• Thumbnail for Borsuk–Ulam theorem
    In mathematics, the BorsukUlam theorem states that every continuous function from an n-sphere into Euclidean n-space maps some pair of antipodal points...
    15 KB (2,497 words) - 19:13, 14 May 2025
  • Using the BorsukUlam Theorem: Lectures on Topological Methods in Combinatorics and Geometry is a graduate-level mathematics textbook in topological combinatorics...
    5 KB (530 words) - 13:49, 16 February 2025
  • Thumbnail for Karol Borsuk
    notable mathematical concepts that bear Borsuk's name include Borsuk's conjecture, BorsukUlam theorem and Bing–Borsuk conjecture. In 1936, he married Zofia...
    11 KB (1,032 words) - 06:20, 23 May 2025
  • invariance of dimension and the BorsukUlam theorem. This gives it a place among the fundamental theorems of topology. The theorem is also used for proving deep...
    61 KB (8,516 words) - 04:02, 21 May 2025
  • Thumbnail for Radon's theorem
    simplex, gives the BorsukUlam theorem, that ƒ must map two opposite points of the sphere to the same point. The topological Radon theorem was originally...
    18 KB (2,424 words) - 10:45, 2 December 2024
  • Thumbnail for Stanisław Ulam
    proved a number of theorems and proposed several conjectures. Born into a wealthy Polish Jewish family in Lemberg, Austria-Hungary; Ulam studied mathematics...
    87 KB (8,132 words) - 16:41, 24 May 2025
  • above, although "Ulam did make a fundamental contribution in proposing" the BorsukUlam theorem. The two-dimensional variant of the theorem (also known as...
    19 KB (2,708 words) - 23:38, 18 April 2025
  • Thumbnail for Intermediate value theorem
    {\displaystyle \vert f(x)\vert <\varepsilon } . A similar result is the BorsukUlam theorem, which says that a continuous map from the n {\displaystyle n} -sphere...
    26 KB (4,360 words) - 15:59, 25 May 2025
  • Thumbnail for Necklace splitting problem
    proved by the Borsuk-Ulam theorem. When k {\displaystyle k} is an odd prime number, the proof involves a generalization of the Borsuk-Ulam theorem. When k {\displaystyle...
    12 KB (1,764 words) - 12:47, 24 April 2023
  • In mathematics, the Lusternik–Schnirelmann theorem, aka Lusternik–Schnirelmann–Borsuk theorem or LSB theorem, says as follows. If the sphere Sn is covered...
    2 KB (255 words) - 21:35, 26 January 2022
  • Thumbnail for Tverberg's theorem
    1112/jlms/s1-41.1.123 Blagojević, P. V. M.; Ziegler, G. M. (2017), "Beyond the BorsukUlam Theorem: The Topological Tverberg Story", in Loebl, M.; Nešetřil, J.; Thomas...
    9 KB (1,356 words) - 00:19, 20 May 2025
  • Thumbnail for Tucker's lemma
    Tucker's lemma (category Fixed-point theorems)
    In mathematics, Tucker's lemma is a combinatorial analog of the BorsukUlam theorem, named after Albert W. Tucker. Let T be a triangulation of the closed...
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  • Thumbnail for Algebraic topology
    Blakers–Massey theorem BorsukUlam theorem Brouwer fixed point theorem Cellular approximation theorem Dold–Thom theorem Eilenberg–Ganea theorem Eilenberg–Zilber...
    19 KB (2,093 words) - 02:29, 23 April 2025
  • language BorsukUlam theorem Erdős–Ulam problem Fermi–Pasta–Ulam–Tsingou problem Hyers–Ulam–Rassias stability Kuratowski–Ulam theorem Mazur–Ulam theorem Ulam's...
    1,003 bytes (92 words) - 18:45, 21 March 2022
  • combinatorics. Lovász's proof used the BorsukUlam theorem and this theorem retains a prominent role in this new field. This theorem has many equivalent versions...
    5 KB (476 words) - 10:58, 19 August 2024
  • Bolzano–Weierstrass theorem (real analysis, calculus) BorsukUlam theorem (topology) Brouwer fixed-point theorem (topology) Cantor's intersection theorem (real analysis)...
