological perspectives to classify motifs in stories about proofs and theorems. Dundes, a prominent folklorist, co-authors this piece to highlight how such humor reflects cultural attitudes toward abstraction and rigor in mathematics. A article on The Aperiodical, titled "Mathematical myths, legends and inaccuracies: some examples," debunks specific historical myths, including the exaggerated account of ' "!" moment in the bath leading to his death, clarifying that while the insight is rooted in his work, the dramatic narrative of him running naked through Syracuse and being slain mid-drawing circles conflates separate traditions. This piece underscores the role of in popularizing while urging critical examination of embellished tales. These compilations and sources address longstanding gaps in documenting technical , such as unpublished techniques in advanced fields, and incorporate recent online discussions from platforms like MathOverflow post-2020, which continue to evolve the corpus of shared mathematical knowledge.

References

  1. [1]
    [PDF] EFFECTIVENESS OF FOLK MATHEMATICS ON ACHIEVEMENT AT ...
    Folk mathematics or mathematical folklore means theorems, definitions, proofs or mathematical facts or techniques that circulate among people by word of ...
  2. [2]
    [PDF] The User's Guide Project: Looking Back and Looking Forward
    Jan 1, 2020 · By providing a suitable open-access repository for mathematical folklore (that undergoes an intensive and collaborative peer-review process, to ...<|separator|>
  3. [3]
    folklore in nLab
    Mar 5, 2023 · A theorem is sometimes said to be folklore when the community feels that it has been around and generally accepted as true for a long time.
  4. [4]
    Foolproof: A Sampling of Mathematical Folk Humor
    And, like all folk groups, mathematicians have. their own folk speech (slang), proverbs, limericks, and jokes, among other forms of folklore.
  5. [5]
    [PDF] The Role of Mathematical Folk Puzzles in Developing ... - arXiv
    Oct 28, 2025 · Mathematical folklore, like any good folklore, always reflects both historical and cultural contexts in ... Numerous studies have demonstrated ...
  6. [6]
    [PDF] Shadows of the Truth: Metamathematics of Elementary Mathematics
    Feb 28, 2014 · mathematical folklore, the corpus of small problems, examples, brainteasers, jokes, etc., not properly documented and existing. SHADOWS OF ...
  7. [7]
    [PDF] Mathematics under the Microscope Borovik, Alexandre 2007 MIMS ...
    Sep 5, 2007 · tary units of cultural transmission and invokes the concept of ... mathematical folklore, 69, 142, 221 mathematics. “competition”, 75.
  8. [8]
    [PDF] An Annotated Mathematician's Apology
    Jan 21, 2019 · Hardy died on 1 December 1947, and so his works, including A Mathematician's Apology and. 'Mathematics in war-time', are in the public domain in ...
  9. [9]
    None
    Summary of each segment:
  10. [10]
    On folk theorems - ACM Digital Library
    "Folklore: The traditional belief, legends and. customs, current among common people". (The Oxford English Dictionary, Oxford, 1933) "7Theorem: A general ...
  11. [11]
    Two folk theorems in topological dynamics | European Journal of ...
    Feb 11, 2016 · Two folk theorems in topological dynamics. Scholarly Article; Published: 11 February 2016. Volume 2, pages 539–543, (2016) ...
  12. [12]
    Exercises in Basic Ring Theory
    ### Summary of Content from *Exercises in Basic Ring Theory*
  13. [13]
    Carl Friedrich Gauss (1777 - 1855) - Biography
    His teacher, Büttner, and his assistant, Martin Bartels, were amazed when Gauss summed the integers from 1 to 100 instantly by spotting that the sum was 50 ...Missing: anecdote source
  14. [14]
    Srinivasa Ramanujan - Biography
    ### Summary of the Taxicab Number 1729 Story with Hardy
  15. [15]
    Évariste Galois (1811 - 1832) - Biography - University of St Andrews
    ... duel not being clear but certainly linked with Stephanie. A marginal note in the margin of the manuscript that Galois wrote the night before the duel reads.Missing: evidence | Show results with:evidence
  16. [16]
    Henry Taylor on Isaac Newton - MacTutor - University of St Andrews
    ... Newton's thoughts were directed to the subject of gravity. Voltaire is the authority for the well-known anecdote about the apple. He had his information ...Missing: source | Show results with:source
  17. [17]
    History of Mathematics: Seeking Truth and Inspiring Students
    The tales of mathematics involve more than just the mathematics itself. Mathematical anecdotes are perhaps akin to family gossip, capitalizing on hu- mans' ...
  18. [18]
    Proclus and the history of geometry as far as Euclid - MacTutor
    Whereupon Euclid answered that there was no royal road to geometry. He is, then, younger than Plato's pupils and older than Eratosthenes and Archimedes, who ...Missing: source | Show results with:source
  19. [19]
    Weber's Lehrbuch der Algebra and Kronecker's Vorlesungen
    Aug 14, 2025 · God made the integers; all else is the work of man (Weber, 1893a, p. 15). The only known source attesting to the authenticity of this quote ...
  20. [20]
    [PDF] A Mathematician's Apology - Arvind Gupta
    G. H. Hardy. Page 2. First Published November 1940. As fifty or more years ... Beauty is the first test: there is no permanent place in the world for ugly ...Missing: source | Show results with:source
  21. [21]
    [PDF] Differentiation under the integral sign - Keith Conrad
    and then differentiate under the integral sign to prove. ∫. R cosx. (x2 + t2)2 dx = π(t + 1). 2t3et if t > 0. 3. From the formula. ∫ ∞. 0 e. −tx sinx x dx = π.Missing: proverb source
  22. [22]
    NTIC Another Criterion - Mathematics and Computer Science
    Now let us reduce modulo p; p ; recall the notation ra,e r a , e for the remainder of ae a e in Definition 17.2.2. This gives a congruence: ∏ ...
