Pointed and multi-pointed partitions of type A and B
نویسندگان
چکیده
منابع مشابه
Pointed and multi-pointed partitions of type A and B
The aim of this paper is to define and study pointed and multi-pointed partition posets of type A and B (in the classification of Coxeter groups). We compute their characteristic polynomials, incidence Hopf algebras and homology groups. As a corollary, we show that some operads are Koszul over Z. Introduction For every finite Weyl group W , there exists a generalized partition poset (cf. [2]) d...
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ژورنال
عنوان ژورنال: Journal of Algebraic Combinatorics
سال: 2006
ISSN: 0925-9899,1572-9192
DOI: 10.1007/s10801-006-8346-x