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Characterization of automorphisms of the copositive cone over the nonnegative orthant
Let $S_n$ be the space of real symmetric $n\times n$ matrices, and let … be the cone of copositive matrices. Write $Aut(COP(\mathbb{R}^n_+))$ for its automorphism group, and…
Theoremsolvedcone-automorphisms copositive-cones linear-preserversarXiv posted 3 days ago
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The column-equivalence partition realization conjecture for permutations
Let $n$ be a positive integer, let $\mathcal{F}$ be a partition of $\mathopen{[\![} 1,n\mathclose{]\!]}$ , and let $\mathbb{F}$ be an infinite field. For a mapping…
Conjectureopenlinear-preservers matrix-functionals permutation-groupsarXiv posted 3 days ago

Characterization of automorphisms of the copositive cone over the nonnegative orthant