closed set
pl: closed sets
Related Words
open settopologylimit pointboundaryclosureinteriorcomplementneighborhoodpointsetspacemetricconvergencesequenceaccumulation pointintervalsubsetunionintersectionmappingfunctioncontinuityhomeomorphismmanifolddimensionanalysiscalculusgeometryaxiomtheoremprooflemmacorollarydomainrangecodomainoperatornormdistanceradiusdiameterballspherecubeplanelinelimitinfimumsupremumboundcardinalityordinalitypower set