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A noncommutative generalization of Hunter's positivity theorem

Year: 2025
Type: preprint
Abstract: Hunter proved that the complete homogeneous symmetric polynomials of even degree are positive definite. We prove a noncommutative generalization of this result, in which the scalar variables are replaced with hermitian operators. We provide a sharp lower bound and a sum of hermitian squares representation that are novel even in the scalar case.
Language: English
Open Access status: green
OpenAlex ID: W6910728105
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