🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийالعربية한국어中文日本語EntityQ428813· pop 20· linked from 228 articlesHessenberg matrixsquare matrix that has zero entries below the first subdiagonal or has zero entries above the first superdiagonalAvailable in 20 languagesEspañolFrançaisDeutsch中文РусскийPortuguêsItalianoالعربيةBasqueCatalanEsperantoConnectionsblock matrixEntityeigenvectors and eigenvaluesEntityCategoriesMatrices (mathematics)