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Mathematics > Optimization and Control
Title: Convex Ternary Quartics Are SOS-Convex
(Submitted on 19 Apr 2024)
Abstract: We prove that convex ternary quartic forms are sum-of-squares-convex (sos-convex). This result is in a meaningful sense the ``convex analogue'' a celebrated theorem of Hilbert from 1888, where he proves that nonnegative ternary quartic forms are sums of squares. We show by an appropriate construction that exploiting the structure of the Hessian matrix is crucial in any possible proof of our result.
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