一句话:研究同余模簇上电路可满足性分类中 nilpotent 但非 supernilpotent 代数的未决中间情形。
本文关注同余模簇(congruence modular varieties)上有限代数电路可满足性问题的复杂度分类。已有工作将布尔电路可满足性推广到任意有限代数,并初步刻画出多项式时间与 NP-完全之间的边界:supernilpotent 代数上该问题可多项式时间求解,非 nilpotent 情形可证明 NP-hard,但 nilpotent 却非 supernilpotent 的代数构成一个尚未确定的中间区域。本文即针对这一空白展开研究,分析该中间情形下模电路可满足性的复杂度归属,以完善 P 与 NP-完全的分界图景。摘要未展开具体归约或证明细节,评估以理论复杂度与代数分类为主。
In [15] a generalization of Boolean circuits to arbitrary finite algebras had been introduced and applied to sketch P versus NP-complete borderline for circuits satisfiability over algebras from congruence modular varieties. However the problem for nilpotent (which had not been shown to be NP-hard) but not supernilpotent algebras (which had been shown to be polynomial time) remained open.