• 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...
    10 KB (1,580 words) - 15:46, 24 March 2025
  • space Kakutani fixed-point theorem Kleene fixed-point theorem Knaster–Tarski theorem Lefschetz fixed-point theorem Nielsen fixed-point theorem Poincaré–Birkhoff...
    11 KB (1,278 words) - 00:51, 3 February 2024
  • 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 f...
    61 KB (8,424 words) - 10:13, 18 March 2025
  • Thumbnail for Fixed point (mathematics)
    have a fixed point, but it doesn't describe how to find the fixed point. The Lefschetz fixed-point theorem (and the Nielsen fixed-point theorem) from algebraic...
    14 KB (1,696 words) - 09:26, 14 December 2024
  • Atiyah–Bott fixed-point theorem, proven by Michael Atiyah and Raoul Bott in the 1960s, is a general form of the Lefschetz fixed-point theorem for smooth...
    8 KB (957 words) - 15:29, 5 February 2024
  • in 1925 and the American Philosophical Society in 1929. The Lefschetz fixed-point theorem, now a basic result of topology, was developed by him in papers...
    14 KB (1,213 words) - 12:29, 20 January 2025
  • Holomorphic Lefschetz formula is an analogue for complex manifolds of the Lefschetz fixed-point formula that relates a sum over the fixed points of a...
    1 KB (157 words) - 00:13, 18 August 2021
  • Thumbnail for Barycentric subdivision
    instance in Lefschetz's fixed-point theorem. The Lefschetz number is a useful tool to find out whether a continuous function admits fixed-points. This...
    16 KB (2,533 words) - 18:25, 13 April 2025
  • Thumbnail for Hairy ball theorem
    algebraic topology, using the Lefschetz fixed-point theorem. Since the Betti numbers of a 2-sphere are 1, 0, 1, 0, 0, ... the Lefschetz number (total trace on...
    14 KB (1,809 words) - 14:12, 23 April 2025
  • Thumbnail for Triangulation (topology)
    instance in Lefschetz's fixed-point theorem. The Lefschetz number is a useful tool to find out whether a continuous function admits fixed-points. This...
    33 KB (5,150 words) - 14:50, 22 February 2025
  • zero when f has no fixed points, the Lefschetz–Hopf theorem trivially implies the Lefschetz fixed-point theorem. A. Katok and B. Hasselblatt(1995), Introduction...
    2 KB (341 words) - 01:18, 22 October 2024
  • introduced by Solomon Lefschetz (1926), at the same time introducing relative homology, for application to the Lefschetz fixed-point theorem. There are now numerous...
    3 KB (395 words) - 20:11, 12 September 2024
  • Grothendieck trace formula, an analogue in algebraic geometry of the Lefschetz fixed-point theorem in algebraic topology, used to express the Hasse–Weil zeta function...
    900 bytes (148 words) - 06:23, 1 April 2023
  • (algebraic topology) Lefschetz fixed-point theorem (fixed points, algebraic topology) Lefschetz–Hopf theorem (topology) Leray–Hirsch theorem (algebraic topology)...
    78 KB (6,289 words) - 04:18, 18 March 2025
  • generalizations of the Lefschetz fixed-point theorem, with terms coming from fixed-point submanifolds of the group G. See also: equivariant index theorem. Atiyah (1976)...
    53 KB (7,553 words) - 10:43, 28 March 2025
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    function with the diagonal may be computed using homology via the Lefschetz fixed-point theorem; the self-intersection of the diagonal is the special case of...
    10 KB (1,333 words) - 11:18, 13 February 2025
  • Thumbnail for Nonlinear functional analysis
    infinite-dimensional spaces, topological degree theory, Jordan separation theorem, Lefschetz fixed-point theorem) Morse theory and Lusternik–Schnirelmann category theory...
    1 KB (87 words) - 07:18, 13 May 2024
  • Thumbnail for Algebraic topology
    theorem Freudenthal suspension theorem Hurewicz theorem Künneth theorem Lefschetz fixed-point theorem Leray–Hirsch theorem Poincaré duality theorem Seifert–van...
    19 KB (2,093 words) - 02:29, 23 April 2025
  • known as the Nielsen fixed-point theorem: Any map f has at least N(f) fixed points. Because of its definition in terms of the fixed-point index, the Nielsen...
    3 KB (375 words) - 12:04, 26 July 2024
  • Applications Jordan curve theorem Brouwer fixed point theorem Invariance of domain Lefschetz fixed-point theorem Hairy ball theorem Degree of a continuous...
    4 KB (311 words) - 12:17, 30 October 2023
  • occurs in the derivation of a probability density function; Lefschetz fixed-point theorem, where a telescoping sum arises in algebraic topology; Homology...
    10 KB (1,866 words) - 21:18, 14 April 2025
  • Thumbnail for Raoul Bott
    fixed-point theorem', a combination of the Riemann–Roch theorem and Lefschetz fixed-point theorem (it is named after Woods Hole, Massachusetts, the site...
    15 KB (1,380 words) - 22:26, 7 January 2025
  • characteristic of the circle (real projective line) is 0, and thus the Lefschetz fixed-point theorem says only that it must fix at least 0 points, but possibly more...
    70 KB (10,603 words) - 05:07, 10 April 2025
  • Grothendieck trace formula is an analogue in algebraic geometry of the Lefschetz fixed-point theorem in algebraic topology. One application of the Grothendieck trace...
    4 KB (640 words) - 01:09, 12 April 2025
  • Thumbnail for Michael Atiyah
    his work in developing K-theory, a generalized Lefschetz fixed-point theorem and the Atiyah–Singer theorem, for which he also won the Abel Prize jointly...
    83 KB (8,817 words) - 21:12, 15 April 2025
  • and to prove general results such as Poincaré duality and the Lefschetz fixed-point theorem in this context. Grothendieck originally developed étale cohomology...
    33 KB (5,016 words) - 00:24, 9 January 2025
  • {\displaystyle \operatorname {fix} (\varphi )} is finite, then by the Lefschetz fixed-point theorem, | fix ⁡ ( φ ) | = 1 − 2 tr ⁡ ( h ( φ ) ) + 1 = 2 − 2 tr ⁡ (...
    18 KB (2,791 words) - 17:45, 16 December 2024
  • Thumbnail for Poincaré–Hopf theorem
    mappings with finitely many fixed points is Lefschetz-Hopf theorem. Since every vector field induce flow on manifold and fixed points of small flows corresponds...
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  • algebraic geometry, a branch of mathematics, the Lefschetz theorem on (1,1)-classes, named after Solomon Lefschetz, is a classical statement relating holomorphic...
    6 KB (778 words) - 15:41, 16 December 2024
  • Weil conjectures (category Theorems in number theory)
    fit into well-known patterns relating to Betti numbers, the Lefschetz fixed-point theorem and so on. The analogy with topology suggested that a new homological...
    50 KB (7,942 words) - 20:24, 24 March 2025