Understanding model counting for $β$-acyclic CNF-formulas

Johann Brault-Baron; Florent Capelli; Stefan Mengel

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arXiv · 1405.6043

Understanding model counting for $β$-acyclic CNF-formulas

Johann Brault-Baron·Florent Capelli·Stefan Mengel

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Abstract

We extend the knowledge about so-called structural restrictions of $\mathrm{\#SAT}$ by giving a polynomial time algorithm for $β$-acyclic $\mathrm{\#SAT}$. In contrast to previous algorithms in the area, our algorithm does not proceed by dynamic programming but works along an elimination order, solving a weighted version of constraint satisfaction. Moreover, we give evidence that this deviation from more standard algorithm is not a coincidence, but that there is likely no dynamic programming algorithm of the usual style for $β$-acyclic $\mathrm{\#SAT}$.

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Johann Brault-Baron, Florent Capelli, Stefan Mengel. 2014-05-23. Understanding model counting for $β$-acyclic CNF-formulas. https://arxiv.org/abs/1405.6043

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