• Brouwer's fixed-point theorem is a fixed-point theorem in topology, named after L. E. J. (Bertus) Brouwer. It states that for any continuous function...
    61 KB (8,376 words) - 00:56, 20 June 2024
  • Banach fixed-point theorem Bekić's theorem Borel fixed-point theorem Bourbaki–Witt theorem Browder fixed-point theorem Brouwer fixed-point theorem Rothe's...
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  • a fixed point, i.e. a point which is mapped to a set containing it. The Kakutani fixed point theorem is a generalization of the Brouwer fixed point theorem...
    25 KB (3,237 words) - 13:30, 28 September 2024
  • The Schauder fixed-point theorem is an extension of the Brouwer fixed-point theorem to topological vector spaces, which may be of infinite dimension. It...
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  • Thumbnail for Jordan curve theorem
    theorem can be proved from the Brouwer fixed point theorem (in 2 dimensions), and the Brouwer fixed point theorem can be proved from the Hex theorem:...
    27 KB (3,282 words) - 02:32, 8 October 2024
  • Thumbnail for Fixed point (mathematics)
    guaranteeing that, if it is satisfied, fixed-point iteration will always converge to a fixed point. The Brouwer fixed-point theorem (1911) says that any continuous...
    13 KB (1,679 words) - 10:23, 18 September 2024
  • Thumbnail for L. E. J. Brouwer
    in his career, Brouwer proved a number of theorems in the emerging field of topology. The most important were his fixed point theorem, the topological...
    19 KB (2,148 words) - 05:39, 4 October 2024
  • In mathematics, the Lefschetz fixed-point theorem is a formula that counts the fixed points of a continuous mapping from a compact topological space X...
    9 KB (1,549 words) - 18:54, 1 November 2024
  • the Banach fixed-point theorem (also known as the contraction mapping theorem or contractive mapping theorem or Banach–Caccioppoli theorem) is an important...
    16 KB (2,668 words) - 07:21, 16 September 2024
  • In mathematics, a number of fixed-point theorems in infinite-dimensional spaces generalise the Brouwer fixed-point theorem. They have applications, for...
    3 KB (427 words) - 14:37, 7 June 2024
  • The theorem and its proof are due to L. E. J. Brouwer, published in 1912. The proof uses tools of algebraic topology, notably the Brouwer fixed point theorem...
    8 KB (1,079 words) - 03:01, 22 July 2024
  • Kakutani fixed-point theorem in his 1950 paper to prove existence of equilibria. His 1951 paper used the simpler Brouwer fixed-point theorem for the same...
    59 KB (8,758 words) - 08:30, 24 October 2024
  • the Brouwer fixed-point theorem: that is, f {\displaystyle f} is continuous and maps the unit d-cube to itself. The Brouwer fixed-point theorem guarantees...
    25 KB (3,881 words) - 23:29, 29 July 2024
  • has the fixed-point property by the Brouwer fixed-point theorem. A retract A of a space X with the fixed-point property also has the fixed-point property...
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  • Jordy Brouwer (b. 1988), Dutch footballer L. E. J. Brouwer (1881–1966), Dutch mathematician and philosopher Brouwer fixed-point theorem, Brouwer–Heyting–Kolmogorov...
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  • mathematics, the Caristi fixed-point theorem (also known as the Caristi–Kirk fixed-point theorem) generalizes the Banach fixed-point theorem for maps of a complete...
    4 KB (432 words) - 06:09, 24 February 2023
  • by the Brouwer fixed-point theorem, every compact bounded convex set in a Euclidean space is a fixed-point space. The definition of a fixed-point space...
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  • be proved from Sperner's lemma and can be used to prove the Brouwer fixed-point theorem. Let Δ n − 1 {\displaystyle \Delta _{n-1}} be an ( n − 1 ) {\displaystyle...
    15 KB (2,396 words) - 20:54, 11 September 2023
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    Sperner's lemma (category Fixed-point theorems)
    combinatorial result on colorings of triangulations, analogous to the Brouwer fixed point theorem, which is equivalent to it. It states that every Sperner coloring...
    30 KB (4,087 words) - 22:28, 28 August 2024
  • Thumbnail for Hairy ball theorem
    theorem was first proved by Henri Poincaré for the 2-sphere in 1885, and extended to higher even dimensions in 1912 by Luitzen Egbertus Jan Brouwer....
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  • Thumbnail for Intermediate value theorem
    topology. The Brouwer fixed-point theorem is a related theorem that, in one dimension, gives a special case of the intermediate value theorem. In constructive...
    26 KB (4,312 words) - 21:08, 29 September 2024
  • Thumbnail for Emanuel Sperner
    VI (1928) 265–272. Park, Sehie (1999). "Ninety Years of the Brouwer Fixed Point Theorem" (PDF). Vietnam Journal of Mathematics. 27 (3): 187–222. CiteSeerX 10...
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    proof by John von Neumann. Von Neumann's original proof used the Brouwer fixed-point theorem on continuous mappings into compact convex sets, which became...
    140 KB (15,578 words) - 02:19, 30 October 2024
  • equivalent to the Brouwer fixed-point theorem.: 545  It is sometimes called the Miranda theorem or the Bolzano–Poincaré–Miranda theorem. The picture on the...
    6 KB (725 words) - 12:09, 23 October 2024
  • the theorem. A toy theorem of the Brouwer fixed-point theorem is obtained by restricting the dimension to one. In this case, the Brouwer fixed-point theorem...
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  • Thumbnail for Degree of a continuous mapping
    defined by Brouwer, who showed that the degree is homotopy invariant (invariant among homotopies), and used it to prove the Brouwer fixed point theorem. In modern...
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  • diverges Banach fixed-point theorem Banach–Tarski paradox Basel problem Bolzano–Weierstrass theorem Brouwer fixed-point theorem Buckingham π theorem (proof in...
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  • Thumbnail for Arrow–Debreu model
    fulfilling Walras’s Law is equivalent to Brouwer fixed-Point theorem. Thus, the use of Brouwer's fixed-point theorem is essential for showing that the equilibrium...
    58 KB (9,258 words) - 10:47, 18 July 2024
  • Thumbnail for Borsuk–Ulam theorem
    Borsuk–Ulam theorem states that every continuous function from an n-sphere into Euclidean n-space maps some pair of antipodal points to the same point. Here...
    14 KB (2,431 words) - 17:06, 27 June 2024
  • Thumbnail for Hex (board game)
    Hex (board game) (category Theorems in topology)
    also has profound mathematical underpinnings related to the Brouwer fixed-point theorem, matroids and graph connectivity. The game was first published...
    34 KB (4,402 words) - 18:12, 4 October 2024