The cd-index of fans and lattices

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

The number of flags in a complete fan, or more generally in an Eulerian poset, is encoded in the cd-index. We prove non-negativity of the cd-index for complete fans, regular CW-spheres and Gorenstein* posets.
The difference between lattices and posets clarified. 19 pages

Keywords

Algebraic Geometry, Combinatorics, 14M25; 06A07

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/72983

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0410513
 http://arxiv.org/abs/math/0410513

Collections

arXiv