@InProceedings{etessami_et_al:LIPIcs.ITCS.2020.18, author = {Etessami, Kousha and Papadimitriou, Christos and Rubinstein, Aviad and Yannakakis, Mihalis}, title = {{Tarski’s Theorem, Supermodular Games, and the Complexity of Equilibria}}, booktitle = {11th Innovations in Theoretical Computer Science Conference (ITCS 2020)}, pages = {18:1--18:19}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-134-4}, ISSN = {1868-8969}, year = {2020}, volume = {151}, editor = {Vidick, Thomas}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ITCS.2020.18}, URN = {urn:nbn:de:0030-drops-117037}, doi = {10.4230/LIPIcs.ITCS.2020.18}, annote = {Keywords: Tarski’s theorem, supermodular games, monotone functions, lattices, fixed points, Nash equilibria, computational complexity, PLS, PPAD, stochastic games, oracle model, lower bounds} }