Grzegorz Graff

collaborators

2 papers

math.GN2026

Nielsen coincidence theory of $(n, m)$ -valued pairs of maps

Grzegorz Graff, P. Christopher Staecker, Alan Å»eromski

We consider pairs of maps $(f, g)$ , where $f$ is an $n$ -valued map and $g$ is an $m$ -valued map, defined on connected finite polyhedra. A point $x$ such that $f(x)\cap g(x)\neq \emp…

math.DS2025

Fixed point indices of iterates of orientation-reversing homeomorphisms

Grzegorz Graff, Patryk TopÃ³r

We show that any sequence of integers satisfying necessary Dold's congruences is realized as the sequence of fixed point indices of the iterates of an orientation-reversing homeomo…

Nielsen coincidence theory of (n,m)-valued pairs of maps

Fixed point indices of iterates of orientation-reversing homeomorphisms

Nielsen coincidence theory of $(n, m)$ -valued pairs of maps