🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPortuguêsРусскийفارسی한국어中文日本語EntityQ1632419· pop 18· linked from 100 articlesPontryagin dualityduality for locally compact abelian groupsConnectionsp-adic numberEntityabelian groupEntityCategoriesDuality (mathematics)Fourier analysisHarmonic analysisLp spacesTheorems in mathematical analysis