A preliminary version of this paper appeared in the 28th International Symposium on Theoretical Aspectsudof Computer Science (STACS 2011), volume 9 of Leibniz InternationaludProceedings in Informatics (LIPIcs), pp.507-518.
展开▼
机译:本文的初步版本出现在第28届国际理论方面 udof计算机科学研讨会(STACS 2011),Leibniz International udProprocedings in Informatics(LIPIcs)第9卷,第507-518页。
展开▼