Strong homotopy types, nerves and collapses

Details Strong homotopy types, nerves and collapses Strong homotopy types, nerves and collapses

2009-07-17

arxiv.org/abs/0907.2954v1

Mathematics

Geometric Topology

24 pages, 8 figures

Scientific paper

We introduce the theory of strong homotopy types of simplicial complexes. Similarly to classical simple homotopy theory, the strong homotopy types can be described by elementary moves. An elementary move in this setting is called a strong collapse and it is a particular kind of simplicial collapse. The advantage of using strong collapses is the existence and uniqueness of cores and their relationship with the nerves of the complexes. From this theory we derive new results for studying simplicial collapsibility with a different point of view. We analyze vertex-transitive simplicial $G$-actions and prove a particular case of the Evasiveness conjecture for simplicial complexes. Moreover, we reduce the general conjecture to the class of minimal complexes. We also strengthen a result of V. Welker on the barycentric subdivision of collapsible complexes. We obtain this and other results on collapsibility of polyhedra by means of the characterization of the different notions of collapses in terms of finite topological spaces.

Affiliated with

Also associated with

No associations

Rating

Strong homotopy types, nerves and collapses does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Strong homotopy types, nerves and collapses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strong homotopy types, nerves and collapses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-109905