Scalar and Vectorial mu-calculus with Atoms
arXiv:1803.06752 · doi:10.23638/LMCS-15(4:5)2019
Abstract
We study an extension of modal -calculus to sets with atoms and we study its basic properties. Model checking is decidable on orbit-finite structures, and a correspondence to parity games holds. On the other hand, satisfiability becomes undecidable. We also show expressive limitations of atom-enriched -calculi, and explain how their expressive power depends on the structure of atoms used, and on the choice between basic or vectorial syntax.