Torus embeddings and algebraic intersection complexes, II

Details Torus embeddings and algebraic intersection complexes, II Torus embeddings and algebraic intersection complexes, II

1994-03-11

arxiv.org/abs/alg-geom/9403009v1

Mathematics

Algebraic Geometry

47 pages, latex

Scientific paper

In the previous paper, we describe the intersection complexes of a toric variety as a finite complex of graded exterior modules on the associated fan. In this second part, we rewrite it explicitly by the barycentric subdivision of the fan. We get the decomposition theorem of the intersection homologies for a barycentric subdivision of a fan in the case of middle perversity. We get also the diagonal theorems I and II. These theorems give a new proof of the g-comnjecture on a simplicial polytope which was proved by R. Stanley.

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