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arXiv cs/0510092cs.LOcs.CC
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上下文语义、线性逻辑与计算复杂性

Context Semantics, Linear Logic and Computational Complexity

Ugo Dal Lago

摘要:

我们表明,上下文语义可以卓有成效地应用于线性逻辑的证明规范化的定量分析。特别是,上下文语义让我们定义一个证明网的权重作为其内在复杂性的度量:它既是规范化时间的上限(模多项式开销,独立于约简策略),也是范式步骤数的下限(对于某些约简策略)。然后利用权证明强可靠性定理的各种子系统的线性逻辑,即初等线性逻辑,软线性逻辑和轻线性逻辑。

英文摘要:

We show that context semantics can be fruitfully applied to the quantitative analysis of proof normalization in linear logic. In particular, context semantics lets us define the weight of a proof-net as a measure of its inherent complexity: it is both an upper bound to normalization time (modulo a polynomial overhead, independently on the reduction strategy) and a lower bound to the number of steps to normal form (for certain reduction strategies). Weights are then exploited in proving strong soundness theorems for various subsystems of linear logic, namely elementary linear logic, soft linear logic and light linear logic.

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