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04/23/2021
Tractability of Quantified Temporal Constraints To The Max
A temporal constraint language is a set of relations that are first-orde...
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09/17/2020
Sparsification Lower Bounds for List H-Coloring
We investigate the List H-Coloring problem, the generalization of graph ...
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07/28/2020
Semantic Width and the Fixed-Parameter Tractability of Constraint Satisfaction Problems
Constraint satisfaction problems (CSPs) are an important formal framewor...
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05/22/2020
Algebraic Global Gadgetry for Surjective Constraint Satisfaction
The constraint satisfaction problem (CSP) on a finite relational structu...
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09/17/2018
Best-case and Worst-case Sparsifiability of Boolean CSPs
We continue the investigation of polynomial-time sparsification for NP-c...
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09/30/2017
Homomorphisms are indeed a good basis for counting: Three fixed-template dichotomy theorems, for the price of one
Many natural combinatorial quantities can be expressed by counting the n...
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04/04/2016
Asking the metaquestions in constraint tractability
The constraint satisfaction problem (CSP) involves deciding, given a set...
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05/19/2014
An Algebraic Hardness Criterion for Surjective Constraint Satisfaction
The constraint satisfaction problem (CSP) on a relational structure B is...
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03/02/2014
Beyond Q-Resolution and Prenex Form: A Proof System for Quantified Constraint Satisfaction
We consider the quantified constraint satisfaction problem (QCSP) which ...
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06/18/2012
On the Complexity of Existential Positive Queries
We systematically investigate the complexity of model checking the exist...
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04/26/2011
