Home›Browse›projection🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийالعربية한국어中文日本語EntityQ13415428· pop 19· linked from 151 articlesprojectionSign in to saveidempotent mapping of a set into its subsetAvailable in 19 languagesEspañol中文日本語РусскийPortuguêsArmenianCatalanGalicianLithuanianNederlandsNorwegian NynorskPolskiRomanianSerbiansimpleSvenskaUkrainian한국어via Wikidata sitelinks · CC0