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Undefinability of Approximation of 2-to-2 Games

Dawar, Anuj et al.
arXiv (All) · Papers
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68q1768q25computational-complexitylogic-in-computer-science
Recent work by Atserias and Dawar (J. Log. Comp 2019) and Tucker-Foltz (LMCS 2024) has established undefinability results in fixed-point logic with counting (FPC) corresponding to many classical complexity results from the hardness of approximation. In this line of work, NP-hardness results are turn
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