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arXiv 0810.2891cs.LO
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驯服模态不可预测性:超惰性约简

Taming Modal Impredicativity: Superlazy Reduction

Ugo Dal Lago, Luca Roversi, Luca Vercelli

摘要:

纯的或无类型的线性逻辑证明网是图灵完备的,一旦割消被认为是计算。我们引入模态不可预测性作为不可预测性的一种新形式,从复杂性的角度来看,导致割消的复杂性是有问题的。模态不可预测性发生在当在约简期间,盒子b的残差的结论与属于b的另一个残差内的证明网的节点相互作用时。从技术上讲,超级惰性归约是一种新的归约概念,允许控制模态不可预测性。更具体地说,superlazy reduction仅在所有副本都打开时才复制一个盒子。这使得减少证据网的总成本是有限的和可预测的。具体来说,应用于任何纯证明网的超惰性归约都需要原始递归时间。此外,任何原始递归函数都可以通过超惰性归约由纯证明网计算。

英文摘要:

Pure, or type-free, Linear Logic proof nets are Turing complete once cut-elimination is considered as computation. We introduce modal impredicativity as a new form of impredicativity causing the complexity of cut-elimination to be problematic from a complexity point of view. Modal impredicativity occurs when, during reduction, the conclusion of a residual of a box b interacts with a node that belongs to the proof net inside another residual of b. Technically speaking, superlazy reduction is a new notion of reduction that allows to control modal impredicativity. More specifically, superlazy reduction replicates a box only when all its copies are opened. This makes the overall cost of reducing a proof net finite and predictable. Specifically, superlazy reduction applied to any pure proof nets takes primitive recursive time. Moreover, any primitive recursive function can be computed by a pure proof net via superlazy reduction.

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。

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