🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийالعربيةفارسی한국어中文日本語EntityQ612991· pop 18· linked from 151 articlesHilbert matrixsquare matrix whose entries are unit fractions of special formAvailable in 18 languagesEspañolFrançaisDeutsch中文日本語РусскийItalianoالعربيةCatalanEsperantoGreekConnectionsinvertible matrixEntityblock matrixEntityCategoriesApproximation theoryDeterminantsMatrices (mathematics)Numerical linear algebra