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math.CA2025★ 1 cited
Entrywise transforms preserving matrix positivity and non-positivity
Dominique Guillot, Himanshu Gupta, Prateek Kumar Vishwakarma +1
We characterize real and complex functions which, when applied entrywise to square matrices, yield a positive definite matrix if and only if the original matrix is positive definit…
math.CA2023
On an Erdős similarity problem in the large
Xiang Gao, Yuveshen Mooroogen, Chi Hoi Yip
In a recent paper, Kolountzakis and Papageorgiou ask if for every , there exists a set such that for every int…