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Introduction Orderedbinarydecisiondiagrams(OBDDs)[1]areefficientrepresentationsofBooleanfunctions.However,thesizeofOBDDsdependsheavilyonvariableordering[1].HowtofindasatisfyingvariableorderisthuscrucialtotheapplicationofOBDDs[211].HeuristicanddynamicmethodsarewidelyusedinorderingthevariablesforOBDDs.Heuristicmethodsusetheinformationimpliedinthecircuitstructure,whiledynamicmethodsimprovethevariableordergraduallyongivenOBDDs.Althoughadynamicmethodmaygivebetterresults,itsruntimedepen… 相似文献