Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4588434 | Journal of Algebra | 2008 | 17 Pages |
Abstract
A semisimple monoid M is called quasismooth if M∖{0} has sufficiently mild singularities. We define a cellular decomposition of such monoids using the method of one-parameter subgroups. These cells turn out to be “almost” affine spaces. But they can also be described in terms of the idempotents and B×B-orbits of M. This leads to a number of combinatorial results about the inverse monoid of B×B-orbits of M. In particular, we obtain fundamental information about the H-polynomial of M.
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Physical Sciences and Engineering
Mathematics
Algebra and Number Theory