SIMC 2017: Recent submissions
Now showing items 2140 of 85

Evidencebased technology to enhance mathematics education from Iceland to Kenya
(Strathmore University, 2017)Enhancing the mathematics classroom using computerised drills for homework is shown to provide considerable benefits for student learning in diverse regions, from hightech westerns classrooms to those with neither Internet ... 
Modeling of SME credit ratings using nonhomogenous backward semi Markovian approach
(Strathmore University, 2017)This study seeks to understand the transition dynamics of credit ratings for Small and Medium Enterprises in Kenya using a nonhomogenous backward SemiMarkov approach. In modeling credit risk, this approach takes into ... 
Risk measures and portfolio optimization in the Kenyan stock market
(Strathmore University, 2017)This study seeks to establish optimal stock portfolios to be held by investors in The Nairobi Securities Exchange (NSE) from 1998 – 2016 using the Mean Variance and Threshold Accepting optimization mod els.A comparison ... 
An Empirical performances comparison of metaheuristic algorithms for school bus routing problem
(Strathmore University, 2017)School Bus Routing Problem is an NPhard Combinatorial Optimization problem, and hence solving the School Bus Routing Problem, requires the application of one or more of the metaheuristic algorithms. This work presents a ... 
Statistical techniques for characterizing cloud workloads: a survey
(Strathmore University, 2017)Cloud computing infrastructure is becoming indispensable in modern IT. Understanding the behavior and resource demands of cloud application workloads is key in data center capacity planning, cloud infrastructure testing, ... 
The Squares of numbers using Komozian series
(Strathmore University, 2017)In this paper we have determined the squares of numbers using the Komozian series. The method has established series which analyses the digits present in a given number and sets priority for every digit depending on its ... 
Rational homotopy type of the component of inclusion in the nthspace of continuous mappings from Gr (k, n) to Gr(k, n + 1)
(Strathmore University, 2017)A complex manifold can be embedded in some complex projective space CP (N ), in particular, the Grassmann manifold Gr(n, k) of k dimensional subspaces in Cn can bembedded in some complex projective space CP (N ).Moreover ... 
Certain properties of the essential spectra in Banach spaces
(Strathmore University, 2017)Let X be an arbitrary Banach space, and L (X) be the set of all bounded linear operators on X. We apply closed range theorem to determine some duality properties of the essential spectrum on L(X). Specifically, we introduce ... 
Finite rings with homocyclic $p$groups as Sylow $p$subgroups of the group of units
(Strathmore University, 2017)In 1960, Laszlo Fuchs posed, among other problems, the following: characterize the groups which are the groups of all units in a commutative and associative ring with identity. Though this problem still remains open, ... 
On joint essential maximal numerical ranges
(Strathmore University, 2017)The study of numerical range of an operator has been an area of intense research. The motivation for the development arose from the classical theory of quadratic forms. It forms a very important aspect in functional analysis, ... 
On aselfadjoint, aunitary opeators and quasiaffinities
(Strathmore University, 2017)In this paper, we investigate properties of Aself adjoint operators and other relations on Hilbert spaces. In this context, A is a selfadjoint and an invertible operator. More results on operator equivalences including ... 
On the Banach algebra numerical range
(Strathmore University, 2017)Let A denote a unital Banach algebra and SA denote its unit sphere. It was proved by F. F. Bonsall and J. Duncan that when the Banach algebra is unital, the algebra numerical range is identical to a subset of itself. Basing ... 
GDD (n1, n, n + 1, 4; λ1, λ2) for n1 = 1 or 2
(Strathmore University, 2017)The main subject matter for this paper is GDDs with three groups of sizes 1, n, (n≥ 2) and n + 1, respectively, and block size four. A block has Configuration (1, 1, 2), means the block has the point from the group of size ... 
Metric equivalence as an almost similarity property
(Strathmore University, 2017)Various results that relate to almost similarity and other classes of operators such as isometry, normal, unitary and compact operators have been extensively discussed. It has been shown that if operators S and T are ... 
Matrix completion problem
(Strathmore University, 2017)A real n n matrix is a nonnegative P0matrix if its principal minors are nonnegative and all its entriesare nonnegative. A digraph D is said to have nonnegative P0matrix completion if every partial nonnegative P0matrix ... 
On the negative eigenvalues of twodimensional Schro¨dinger operators with singular potentials
(Strathmore University, 2017)In this paper quantitative upper estimates for the number of negative eigenvalues of a two dimensional Schro¨dinger operator with potential supported by an unbounded Lipschitz curve are presented. The estimates are given ... 
On compact power operators whose norms are eigenvalues
(Strathmore University, 2017)The class of compact operators is fundamental in operator theory. Characterization of compact operators acting on different spaces has been fascinating to many Mathematicians. Many properties such as boundedness, completeness, ... 
On the Banach algebra numerical range
(Strathmore University, 2017)Let A denote a unital Banach algebra and SA denote its unit sphere. It was proved by F. F. Bonsalland J. Duncan that when the Banach algebra is unital, the algebra numerical rangeis identical to a subset of itself. Basing ... 
Perturbation theory of differential operators
(Strathmore University, 2017)Suppose that M and S are differential operators and T is given by T = MzS, where z is the spectral parameter. Here, we give the necessary and sufficient conditions for the deficiency indices and spectral properties of ... 
On one nonclassical problem for the Laplace equation
(Strathmore University, 2017)Nonlocal problems received special attention over the past few decades due to efficient descriptions of various phenomena in physics, chemistry and engineering in cases when data from the boundary of the process or initial ...