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Now showing items 21-30 of 38
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 ...
Norm of a derivation and hyponormal operators
(Int J Math Anal, 2010)
We characterize when the norm of inner derivation on a norm ideal
equals that on the quotient algebra. We further investigate norms of
inner derivations implemented by normal and hyponormal operators on
norm ...
A cost - benefit analysis of substituting bamboo for tobacco: a case study of smallholder tobacco farmers in south Nyanza, Kenya
(Science Journal Publication, 2012)
This study examined the economic and financial benefits and costs of
farming bamboo as a crop substitute of tobacco in four (4) districts in South
Nyanza, Kenya. The World Health Organization Framework Convention on ...
Combinatorics of oriented trees and tree-like structures
(Stellenbosch University, 2015)
In this thesis, a number of combinatorial objects are enumerated. Du and
Yin as well as Shin and Zeng (by a different approach) proved an elegant
formula for the number of labelled trees with respect to a given ...
Consistency Inference Property of QIC in Selecting the True Working Correlation Structure for Generalized Estimating Equations
(Science Publishing Group, 2019-06-29)
Abstract: The generalized estimating equations (GEE) is one of the statistical approaches for the analysis of longitudinal
data with correlated response. A working correlation structure for the repeated measures of the ...