English Closure (mathematics) Cited by user D.Lazard on 16 Apr 2022 In mathematics, a subset of a given set is closed under an operation of the larger set if performing that operation on members of the subset always produces a member of…
English Converse relation Cited by user Rgdboer on 07 Apr 2022 The notation is analogous with that for an inverse function. Although many functions do not have an inverse, every relation does have a unique converse.
Romanian Închidere (matematică) Cited by user Andrei Stroe on 17 Apr 2019 O mulțime este închisă în raport cu o operație dacă executarea acelei operații asupra membrilor mulțimii produce întotdeauna un membru al acelei mulțimi.