Proves a case of Chollet's conjecture for bipartite-support Z-matrices and gives a coalescence-based framework that preserves the Laplacian permanent inequality.
The Chollet permanental conjecture for4 times4matrices.Linear and Multilinear Algebra, 69(6):1094–1110
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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.