Operator norms as bounds for roots of algebraic equations
Masatoshi Fujii, Fumio Kubo · Proceedings of the Japan Academy Series A Mathematical Sciences · 1973
1. Introduction.Very recently, Ifantis and Kouris [1] show, a Hilbert space approach is powerful to give bounds o roots o algebraic equations; actually, they show that the operator bound of a perturba- tion of the simple unilateral shit by a dyad gives certain bounds o