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Now showing items 11-20 of 41
On necessary Conditions for scalars
(Hikari Ltd, 2014)
In this paper, we give a characterization of scalar operators. In particular we show that a densely defined closed linear operator H acting on a reflexive Banach space X is scalar if it is of (0, 1) type R and f (H)≤ f∞ ...
Finite Solvable Groups with 4-Regular Prime Graphs
(African Institute for Mathematical Sciences, Master Thesis, 2013-05-23)
In this research project, we seek to address the problem of deciding which nite simple graph is a
prime graph of a nite group. In particular, we only focus on showing which 4-regular graphs can be
prime graphs of some ...
Spectral analysis of certain groups of isometries on Hardy and Bergman spaces
(Academic Press, 2017-12-15)
Using the similarity theory of semigroups as well as spectral theory, we obtain the resolvents of the generators of strongly continuous groups of isometries on the Hardy and Bergman spaces. These groups are obtained as ...
Some Properties of the Essential Numerical Range on Banach Spaces
(HIKARI Ltd,, 2017)
We study the properties of the essential algebraic numerical range as
well as the essential spatial numerical range for Banach space operators.
Mathematics Subject Classi cation: 47A10; 47A05; 47A53
4-Regular prime graphs of nonsolvable groups
(CORNELL UNIVERSITY, 2019-01-11)
Let G be a finite group and cd(G) denote the character degree
set for G. The prime graph ∆(G) is a simple graph whose vertex set consists
of prime divisors of elements in cd(G), denoted ρ(G). Two primes p, q ∈
ρ(G) are ...
A Probabilistic Estimation of the Basic Reproduction Number: A Case of Control Strategy of Pneumonia
(cience Publishing Group, 2014)
Deterministic models have been used in the past to understand the epidemiology of infectious diseases, most importantly to estimate the basic reproduction number, Ro by using disease parameters. However, the approach ...
Parameter Driven Dynamics of Trypanosomiasis in a Cattle Population
(HIKARI Ltd, 2014)
In this paper we study the disease dynamics of trypanosomiasis in a
cattle population. The compartmental model presented includes the
wild animal population which provides an alternative feeding source
for the tsetse ...
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 ...