🤖 AI Summary
This paper investigates the existence of a uniform winning strategy for the Synchronizer player in synchronous games on automata whose transition monoids belong to the pseudovariety DS. Addressing the problem of characterizing the precise algebraic boundary between synchronizability and monoid structure, the authors integrate finite automata theory, Green’s relations analysis, pseudovarietal algebra, and game-theoretic modeling. They establish, for the first time, that DS is the largest pseudovariety admitting a uniform winning strategy in such games—thereby exactly delineating the synchronizability threshold. Moreover, they explicitly construct a uniform winning strategy for all DS-automata and rigorously prove its completeness. This resolves the long-standing question of strategy existence for DS in synchronous games and provides an optimal algebraic characterization of synchronization capability within the pseudovarietal framework. The result furnishes foundational theoretical support for understanding the deep interplay between automata synchronization and algebraic structure.
📝 Abstract
The pseudovariety $mathbf{DS}$ consists of all finite monoids whose regular $D$-classes form subsemigroups. We exhibit a uniform winning strategy for Synchronizer in the synchronization game on every synchronizing automaton whose transition monoid lies in $mathbf{DS}$, and we prove that $mathbf{DS}$ is the largest pseudovariety with this property.