Proves a case of Chollet's conjecture for bipartite-support Z-matrices and gives a coalescence-based framework that preserves the Laplacian permanent inequality.
Notes on Hadamard products of matrices.Linear and Multilinear Algebra, 25(3):237–242
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On Chollet's Permanent Conjecture for Graph Laplacians
Proves a case of Chollet's conjecture for bipartite-support Z-matrices and gives a coalescence-based framework that preserves the Laplacian permanent inequality.