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Weighted First-Order Model Counting (WFOMC) computes the weighted sum of the models of a first-order theory on a given finite domain. WFOMC has emerged as a fundamental tool for probabilistic inference. Algorithms for WFOMC that run in…

Artificial Intelligence · Computer Science 2021-05-31 Sagar Malhotra , Luciano Serafini

Weighted First Order Model Counting (WFOMC) is fundamental to probabilistic inference in statistical relational learning models. As WFOMC is known to be intractable in general ($\#$P-complete), logical fragments that admit polynomial time…

Artificial Intelligence · Computer Science 2025-02-27 Sagar Malhotra , Davide Bizzaro , Luciano Serafini

Weighted First-Order Model Counting (WFOMC) computes the weighted sum of the models of a first-order logic theory on a given finite domain. First-Order Logic theories that admit polynomial-time WFOMC w.r.t domain cardinality are called…

Logic in Computer Science · Computer Science 2022-04-13 Sagar Malhotra , Luciano Serafini

Weighted model counting (WMC) is the task of computing the weighted sum of all satisfying assignments (i.e., models) of a propositional formula. Similarly, weighted model sampling (WMS) aims to randomly generate models with probability…

Artificial Intelligence · Computer Science 2024-06-17 Yuanhong Wang , Juhua Pu , Yuyi Wang , Ondřej Kuželka

The Weighted First-Order Model Counting Problem (WFOMC) asks to compute the weighted sum of models of a given first-order logic sentence over a given domain. The boundary between fragments for which WFOMC can be computed in polynomial time…

Logic in Computer Science · Computer Science 2025-08-18 Qipeng Kuang , Václav Kůla , Ondřej Kuželka , Yuanhong Wang , Yuyi Wang

It is known due to the work of Van den Broeck et al [KR, 2014] that weighted first-order model counting (WFOMC) in the two-variable fragment of first-order logic can be solved in time polynomial in the number of domain elements. In this…

Artificial Intelligence · Computer Science 2020-08-17 Ondrej Kuzelka

We consider the task of weighted first-order model counting (WFOMC) used for probabilistic inference in the area of statistical relational learning. Given a formula $\phi$, domain size $n$ and a pair of weight functions, what is the…

Artificial Intelligence · Computer Science 2022-11-03 Jan Tóth , Ondřej Kuželka

The Weighted First-Order Model Counting Problem (WFOMC) asks to compute the weighted sum of models of a given first-order logic sentence over a given domain. It can be solved in time polynomial in the domain size for sentences from the…

Logic in Computer Science · Computer Science 2025-12-09 Qipeng Kuang , Ondřej Kuželka , Yuanhong Wang , Yuyi Wang

The Weighted First-Order Model Counting Problem (WFOMC) asks to compute the weighted sum of models of a given first-order logic sentence over a given domain. Conditioning WFOMC on evidence -- fixing the truth values of a set of ground…

Logic in Computer Science · Computer Science 2025-12-02 Václav Kůla , Qipeng Kuang , Yuyi Wang , Yuanhong Wang , Ondřej Kuželka

We study the symmetric weighted first-order model counting task and present ApproxWFOMC, a novel anytime method for efficiently bounding the weighted first-order model count in the presence of an unweighted first-order model counting…

Artificial Intelligence · Computer Science 2020-01-16 Timothy van Bremen , Ondrej Kuzelka

We investigate lifted inference on ordered domains with predecessor relations, where the elements of the domain respect a total (cyclic) order, and every element has a distinct (clockwise) predecessor. Previous work has explored this…

Artificial Intelligence · Computer Science 2025-07-28 Kuncheng Zou , Jiahao Mai , Yonggang Zhang , Yuyi Wang , Ondřej Kuželka , Yuanhong Wang , Yi Chang

We study the time complexity of the weighted first-order model counting (WFOMC) over the logical language with two variables and counting quantifiers. The problem is known to be solvable in time polynomial in the domain size. However, the…

Logic in Computer Science · Computer Science 2024-08-26 Jan Tóth , Ondřej Kuželka

First-order model counting (FOMC) is a computational problem that asks to count the models of a sentence in finite-domain first-order logic. In this paper, we argue that the capabilities of FOMC algorithms to date are limited by their…

Logic in Computer Science · Computer Science 2023-06-08 Paulius Dilkas , Vaishak Belle

In this paper we study lifted inference for the Weighted First-Order Model Counting problem (WFOMC), which counts the assignments that satisfy a given sentence in first-order logic (FOL); it has applications in Statistical Relational…

Artificial Intelligence · Computer Science 2019-11-12 Eric Gribkoff , Guy Van den Broeck , Dan Suciu

First-order model counting (FOMC) is the problem of counting the number of models of a sentence in first-order logic. Since lifted inference techniques rely on reductions to variants of FOMC, the design of scalable methods for FOMC has…

Logic in Computer Science · Computer Science 2025-06-11 Ananth K. Kidambi , Guramrit Singh , Paulius Dilkas , Kuldeep S. Meel

It was recently shown by van den Broeck at al. that the symmetric weighted first-order model counting problem (WFOMC) for sentences of two-variable logic FO2 is in polynomial time, while it is Sharp-P_1 complete for some FO3-sentences. We…

Logic in Computer Science · Computer Science 2018-04-27 Antti Kuusisto , Carsten Lutz

In this paper, we study the sampling problem for first-order logic proposed recently by Wang et al. -- how to efficiently sample a model of a given first-order sentence on a finite domain? We extend their result for the…

Artificial Intelligence · Computer Science 2023-05-09 Yuanhong Wang , Juhua Pu , Yuyi Wang , Ondřej Kuželka

The FO Model Counting problem (FOMC) is the following: given a sentence $\Phi$ in FO and a number $n$, compute the number of models of $\Phi$ over a domain of size $n$; the Weighted variant (WFOMC) generalizes the problem by associating a…

Databases · Computer Science 2015-06-02 Paul Beame , Guy Van den Broeck , Eric Gribkoff , Dan Suciu

Various methods for lifted probabilistic inference have been proposed, but our understanding of these methods and the relationships between them is still limited, compared to their propositional counterparts. The only existing theoretical…

Artificial Intelligence · Computer Science 2012-08-27 Nima Taghipour , Daan Fierens , Guy Van den Broeck , Jesse Davis , Hendrik Blockeel

In Weighted Model Counting (WMC) we assign weights to Boolean literals and we want to compute the sum of the weights of the models of a Boolean function where the weight of a model is the product of the weights of its literals. WMC was…

Quantum Physics · Physics 2020-02-18 Fabrizio Riguzzi
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