🌐EnglishEnglishDeutschEspañolPortuguês中文日本語EntityQ9077988· pop 6· linked from 120 articlesconservative systemsystem with no friction or other mechanism to dissipate the dynamics, such that the phase space does not shrink over timeAvailable in 5 languagesEspañolDeutsch日本語Portuguêsvia Wikidata sitelinks · CC0Connectionsergodic theoryEntityPoincaré recurrence theoremEntityCategoriesDynamical systemsErgodic theory