奇偶判定树的直和
Direct Sums for Parity Decision Trees
AI总结:
本文在随机化奇偶判定树模型中证明了首个直和定理,指出在采用差异法或相对乘积分布证明下界时,求解k个实例的代价至少为单实例的Ω(k)倍。
摘要:
直和定理指出,求解一个问题的k个实例的代价至少是求解单个实例代价的Ω(k)倍。我们在随机化奇偶判定树模型中证明了首个此类结果。我们证明了在以下任一情况下直和定理成立:(1)奇偶判定树的下界是使用差异法证明的;或者(2)该下界是相对于乘积分布证明的。
英文摘要:
Direct sum theorems state that the cost of solving $k$ instances of a problem is at least $Ω(k)$ times the cost of solving a single instance. We prove the first such results in the randomised parity decision tree model. We show that a direct sum theorem holds whenever (1) the lower bound for parity decision trees is proved using the discrepancy method; or (2) the lower bound is proved relative to a product distribution.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。