ArticleTalk English ReadEditView history Tools Tools move to sidebar hide Actions ReadEditView history General What links hereRelated changesUpload filePermanent linkPage informationCite this pageGet shortened URLDownload QR code Edit interlanguage links Print/export Download as PDFPrintable version In other projects Wikimedia CommonsWikidata item Appearance move to sidebar hide TextSmallStandardLargeThis page always uses small font sizeWidthStandardWideThe content is as wide as possible for your browser window.Color (beta)AutomaticLightDarkThis page is always in light mode. From Wikipedia, the free encyclopedia A closed curve divides the plane into two regions

Illustration of the Jordan curve theorem. The Jordan curve (drawn in black) divides the plane into an "interior" region (light blue) and an "exterior" region (pink).