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Parameterized Valiant's Classes

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arxiv 1907.12287 v2 pith:SFJ3EGXF submitted 2019-07-29 cs.CC

Parameterized Valiant's Classes

classification cs.CC
keywords classesparameterizedbooleandefinecompletenesscomplexitycountingproof
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We define a theory of parameterized algebraic complexity classes in analogy to parameterized Boolean counting classes. We define the classes VFPT and VW[t], which mirror the Boolean counting classes #FPT and #W[t], and define appropriate reductions and completeness notions. Our main contribution is the VW[1]-completeness proof of the parameterized clique family. This proof is far more complicated than in the Boolean world. It requires some new concepts like composition theorems for bounded exponential sums and Boolean-arithmetic formulas. In addition, we also look at two polynomials linked to the permanent with vastly different parameterized complexity.

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  1. Kronecker products and iterated matrix multiplication

    cs.CC 2026-06 unverdicted novelty 7.0

    Kronecker products applied to iterated matrix multiplication define the hypercomputant, a VNP-complete and VW[1]-complete polynomial whose hardness follows from equivariance, with extensions to semirings, tensor algeb...