A Recursive Approach to Solving Parity Games in Quasipolynomial Time

oleh: Karoliina Lehtinen, Paweł Parys, Sven Schewe, Dominik Wojtczak

Format: Article
Diterbitkan: Logical Methods in Computer Science e.V. 2022-01-01

Deskripsi

Zielonka's classic recursive algorithm for solving parity games is perhaps the simplest among the many existing parity game algorithms. However, its complexity is exponential, while currently the state-of-the-art algorithms have quasipolynomial complexity. Here, we present a modification of Zielonka's classic algorithm that brings its complexity down to $n^{O\left(\log\left(1+\frac{d}{\log n}\right)\right)}$, for parity games of size $n$ with $d$ priorities, in line with previous quasipolynomial-time solutions.