Category weight: new ideas concerning Lusternik-Schnirelmann category
Cohomology of S1-orbit Spaces of Cohomology Spheres and Cohomology Complex Projective Spaces.
Coincidence classes in nonorientable manifolds.
Coincidence free pairs of maps
This paper centers around two basic problems of topological coincidence theory. First, try to measure (with the help of Nielsen and minimum numbers) how far a given pair of maps is from being loose, i.e. from being homotopic to a pair of coincidence free maps. Secondly, describe the set of loose pairs of homotopy classes. We give a brief (and necessarily very incomplete) survey of some old and new advances concerning the first problem. Then we attack the second problem mainly in the setting of homotopy...
Coincidence index for fiber-preserving maps an approach to stable cohomotopy.
Coincidence of maps in Q-simplicial spaces
Coincidence points and maximal elements of multifunctions on convex spaces
Generalized and unified versions of coincidence or maximal element theorems of Fan, Yannelis and Prabhakar, Ha, Sessa, Tarafdar, Rim and Kim, Mehta and Sessa, Kim and Tan are obtained. Our arguments are based on our recent works on a broad class of multifunctions containing composites of acyclic maps defined on convex subsets of Hausdorff topological vector spaces.
Coincidence set of minimal surfaces for the thin obstacle.
Coincidence theorems, generalized variational inequality theorems, and minimax inequality theorems for the -mapping on -convex spaces.
Coincidence theory for spaces which fiber over a nilmanifold.
Combinatorial necklace splitting.
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.
Connectivity properties for subspaces of function spaces determined by fixed points.
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)