Anastassiou, George A. Ostrowski inequalities for cosine and sine operator functions. (English) Zbl 1289.47088 Mat. Vesn. 64, No. 4, 336-346 (2012). Some Ostrowski type inequalities are proved for cosine and sine operator functions in Banach spaces under various norms. As corollaries, applications to second order differential operators are derived. Reviewer: Zoran Kadelburg (Beograd) Cited in 1 Document MSC: 47D09 Operator sine and cosine functions and higher-order Cauchy problems 26D99 Inequalities in real analysis Keywords:cosine operator function PDFBibTeX XMLCite \textit{G. A. Anastassiou}, Mat. Vesn. 64, No. 4, 336--346 (2012; Zbl 1289.47088)