Results 41 to 50 of about 165,123,802 (106)

Compact inverses of multipoint normal differential operators for first order

open access: yesElectronic Journal of Differential Equations, 2011
In this work, we describe all normal extensions of a multipoint minimal operators generated by linear multipoint differential-operator expressions for first order in the Hilbert space of vector functions, in terms of boundary values at the endpoints ...
Zameddin I. Ismailov   +2 more
doaj  

Some Reverses of the Jensen Inequality for Functions of Selfadjoint Operators in Hilbert Spaces [PDF]

open access: yes, 2008
Some reverses of the Jensen inequality for functions of selfadjoint operators in Hilbert spaces under suitable assumptions for the involved operators are given.
Dragomir, Sever S
core   +2 more sources

Some Jensen's Type Inequalities for Twice Differentiable Functions of Selfadjoint Operators in Hilbert Spaces [PDF]

open access: yes, 2008
Some Jensen’s type inequalities for twice differentiable functions of selfadjoint operators in Hilbert spaces under suitable assumptions for the involved operators are given.
Dragomir, Sever S
core   +1 more source

Reversing the CBS-inequality for sequences of vectors in Hilbert spaces with applications (I) [PDF]

open access: yes, 2005
Several reverses for the Cauchy-Bunyakovsky-Schwarz (CBS) inequality for sequences of vectors in Hilbert spaces are obtained. Applications for bounding the distance to a finite-dimensional subspace and in reversing the generalised triangle inequality are
Dragomir, Sever S
core   +1 more source

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