Fixed-Points for Quantitative Equational Logics

Autor: Mardare, Radu, Panangaden, Prakash, Plotkin, Gordon
Rok vydání: 2021
Předmět:
Zdroj: 36th Anual Symposium on Logics in Computer Science, ACM/IEEE LICS 2021
Druh dokumentu: Working Paper
Popis: We develop a fixed-point extension of quantitative equational logic and give semantics in one-bounded complete quantitative algebras. Unlike previous related work about fixed-points in metric spaces, we are working with the notion of approximate equality rather than exact equality. The result is a novel theory of fixed points which can not only provide solutions to the traditional fixed-point equations but we can also define the rate of convergence to the fixed point. We show that such a theory is the quantitative analogue of a Conway theory and also of an iteration theory; and it reflects the metric coinduction principle. We study the Bellman equation for a Markov decision process as an illustrative example.
Databáze: arXiv