Browsing Department of Mathematics by Title
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4Regular prime graphs of nonsolvable groups
(CORNELL UNIVERSITY, 20190111)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 ... 
The algebra of smooth functions of rapid descent
(JOOUST, 2009)A bounded operator with the spectrum lying in a compact set V ⊂ R, has C∞(V ) functional calculus. On the other hand, an operator H acting on a Hilbert space H, admits a C(R) functional calculus if H is selfadjoint. So ... 
Application of binary logistic regression model: determinants of contraceptive utilization.
(IJRAR, 2020)Contraceptives uptake among the youth has been a sensitive and controversial issue in the society that has resulted to various social problems that include unwanted pregnancies and sexual transmitted infections among ... 
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 ... 
Bijections for classes of labelled trees
(University of Isfahan, 20240109)Trees are acyclic connected graphs. Plane trees, dary trees, binary trees, non crossing trees and their generalizations, which are families of trees, have been enumerated by many authors using various statistics. These ... 
Bijections for classes of labelled trees.
(University of Isfahan, 20240901)Trees are acyclic connected graphs. Plane trees, dary trees, binary trees, noncrossing trees and their generalizations, which are families of trees, have been enumerated by many authors using various statistics. These ... 
Bijections of kplane trees
(Open journal of discrete Applied Mathematics, 2022)A kplane tree is a tree drawn in the plane such that the vertices are labeled by integers in the set {1, 2, . . . , k}, the children of all vertices are ordered, and if (i, j) is an edge in the tree, where i and j are ... 
Bijections of plane Husimi graphs and certain combinatorial structures
(EU Academic Publishers, 20231019)Plane Husimi graphs are combinatorial structures obtained when we replace edges in plane trees with complete graphs such that the resultant structures are connected and cycle free. The formula that counts these structures ... 
BLOCK QUIVERS AND THEIR MUTATIONS
(Maseno University, 2010) 
Cesárolike operators on the Hardy and Bergman spaces of the half plane
(Springer International Publishing, 20160101)We construct integral operators associated with strongly continuous groups of invertible isometries on the Hardy spaces and the weighted Bergman spaces of the upper half plane. Specifically, we obtain the spectrum and point ... 
Combinatorics of oriented trees and treelike 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 ... 
Combinatorics of oriented trees and treelike 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 in degree ... 
Comparative Analysis of Spectral Theory of Second Order Difference and Differential Operators with Unbounded Odd Coefficient
(KYUNGPOOK, 2020)We show that selfadjoint operator extensions of minimal second order differ ence operators have only discrete spectrum when the odd order coefficient is unbounded but grows or decays according to specific conditions. ... 
Consistency Inference Property of QIC in Selecting the True Working Correlation Structure for Generalized Estimating Equations
(Science Publishing Group, 20190629)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 ... 
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 ... 
Deficiency indices and spectrum of fourth order difference equations with unbounded coefficients
(WILEY‐VCH Verlag, 201303)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 ... 
Effects of inclination angle and free convection on velocity profile for a steady 2dimensional magnetohydrodynamic fluid flow in an inclined cylindrical pipe
(European Journal of Engineering and Technology Research, 2021)Effects of inclination and free convection on velocity profile for magnetohydrodynamic (MHD) fluid flow in an inclined cylindrical pipe has been investigated. The governing partial differential equations are the equations ... 
Effects of Structural Viscoelasticity in NonDivergence 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 quasistatic ... 
Enumeration of plane and dary treelike structures
(Annals of Mathematics and Computer Science, 20230826)Trees are generalized using various approaches such as considering treelike structures. Some of the treelike structures are Husimi graphs, cacti and oriented cacti. These graphs have been enumerated according to number ... 
Farmer versus Researcher data collection methodologies: Understanding variations and associated tradeoffs
(2019)The number of nonexperts (such as farmers) participating in research activities has increased over the years, with the aim of them addressing their heterogeneous conditions. The situation has resulted in them being ...