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arXiv · 2403.10314

Hunter's positivity theorem and random vector norms

Ludovick Bouthat·Ángel Chávez·Stephan Ramon Garcia
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Abstract

A theorem of Hunter ensures that the complete homogeneous symmetric polynomials of even degree are positive definite functions. A probabilistic interpretation of Hunter's theorem suggests a broad generalization: the construction of so-called random vector norms on square complex matrices. This paper surveys these ideas, starting from the fundamental notions and developing the theory to its present state. We study numerous examples and present a host of open problems.

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Ludovick Bouthat, Ángel Chávez, Stephan Ramon Garcia. 2024-03-15. Hunter's positivity theorem and random vector norms. https://doi.org/10.1007/978-3-032-00155-9_6

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