Thom polynomials of invariant cones, Schur functions, and positivity

Details Thom polynomials of invariant cones, Schur functions, and positivity Thom polynomials of invariant cones, Schur functions, and positivity

2007-09-08

arxiv.org/abs/0709.1191v1

Mathematics

Algebraic Geometry

14 pages

Scientific paper

We generalize the notion of Thom polynomials from singularities of maps between two complex manifolds to invariant cones in representations, and collections of vector bundles. We prove that the generalized Thom polynomials, expanded in the products of Schur functions of the bundles, have nonnegative coefficients. For classical Thom polynomials associated with maps of complex manifolds, this gives an extension of our former result for stable singularities to nonnecessary stable ones. We also discuss some related aspects of Thom polynomials, which makes the article expository to some extent.

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