Complexity Classification Transfer for CSPs via Algebraic Products

Bodirsky, Manuel; Jonsson, Peter; Martin, Barnaby; Mottet, Antoine; Semanišinová, Žaneta

doi:10.1137/22m1534304

SIAM J. Comput.

2024

DOI: 10.1137/22m1534304

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Complexity Classification Transfer for CSPs via Algebraic Products

Manuel Bodirsky,

Peter Jonsson,

Barnaby Martin

et al.

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2024

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Smooth approximations: An algebraic approach to CSPs over finitely bounded homogeneous structures

Mottet,

Pinsker

2024

J. ACM

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We introduce the novel machinery of smooth approximations to provide a systematic algebraic approach to the complexity of CSPs over finitely bounded homogeneous structures. We apply smooth approximations to confirm the CSP dichotomy conjecture for first-order reducts of the random tournament, and to give new short proofs of the conjecture for various homogeneous graphs including the random graph (STOC’11, ICALP’16, JACM 2015, SICOMP 2019), and for expansions of the order of the rationals (STOC’08, JACM 2009). Apart from obtaining these dichotomy results, we show how our new proof technique allows to unify and significantly simplify the previous results from the literature. For all but the last structure, we moreover characterize for the first time those CSPs which are solvable by local consistency methods, again using the same machinery.

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Smooth approximations: An algebraic approach to CSPs over finitely bounded homogeneous structures

Mottet,

Pinsker

2024

J. ACM

View full text Add to dashboard Cite

show abstract

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Complexity Classification Transfer for CSPs via Algebraic Products

Cited by 1 publication

References 55 publications

Smooth approximations: An algebraic approach to CSPs over finitely bounded homogeneous structures

Smooth approximations: An algebraic approach to CSPs over finitely bounded homogeneous structures

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