🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtРусскийفارسی한국어中文日本語EntityQ944297· pop 20· linked from 188 articlesopen mapping theoremAlso known as Banach–Schauder theoremTheorem that surjective continuous operators on Banach spaces are open mapsAvailable in 20 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoCatalanHebrewConnectionsmeagre setEntitynormed vector spaceEntityCategoriesTheorems in functional analysis