QCSP on partially reflexive cycles - the wavy line of tractability

Published 28 Feb 2013 in cs.CC | (1303.0041v1)

Abstract: We study the (non-uniform) quantified constraint satisfaction problem QCSP(H) as H ranges over partially reflexive cycles. We obtain a complexity-theoretic dichotomy: QCSP(H) is either in NL or is NP-hard. The separating conditions are somewhat esoteric hence the epithet "wavy line of tractability".

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