We show that for all k 1 and n 0 the simplicial complexes T (k) n of all leaflabelled trees with nk+2 leaves and all interior vertices of degrees kl+2 (l 1) are shellable. This yields a direct combinatorial proof that they are Cohen Macaulay and that their homotopy types are wedges of spheres.
Shellability of chessboard complexes
✍ Scribed by Günter M. Ziegler
- Book ID
- 112889304
- Publisher
- The Hebrew University Magnes Press
- Year
- 1994
- Tongue
- English
- Weight
- 572 KB
- Volume
- 87
- Category
- Article
- ISSN
- 0021-2172
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📜 SIMILAR VOLUMES
For a simplicial complex 2 and coefficient domain F let F2 be the F-module with basis 2. We investigate the inclusion map given by : { [ \_ 1 +\_ 2 +\_ 3 + } } } +\_ k which assigns to every face { the sum of the co-dimension 1 faces contained in {. When the coefficient domain is a field of characte
We prove that matroid complexes of rank 3 are extendably shellable. Let (,") be the family of k-element subsets of a finite set E. There is a conjecture of Simon [lo] that (f) is extendably shellable for every k. In this paper we will prove that matroid complexes of rank 3 are extendably shellable.