Combinatorial necklace splitting.
Completely regular mappings with compact ANR fiber
Complexe dualisant et théorèmes de dualité en géométrie analytique complexe
Computer calculation of the degree of maps into the Poincaré homology sphere.
Computing Reidemeister classes
In order to compute the Nielsen number N(f) of a self-map f: X → X, some Reidemeister classes in the fundamental group need to be distinguished. In this paper some algebraic results are given which allow distinguishing Reidemeister classes and hence computing the Reidemeister number of some maps. Examples of computations are presented.
Computing the Topological Degree of a Mapping in Rn .
Concerning locally homotopy negligible sets and characterization of -manifolds
Conjugation spaces.
Connected covers and Neisendorfer's localization theorem
Our point of departure is J. Neisendorfer's localization theorem which reveals a subtle connection between some simply connected finite complexes and their connected covers. We show that even though the connected covers do not forget that they came from a finite complex their homotopy-theoretic properties are drastically different from those of finite complexes. For instance, connected covers of finite complexes may have uncountable genus or nontrivial SNT sets, their Lusternik-Schnirelmann category...
Connectivity properties for subspaces of function spaces determined by fixed points.
Constructive dimension theory
Correction to “Fixed points of maps of a nonaspherical wedge”.
Correction to my paper "Topological contraction principle" (Fundamenta Mathematicae 110 (1980), pp. 135-144)
Corrections to "On the computation of the Nielsen numbers and the converse of the Lefschetz coincidence theorem" (Fund. Math. 140 (1992), 191–196)
Corrigendum et addendum ad: “Minimal cell coverings of sphere bundles over spheres”
Corrigendum to: “On ".
Counting connected components of the complement of the image of a codimension 1 map
Covering maps for locally path-connected spaces
We define Peano covering maps and prove basic properties analogous to classical covers. Their domain is always locally path-connected but the range may be an arbitrary topological space. One of characterizations of Peano covering maps is via the uniqueness of homotopy lifting property for all locally path-connected spaces. Regular Peano covering maps over path-connected spaces are shown to be identical with generalized regular covering maps introduced by Fischer and Zastrow....
Coverings and ring-groupoids.
Critical point theory with symmetries.