Linear operators form the cornerstone of analysis in Banach spaces, offering a framework in which one can rigorously study continuity, spectral properties and stability. Banach space theory, with its ...

Filomat, Vol. 30, No. 7, The 22nd International Conference on Finite and Infinite Dimensional Complex Analysis and Applications (2016), pp. 1853-1868 (16 pages) N. L. Braha, H. M. Srivastava and S. A.

Let H be a Hilbert space with inner-product (x, y), and let R be a bounded positive operator on H which determines an inner-product, $\langle x,y\rangle $ = (Rx, y), x, y ∈ H. Denote by H- the ...