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.
Simson, Symbolic algorithms computing Gram congrue nces in the Coxeter spectral classification of edge-bipartite grap hs, I
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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.