Algebraic Shifting and Basic Constructions on Simplicial Complexes
Algebraic Shifting and Basic Constructions on Simplicial Complexes
复制标题
代数平移和单纯复形的基本构造
DOI:
10.1007/s10801-005-4626-0
复制
发表时间:
2003
影响因子:
0.8
通讯作者:
Eran Nevo
中科院分区:
文献类型:
--
作者:
Eran Nevo
We try to understand the behavior of algebraic shifting with respect to some basic constructions on simplicial complexes, such as union, coning, and (more generally) join. In particular, for the disjoint union of simplicial complexes we prove Δ(K ˙∪ L) = Δ(Δ(K) ˙∪ Δ(L)) (conjectured by Kalai [6]), and for the join we give an example of simplicial complexes K and L for which Δ(K*L)≠Δ(Δ(K)*Δ(L)) (disproving a conjecture by Kalai [6]), where Δ denotes the (exterior) algebraic shifting operator. We develop a ‘homological’ point of view on algebraic shifting which is used throughout this work.