71 citations · 300 across the 27 of their papers we have counts for
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math.FA2017★ 1 cited
Total-positivity preservers
Alexander Belton, Dominique Guillot, Apoorva Khare +1
We prove that the only entrywise transforms of rectangular matrices which preserve total positivity or total non-negativity are either constant or linear. This follows from an exte…
math.RA2017★ 3 cited
Simultaneous kernels of matrix Hadamard powers
Alexander Belton, Dominique Guillot, Apoorva Khare +1
In previous work [Adv. Math. 298, pp. 325-368, 2016], the structure of the simultaneous kernels of Hadamard powers of any positive semidefinite matrix were described. Key ingredien…