🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ620495· pop 31· linked from 638 articlesHessian matrixmatrix of second derivativesAvailable in 31 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةBahasa IndonesiaCatalanConnectionseigenvectors and eigenvaluesEntityblock matrixEntityCategoriesDifferential operatorsMatrices (mathematics)Morse theoryMultivariable calculusSingularity theory