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  2. List of mathematical proofs - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_proofs

    Fermat's little theorem and some proofs; Gödel's completeness theorem and its original proof; Mathematical induction and a proof; Proof that 0.999... equals 1; Proof that 22/7 exceeds π; Proof that e is irrational; Proof that π is irrational; Proof that the sum of the reciprocals of the primes diverges

  3. Mathematical proof - Wikipedia

    en.wikipedia.org/wiki/Mathematical_proof

    An elementary proof is a proof which only uses basic techniques. More specifically, the term is used in number theory to refer to proofs that make no use of complex analysis . For some time it was thought that certain theorems, like the prime number theorem , could only be proved using "higher" mathematics.

  4. Jacobian conjecture - Wikipedia

    en.wikipedia.org/wiki/Jacobian_conjecture

    It was first conjectured in 1939 by Ott-Heinrich Keller, [1] and widely publicized by Shreeram Abhyankar, as an example of a difficult question in algebraic geometry that can be understood using little beyond a knowledge of calculus. The Jacobian conjecture is notorious for the large number of attempted proofs that turned out to contain subtle ...

  5. List of incomplete proofs - Wikipedia

    en.wikipedia.org/wiki/List_of_incomplete_proofs

    Italian school of algebraic geometry. Most gaps in proofs are caused either by a subtle technical oversight, or before the 20th century by a lack of precise definitions. A major exception to this is the Italian school of algebraic geometry in the first half of the 20th century, where lower standards of rigor gradually became acceptable.

  6. Proofs involving the addition of natural numbers - Wikipedia

    en.wikipedia.org/wiki/Proofs_involving_the...

    We prove associativity by first fixing natural numbers a and b and applying induction on the natural number c.. For the base case c = 0, (a + b) + 0 = a + b = a + (b + 0)Each equation follows by definition [A1]; the first with a + b, the second with b.

  7. Resolution of singularities - Wikipedia

    en.wikipedia.org/wiki/Resolution_of_singularities

    Download as PDF; Printable version; ... and an algebraic proof for all fields of characteristic 0 was given by Zariski ... (PDF), Journal of Algebra, 320 (3): ...

  8. List of conjectures - Wikipedia

    en.wikipedia.org/wiki/List_of_conjectures

    In other words, the cardinality of the set of transcendentals (denoted ) is greater than that of the set of algebraic numbers (). [ 24 ] Bernhard Riemann , at the end of his famous 1859 paper " On the Number of Primes Less Than a Given Magnitude ", stated (based on his results) that the logarithmic integral gives a somewhat too high estimate of ...

  9. Lie's third theorem - Wikipedia

    en.wikipedia.org/wiki/Lie's_third_theorem

    The classical proof is straightforward but relies on Ado's theorem, whose proof is algebraic and highly non-trivial. [2] Ado's theorem states that any finite-dimensional Lie algebra can be represented by matrices. As a consequence, integrating such algebra of matrices via the matrix exponential yields a Lie group integrating the original Lie ...