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math.FA2021
Preservers of totally positive kernels and Polya frequency functions
Alexander Belton, Dominique Guillot, Apoorva Khare +1
Fractional powers and polynomial maps preserving structured totally positive matrices, one-sided Polya frequency functions, or totally positive kernels are treated from a unifying…
math.CA2021★ 5 cited
Hirschman-Widder densities
Alexander Belton, Dominique Guillot, Apoorva Khare +1
Hirschman and Widder introduced a class of Pólya frequency functions given by linear combinations of one-sided exponential functions. The members of this class are probability dens…