Operators and Matrices · Volume 13, Issue 2 On two extremum problems related to the norm of a bounded linear operator 13-31 Pages 421-432 DOI 10.7153/oam-2019-13-31 Downloads Short PDF Full PDF PNG Authors Debmalya Sain Kallol Paul Kalidas Mandal Keywords orthogonality linear operators norm attainment Subject classes 47L05 46B20 46C15