Invariance of total nonnegativity of a tridiagonal matrix under element-wise perturbation
Mohammad Adm, Jürgen Garloff · Operators and Matrices · 2014
Tridiagonal matrices are considered which are totally nonnegative, i. e., all their minors are nonnegative. The largest amount is given by which the single entries of such a matrix can be perturbed without losing the property of total nonnegativity.