一句话:提出用遗忘模态逻辑统一刻画余代数迹语义,并给出其与确定化构造一致及典范确定化存在的条件。
本文以模态逻辑为统一框架研究余代数的迹语义,特别是通过遗忘逻辑(forgetful logics)将逻辑语义与行为语义联系起来。作者以加权自动机、交替自动机、树自动机的语言语义以及生成式概率系统的迹语义等为例,展示该方法的表达力和灵活性。文中给出一个充分条件,保证由逻辑语义定义的迹与经由给定确定化构造得到的迹语义一致;进一步提出一个条件,确保存在相对于给定逻辑语义正确的典范确定化过程,并指出该过程与 Brzozowski 最小化算法密切相关。
We use modal logic as a framework for coalgebraic trace semantics, and show the flexibility of the approach with concrete examples such as the language semantics of weighted, alternating and tree automata, and the trace semantics of generative probabilistic systems. We provide a sufficient condition under which a logical semantics coincides with the trace semantics obtained via a given determinization construction. Finally, we consider a condition that guarantees the existence of a canonical determinization procedure that is correct with respect to a given logical semantics. That procedure is closely related to Brzozowski's minimization algorithm.