一句话:提出 familial monad 范畴框架,统一结构化操作语义,并证明互模拟同余与上下文互模拟可靠性。
本文针对结构化操作语义(SOS)缺乏统一范畴论基础的问题,提出以 familial monads 为核心的范畴框架,用单子结构刻画 SOS 规则及其行为。作者在合适的假设下证明互模拟(bisimilarity)是上下文同余,并进一步细化该框架,证明“上下文互模拟”(bisimulation up to context)方法的可靠性;该方法可显著缩小互模拟关系,从而简化证明。为展示框架的灵活性,作者在三种 π-演算变体中重新证明了已有结果,说明该范畴方法能统一处理不同演算的语义与互模拟性质。
We propose a categorical framework for structural operational semantics, in which we prove that under suitable hypotheses bisimilarity is a congruence. We then refine the framework to prove soundness of bisimulation up to context, an efficient method for reducing the size of bisimulation relations. Finally, we demonstrate the flexibility of our approach by reproving known results in three variants of the π-calculus.