• Thumbnail for Cantor's theorem
    question marks, boxes, or other symbols. In mathematical set theory, Cantor's theorem is a fundamental result which states that, for any set A {\displaystyle...
    22 KB (3,735 words) - 00:55, 8 December 2024
  • Thumbnail for Georg Cantor
    numbers and their arithmetic. Cantor's work is of great philosophical interest, a fact he was well aware of. Originally, Cantor's theory of transfinite numbers...
    85 KB (10,164 words) - 12:57, 28 May 2025
  • Thumbnail for Cantor's diagonal argument
    R. A generalized form of the diagonal argument was used by Cantor to prove Cantor's theorem: for every set S, the power set of S—that is, the set of all...
    27 KB (2,751 words) - 02:16, 12 April 2025
  • The theorem is named after Felix Bernstein and Ernst Schröder. It is also known as the Cantor–Bernstein theorem or Cantor–Schröder–Bernstein theorem, after...
    20 KB (2,374 words) - 11:57, 23 March 2025
  • In set theory, Cantor's paradox states that there is no set of all cardinalities. This is derived from the theorem that there is no greatest cardinal...
    5 KB (734 words) - 07:41, 20 November 2023
  • philosophers. Cantor's theorem implies that there are sets having cardinality greater than the infinite cardinality of the set of natural numbers. Cantor's argument...
    23 KB (2,978 words) - 04:01, 28 January 2025
  • mathematics and logic, such as Cantor's diagonal argument, Cantor's theorem, Russell's paradox, Gödel's first incompleteness theorem, Turing's solution to the...
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  • |A| ≤ |B| and |B| ≤ |A|, then |A| = |B|. This theorem does not rely on the axiom of choice. Cantor's theorem implies that no set is equinumerous to its power...
    14 KB (1,822 words) - 19:23, 26 May 2025
  • Look up Cantor's theorem in Wiktionary, the free dictionary. Cantor's theorem is a fundamental result in mathematical set theory. Cantor's theorem may also...
    1 KB (168 words) - 05:49, 3 December 2023
  • Thumbnail for Cantor's first set theory article
    Cantor's first set theory article contains Georg Cantor's first theorems of transfinite set theory, which studies infinite sets and their properties. One...
    102 KB (7,563 words) - 02:18, 14 May 2025
  • Cantor's intersection theorem refers to two closely related theorems in general topology and real analysis, named after Georg Cantor, about intersections...
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  • In order theory and model theory, branches of mathematics, Cantor's isomorphism theorem states that every two countable dense unbounded linear orders are...
    25 KB (3,035 words) - 08:06, 24 April 2025
  • Heine–Cantor theorem states that a continuous function between two metric spaces is uniformly continuous if its domain is compact. The theorem is named...
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  • class. Zermelo's paper may be the first to mention the name "Cantor's theorem". Cantor's theorem: "If M is an arbitrary set, then always M < P(M) [the power...
    15 KB (2,239 words) - 02:36, 15 January 2025
  • sets. Cantor gave two proofs that the cardinality of the set of integers is strictly smaller than that of the set of real numbers (see Cantor's first...
    32 KB (4,061 words) - 17:25, 15 April 2025
  • Burnside's lemma Cantor's theorem Cantor–Bernstein–Schroeder theorem Cayley's formula Cayley's theorem Clique problem (to do) Compactness theorem (very compact...
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  • Thumbnail for Power set
    the power set must be larger than the original set). In particular, Cantor's theorem shows that the power set of a countably infinite set is uncountably...
    21 KB (2,479 words) - 08:13, 23 April 2025
  • Thumbnail for Cardinality
    cardinality of this set (P2820) (see uses) Aleph number Beth number Cantor's paradox Cantor's theorem Countable set Counting Ordinality Pigeonhole principle "Cardinality...
    68 KB (9,230 words) - 01:26, 30 May 2025
  • \kappa } . Thus, Kőnig's theorem gives us an alternate proof of Cantor's theorem. (Historically of course Cantor's theorem was proved much earlier.)...
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  • following theorems: Cantor's diagonal argument (the earliest) Cantor's theorem Russell's paradox Diagonal lemma Gödel's first incompleteness theorem Tarski's...
    574 bytes (87 words) - 10:58, 6 August 2024
  • of all sets, provided that both exist. However, this conflicts with Cantor's theorem that the power set of any set (whether infinite or not) always has...
    10 KB (1,327 words) - 06:43, 21 May 2024
  • must satisfy the sentence saying the real numbers are uncountable. Cantor's theorem states that some sets are uncountable. This counterintuitive situation...
    22 KB (2,795 words) - 12:03, 4 October 2024
  • Thumbnail for Skolem's paradox
    Cantor proved that the real numbers were uncountable; in 1891, he proved by his diagonal argument the more general result known as Cantor's theorem:...
    28 KB (3,331 words) - 11:59, 18 March 2025
  • {P}}(A)} . A proof is given in the article Cantor's theorem. As an immediate consequence of this and the Basic Theorem above we have: Proposition—The set P...
    28 KB (4,381 words) - 01:01, 29 March 2025
  • algorithm to solve any first-order problem in Euclidean geometry. Cantor's theorem Artin, Emil (1988) [1957], Geometric Algebra, Wiley Classics Library...
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  • Thumbnail for Set theory
    Set theory (category Georg Cantor)
    This theorem is proved using Cantor's first uncountability proof, which differs from the more familiar proof using his diagonal argument. Cantor introduced...
    54 KB (6,575 words) - 12:01, 1 May 2025
  • universal set, so it must be that Cantor's theorem (in its original form) does not hold in NF. Indeed, the proof of Cantor's theorem uses the diagonalization argument...
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  • theory, for instance Cantor's paradox and the Burali-Forti paradox, and did not believe that they discredited his theory. Cantor's paradox can actually...
    35 KB (4,774 words) - 22:32, 25 May 2025
  • set P(S). Georg Cantor proved that the power set is always larger than the set, i.e., |P(S)| > |S|. A special case of Cantor's theorem is that the set...
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  • also known as a "helping theorem" or an "auxiliary theorem". In many cases, a lemma derives its importance from the theorem it aims to prove; however...
    4 KB (399 words) - 06:07, 7 May 2025