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Effects of Structural Viscoelasticity in Non-Divergence free Deformable Porous Media with Incompressible Constituents
(Global Journal of Pure and Applied Mathematics, 2018)
In this paper, we investigate the importance of structural viscoelasticity in the mechanical
response of deformable porous media with incompressible constituents
under sudden changes in the external applied quasi-static ...
On the maximal numerical range of elementary operators
(Academic Publications, Ltd., 2017-02)
The notion of the numerical range has been generalized in different directions.
One such direction, is the maximal numerical range introduced by Stampfli (1970) to derive
an identity for the norm of a derivation on L(H). ...
On Numerical Range of Multiplication Operator
(International Journal of Mathematical Analysis, 2019)
Let H be an in nite dimensional complex Hilbert space and A;B 2 B(H)
where B(H) is the C -algebra of all bounded linear operators on H. Let
MAB : B(H) ! B(H) be a multiplication operator induced by A and B de-
ned ...
On the norm of elementary operator
(Scientific Research Publishing, 2014-07-07)
The norm of an elementary operator has been studied by many mathematicians. Varied results
have been established especially on the lower bound of this norm. Here, we attempt the same
problem for finite dimensional operators.
On the Numerical Range of a Generalized Derivation
(HIKARI Ltd,, 2017)
We examine the relationship between the numerical range of the
restriction of a generalized derivation to a norm ideal J and that of its
implementing elements.
Mathematics Subject Classi cation: 47A12; 47B47
Orthogonality of elementary operators in normed spaces and their applications
(SAMSA 2012 mathematics conference proceedings, 2012-11)
Malaria is a major public health concern, especially among
pregnant women and children under the age of five. It is a leading cause
of morbidity and mortality in Malawi, accounting for fourty percent
of out-patient ...
Deficiency indices and spectrum of fourth order difference equations with unbounded coefficients
(WILEY‐VCH Verlag, 2013-03)
Using subspace theory together with appropriate smoothness and decay conditions, we calculated the deficiency indices and absolutely continuous spectrum of fourth order difference equations with unbounded coefficients. In ...
A Functional Calculus for (α, α+ 1)− type R Operators
(Int. Journal of Math. Analysis,, 2010)
A closed densely defined operator H, on a Banach space X, whose
spectrum is contained in R and satisfies
(z − H)−1
≤ c
z α
| z|β
∀ z ∈ R with z α :=
|z|2 + 1 (1)
for some α , β ≥ 0; c > 0, is said to ...
Aspects of (pq) summing multipliers
(Vdm verlag Dr. Muller aktiengeselischaft & co. kg., 2010)
A sequence (uj)j2N of operators in L(X; Y ) is a (p; q)-summing multi-
plier (or (p; q)-summing sequence of operators), in short (uj) 2 `¼p;q (X; Y ), if there
exists a constant C > 0 such that, for any ¯nite collection ...
Norms of Inner Derivations on Norm ideals
(Int. Journal of Math. Analysis, 2010)
Let B(H) be the algebra of bounded linear operators on a Hilbert
space H and J be a norm ideal in B(H). We investigate the relationship
between the diameter of the numerical range of an operator A ∈ B(H)
and the norm ...