Positivity
- Publisher
- Springer
- Year
- 2004
- Tongue
- English
- Weight
- 136 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1385-1292
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We study a heat kernel e &;H defined by a self-adjoint Hamiltonian H acting on a Hilbert space H, and a unitary representation U( g) of a symmetry group G of H, normalized so that the ground vector of H is invariant under U( g). The triple [H, U( g), H] defines a twisted partition function Z g and a
We express the structure of some positive polynomials in several variables, as squares of rational function with universal denominators, using functional analysis methods.
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