  23. [23]
    Math jokes collection by Andrej and Elena Cherkaev
    The suggested collection of mathematical folklore might be enjoyable for mathematicians and for students because every joke contains a portion of truth or ...
  24. [24]
    How is Halloween the same as Christmas? - EDN
    Oct 31, 2007 · Remember that the two “words” you have written before each number can be interpreted as a number base, in this case, the less common octal, and ...
  25. [25]
    When is a coffee mug a donut? Topology explains it - Phys.org
    Oct 4, 2016 · A topologist is a person who cannot tell the difference between a coffee mug and a donut—so goes a joke about a little-known scientific ...
  26. [26]
    Science Jokes:1. MATHEMATICS
    APPLIED ... Mathematicians, Take One Engineers think that equations approximate the real world. Physicists think that the real world approximates equations.<|control11|><|separator|>
  27. [27]
    Eugene Fink's collection of quotes: Screwing in a light bulb
    Existentialists: Two. One to screw it in and one to observe how the light bulb itself symbolizes a single incandescent beacon of subjective reality in a nether ...Missing: redefine | Show results with:redefine
  28. [28]
    Seminar on the Atiyah-Singer Index Theorem
    ### Summary of History of the Atiyah-Singer Index Theorem
  29. [29]
    [PDF] Combinatorial Nullstellensatz
    Combinatorial Nullstellensatz are two theorems, based on Hilbert's Nullstellensatz, with applications in Combinatorial Number Theory, Graph Theory and ...
  30. [30]
    Foundations of Stable Homotopy Theory
    There is much folklore but very few easy entry points. This comprehensive introduction to stable homotopy theory changes that. It presents the foundations ...
  31. [31]
    Why Mathematical Proof Is a Social Compact | Quanta Magazine
    and why objectivity is never quite within reach.<|control11|><|separator|>
  32. [32]
    Revisiting the reliability of published mathematical proofs - jstor
    Jun 20, 2014 · mathematical justification for the four-color theorem, meant a crucial change in traditional conceptions of proof and mathematical knowledge.
  33. [33]
    [PDF] Proofs for Folklore Theorems on the Radon-Nikodym Derivative
    Jul 9, 2025 · IN mathematics, folklore theorems refer to results that are widely accepted and frequently utilized by experts but are often not formally ...
  34. [34]
    G H Hardy's papers - University of St Andrews
    G H Hardy, Notes on some points in the integral calculus XIII: On differentiation under the integral sign (continued), Messenger of Mathematics 33 (1904), 62-67 ...
  35. [35]
    How a Secret Society Discovered Irrational Numbers
    Jun 13, 2024 · The ancient scholar Hippasus of Metapontum was punished with death for his discovery of irrational numbers—or at least that's the legend.Missing: sqrt( source
  36. [36]
  37. [37]
    Gauss, Carl Friedrich - Encyclopedia.com
    May 17, 2018 · The unpublished results appear in notes, correspondence, and reports to official bodies, which became accessible only many years later.<|separator|>
  38. [38]
    Inside the Secret Math Society Known Simply as Nicolas Bourbaki
    Nov 9, 2020 · For almost a century, the anonymous members of Nicolas Bourbaki have written books intended as pure expressions of mathematical thought.<|separator|>
  39. [39]
    Who Was Ramanujan? - Stephen Wolfram Writings
    Apr 27, 2016 · In the early part of 1913, Hardy and Ramanujan continued to exchange letters. Ramanujan described results; Hardy critiqued what Ramanujan said, ...
  40. [40]
    how GH Hardy tamed Srinivasa Ramanujan's genius | University of ...
    Apr 22, 2016 · The Cambridge mathematician worked tirelessly with the Indian genius, to tame his creativity within the then current understanding of the field.Missing: correspondence folklore
  41. [41]
    Mathematical Apocrypha: Stories and Anecdotes of Mathematicians ...
    This book contains a collection of tales about mathematicians and the mathematical, derived from the author's experience. It shares with the reader the nature ...
  42. [42]
    Mathematical apocrypha : stories and anecdotes of mathematicians ...
    Oct 24, 2011 · Krantz, Steven G. (Steven George), 1951-. Publication date: 2002. Topics: Mathematics, Science/Mathematics, General, Mathematics / General ...
  43. [43]
    Mathematical Apocrypha Redux: More Stories and Anecdotes of ...
    The purpose of the book is to explore and to celebrate the many facets of mathematical life. The stories reveal mathematicians as intense, human, and ...Missing: 2010 | Show results with:2010
  44. [44]
    Mathematical Apocrypha Redux: More Stories and Anecdotes of ...
    A companion to Mathematical Apocrypha, this second volume of anecdotes, stories, quips, and ruminations about mathematics and mathematicians is sure to please.Missing: 2010 | Show results with:2010
  45. [45]
    A Mathematician's Apology
    G. H. Hardy. Foreword by C. P. Snow. Publisher: Cambridge University Press ... This 'apology', written in 1940 as his mathematical powers were declining ...
  46. [46]
    ho.history overview - Mathematical "urban legends" - MathOverflow
    Jan 24, 2011 · Mathematical urban legends have been collected by Steven Krantz in the book, Mathematical Apochrypha (and I think there's a second volume).
  47. [47]
    Notices of the AMS January 2005 - American Mathematical Society
    Foolproof: A Sampling of Mathematical Folk Humor Paul Renteln and Alan Dundes A folklorist and a physicist analyze jokes by and about mathematicians.
  48. [48]
    Mathematical myths, legends and inaccuracies: some examples
    Oct 10, 2015 · I decided I would discuss myths and inaccuracies. Though I am aware of a few well-known examples, I was struggling to find a nice, concise debunking of one.