Results 11 to 20 of about 55,344 (171)

Lefschetz fixed point theorem for intersection homology

open access: closedCommentarii Mathematici Helvetici, 1985
Es sei X eine kompakte orientierbare n-dimensionale topologische Mannigfaltigkeit. Für eine stetige Selbstabbildung \(f: X\to X\) liefert der klassische Fixpunktsatz von Lefschetz eine notwendige algebraisch- topologische Bedingung für die Existenz von Fixpunkten: Ist \(\Delta\) die Diagonale von \(X\times X\) und G(f) der Graph von f in \(X\times X\),
Mark Goresky, Robert MacPherson
semanticscholar   +4 more sources

The equivariant Lefschetz fixed point theorem for proper cocompact G-manifolds [PDF]

open access: closedHigh-Dimensional Manifold Topology, 2003
Suppose one is given a discrete group G, a cocompact proper Gmanifold M, and a G-self-map f : M ! M. Then we introduce the equivariant Lefschetz class of f, which is globally deflned in terms of cellular chain complexes, and the local equivariant Lefschetz class of f, which is locally deflned in terms of flxed point data.
Wolfgang Lück, Jonathan Rosenberg
semanticscholar   +4 more sources

Once More on the Lefschetz Fixed Point Theorem [PDF]

open access: bronzeBulletin of the Polish Academy of Sciences Mathematics, 2007
Lech Górniewicz, Mirosław Ślosarski
semanticscholar   +3 more sources

Lefschetz fixed point theorems for correspondences [PDF]

open access: green, 2022
The classical Lefschetz fixed point theorem states that the number of fixed points, counted with multiplicity $\pm 1$, of a smooth map $f$ from a manifold $M$ to itself can be calculated as the alternating sum $\sum (-1)^k \textrm{ tr } f^*|_{H^k(M)}$ of the trace of the induced homomorphism in cohomology.
Loring W. Tu
  +5 more sources

The Lefschetz-Hopf theorem and axioms for the Lefschetz number

open access: yesFixed Point Theory and Applications, 2004
The reduced Lefschetz number, that is, L(⋅)−1 where L(⋅) denotes the Lefschetz number, is proved to be the unique integer-valued function λ on self-maps of compact polyhedra which is constant on homotopy classes such that (1) λ(fg ...
Robert F. Brown, Martin Arkowitz
doaj   +7 more sources

Lefschetz-type fixed point theorems for spheric mappings [PDF]

open access: diamondFixed Point Theory, 2018
In this paper, Lefschetz-type fixed point theorems are given for spheric maps on approximative retracts, weak approximative retracts, and multiretracts. The authors also present randomized versions of these theorems and indicate some further generalizations and possibilities. Finally they formulate three open problems.
Ján Andres, Lech Górniewicz
openalex   +3 more sources

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