🌐EnglishEnglishBahasa IndonesiaEspañolFrançaisItalianoPolskiPortuguêsРусскийالعربيةفارسی中文日本語EntityQ9391599· pop 17· linked from 22 articlestombstoneAlso known as Halmos, end of proof, ∎, q.e.d., tombstone mark, Halmos finality symbolsymbol used in mathematics and typographyAvailable in 17 languagesEspañolFrançais中文日本語РусскийPortuguêsItalianoالعربيةBahasa IndonesiaGalicianConnectionsInternational Standard Book NumberEntitymagazineEntityCategoriesMathematical proofsMathematical symbolsTypography