Two algorithms using bigraph inflations test positive definiteness of unidiagonal integral matrices with O(n^3) and O(n^4) pessimistic complexity and Las Vegas variants.
Kosakowska, Inflation algorithms for positive and pr incipal edge- bipartite graphs and unit quadratic forms, Fund
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Two nondeterministic positive definiteness tests for unidiagonal integral matrices
Two algorithms using bigraph inflations test positive definiteness of unidiagonal integral matrices with O(n^3) and O(n^4) pessimistic complexity and Las Vegas variants.