一句话:将 Atserias 等人的方法推广,证明 NEXP ⊄ EXP/poly 与 NEXP ⊄ coNEXP 在更强有界算术理论中一致。
本文关注复杂性理论中的非包含猜想能否在有界算术中保持一致性。此前 Atserias、Buss 和 Mueller 证明了标准猜想 NEXP ⊄ P/poly 与较强有界算术理论 V^0_2 一致,而 V^0_2 已能形式化相当一部分复杂性理论。作者观察到他们的方法可以推广:在一个更强的理论中,该理论包含所有为真的全称数排序句子,可以证明更强的猜想 NEXP ⊄ EXP/poly 和 NEXP ⊄ coNEXP 同样与该理论一致。这表明这些更强的 NEXP 下界假设不会被该有界算术理论反驳,从而扩展了强下界猜想与形式化复杂性理论之间相对一致性的范围。
It was recently shown by Atserias, Buss and Mueller that the standard complexity-theoretic conjecture NEXP not in P / poly is consistent with the relatively strong bounded arithmetic theory V^0_2, which can prove a substantial part of complexity theory. We observe that their approach can be extended to show that the stronger conjectures NEXP not in EXP / poly and NEXP not in coNEXP are consistent with a stronger theory, which includes every true universal number-sort sentence.