ACTA APPLICANDAE MATHEMATICAE, vol.71, no.2, pp.117-126, 2002 (SCI-Expanded)
Article / Article
ACTA APPLICANDAE MATHEMATICAE
Science Citation Index Expanded (SCI-EXPANDED), Scopus
Istanbul Technical University Affiliated:
An approximation method, based on a theorem on approximating general operator-valued functions by piecewise-linear ones, is presented and analyzed. Using this method, variational characteristics of the spectrum of a class of operator functions are established.