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Geometric vs Algebraic Nullity for Hyperpaths
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abstract
We consider the question of how the eigenvarieties of a hypergraph relate to the algebraic multiplicities of their corresponding eigenvalues. Specifically, we (1) fully describe the irreducible components of the zero-eigenvariety of a loose $3$-hyperpath (its "nullvariety"), (2) use recent results of Bao-Fan-Wang-Zhu to compute the corresponding algebraic multiplicity of zero (its "nullity"), and then (3) for this special class of hypergraphs, verify a conjecture of Hu-Ye about the relationship between the geometric (multi-)dimension of the nullvariety and the nullity.
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Cited by 1 Pith paper
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Spectral Theory of Hypergraphs: A Survey
A survey of hypergraph spectral theory via tensors, compiling known bounds, characteristic polynomials, and Turán-type results without new mathematical contributions.
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