科研之友
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摘要
The purpose of this note is to give upper bounds (assuming P different from NP) on how far the generalizations of Skolem sequences can be taken while still hoping to resolve the existence question. We prove that the existence questions for both multi-Skolem sequences and generalized Skolem sequences are strongly NP-complete. These results are significant strengthenings and simplifications of the recent NP-completeness result for generalized multi-Skolem sequences.
- 出版日期2010-4-28
