Optimal Gersgorin-style estimation of the singular value
Ch. Johnson, Juan Manuel Peña, Tomasz Szulc · Electronic Journal of Linear Algebra · 2012
In estimating the largest singular value of an n-by-n complex matrix, a prior result shows that it is attained at one of n(n−1) sparse matrices in the equiradial class. Here, circumstancesare identified under which the set of possible optimizers canbe further narrowed. The results used to show this may be of independent interest.