Bru García, RafaelGasso Matoses, María TeresaSantana-De Asis, Máximo De Jesús2022-04-272022-04-272022-01-010096-3003https://riunet.upv.es/handle/10251/182187[EN] In this work, we study a lower bound of the condition number of a matrix by its combined matrix. In particular, we construct a special combined matrix in such a way that the sums of its columns are lower bounds of the condition number of the matrix. Cases for special matrices as unitary matrices are considered.Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)Combined matrixReduced combined matrixCondition numberMATEMATICA APLICADAArtículo10.1016/j.amc.2021.126549Abierto