研究了判定问题“对于命题CNF公式F和H,是否存在一个变元(或文字)改名φ,使得φ(F)=H?”的复杂性.对于极小不可满足公式的子类MAX和MARG,我们证明了:其变元改名和文字改名的复杂性等价于图同构问题GI.
We investigate the complexity of deciding whether for propositional CNF formulas F and H there exists a variable renaming or a literal renaming φ such that φ(F) = H. For the subclasses MAX and MARG of minimal unsatisfiable formulas, we show that the variable and literal renaming problems are equivalent to the graph isomorphism problem GI.