    78 KB (6,293 words) - 12:16, 2 May 2025
  • theorem Brouwer fixed point theorem Invariance of domain Lefschetz fixed-point theorem Hairy ball theorem Degree of a continuous mapping BorsukUlam theorem...
    4 KB (311 words) - 12:17, 30 October 2023
  • Nerve complex (redirect from Nerve theorem)
    ISBN / Date incompatibility (help) Matoušek, Jiří (2007). Using the Borsuk-Ulam Theorem: Lectures on Topological Methods in Combinatorics and Geometry (2nd ed...
    10 KB (1,643 words) - 13:00, 12 April 2025
  • This is a direct corollary of the Hobby–Rice theorem. It can also be proved using the Borsuk-Ulam theorem: Every partition of an interval using n {\displaystyle...
    42 KB (5,997 words) - 07:40, 4 April 2025
  • Thumbnail for Suspension (topology)
    ISBN 0-521-79160-X and ISBN 0-521-79540-0 Matoušek, Jiří (2007). Using the Borsuk-Ulam Theorem: Lectures on Topological Methods in Combinatorics and Geometry (2nd ed...
    7 KB (1,246 words) - 10:51, 1 April 2025
  • any symmetry possessed by both spaces. A famous theorem of equivariant topology is the BorsukUlam theorem, which asserts that every Z 2 {\displaystyle \mathbf...
    6 KB (934 words) - 18:41, 11 April 2025
  • Thumbnail for Borsuk's conjecture
    subsets are not enough in general. The proof is based on the BorsukUlam theorem. That led Borsuk to a general question: Die folgende Frage bleibt offen: Lässt...
    14 KB (1,511 words) - 02:29, 24 January 2025
  • Thumbnail for Hole
    p. 58. ISBN 978-0-48627576-5. Matoušek, Jiří (2007). Using the Borsuk-Ulam Theorem: Lectures on Topological Methods in Combinatorics and Geometry (2nd ed...
    23 KB (2,849 words) - 19:05, 13 April 2025
  • Thumbnail for Antipodal point
    emanating from the centre, and these two points are antipodal. The BorsukUlam theorem is a result from algebraic topology dealing with such pairs of points...
    4 KB (509 words) - 18:35, 31 March 2024
  • Thumbnail for Sperner's lemma
    Sperner's lemma (category Fixed-point theorems)
    Mathematical Encyclopaedia (ed. I.M. Vinogradov), a related 1929 theorem (of Knaster, Borsuk and Mazurkiewicz) had also become known as the Sperner lemma...
    30 KB (4,087 words) - 22:28, 28 August 2024
  • Thumbnail for Discrete geometry
    combinatorics. Lovász's proof used the Borsuk-Ulam theorem and this theorem retains a prominent role in this new field. This theorem has many equivalent versions...
    15 KB (1,575 words) - 05:36, 16 October 2024
  • Thumbnail for Simplicial complex
    complex Tucker's lemma Simplex tree Matoušek, Jiří (2007). Using the Borsuk-Ulam Theorem: Lectures on Topological Methods in Combinatorics and Geometry (2nd ed...
    14 KB (1,992 words) - 00:21, 18 May 2025
  • Press. ISBN 978-0-201-62728-2. Matoušek, Jiří (2007). Using the Borsuk-Ulam Theorem: Lectures on Topological Methods in Combinatorics and Geometry (2nd ed...
    8 KB (1,313 words) - 20:20, 3 February 2025
  • Thumbnail for Universal chord theorem
    numbers n. The case when n = 2 can be considered an application of the BorsukUlam theorem to the real line. It says that if f ( x ) {\displaystyle f(x)} is...
    4 KB (708 words) - 03:10, 20 April 2025
  • Thumbnail for Abstract simplicial complex
    Springer-Verlag. p. 9. ISBN 3-540-18190-3. Matoušek, Jiří (2007). Using the Borsuk-Ulam Theorem: Lectures on Topological Methods in Combinatorics and Geometry (2nd ed...
    17 KB (2,486 words) - 22:41, 19 January 2025