Intersection Homology. General perversities and topological invariance
Abstract
Topological invariance of the intersection homology of a pseudomanifold without codimension one strata, proven by Goresky and MacPherson, is one of the main features of this homology. This property is true for codimension-dependent perversities with some growth conditions, verifying . King reproves this invariance by associating an intrinsic pseudomanifold to any pseudomanifold . His proof consists of an isomorphism between the associated intersection homologies for any perversity with the same growth conditions verifying . In this work, we prove a certain topological invariance within the framework of strata-dependent perversities, , which corresponds to the classical topological invariance if is a GM-perversity. We also extend it to the tame intersection homology, a variation of the intersection homology, particularly suited for ``large'' perversities, if there is no singular strata on becoming regular in . In particular, under the above conditions, the intersection homology and the tame intersection homology are invariant under a refinement of the stratification.
Cite
@article{arxiv.1602.03009,
title = {Intersection Homology. General perversities and topological invariance},
author = {David Chataur and Martintxo Saralegi-Aranguren and Daniel Tanré},
journal= {arXiv preprint arXiv:1602.03009},
year = {2019}
}