Home›Browse›取反🌐中文EnglishEspañolFrançaisItalianoPolskiPortuguês中文EntityQ4249733· pop 7· linked from 25 articles取反Sign in to saveAlso known as complement classrelating to decision problems and complexity classesAvailable in 7 languagesEspañolFrançaisPortuguêsItalianoIdoPolskivia Wikidata sitelinks · CC0