Now showing items 41-60 of 69

    • On Numerical Range of Multiplication Operator 

      Odero Adhiambo Beatrice, JO Agure, FO Nyamwala (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 ...
    • Farmer versus Researcher data collection methodologies: Understanding variations and associated trade-offs 

      Hannington Ochieng1, 2* , John Ojiem1 , Joyce Otieno2 (2019)
      The number of non-experts (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 ...
    • On the Norm of a Generalized Derivation 

      Odero Adhiambo Beatrice, J. O. Agure,F. O. Nyamwala (HIKARI Ltd, 2019)
      Let H be an infinite dimensional complex Hilbert space and B(H) the algebra of all bounded linear operators on H. For two bounded operators A, B ∈ B(H), the map δAB : B(H) → B(H) is a generalized inner derivation operator ...
    • 4-Regular prime graphs of nonsolvable groups 

      Donnie Munyao Kasyoki, Paul Odhiambo Oleche (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 ...
    • Consistency Inference Property of QIC in Selecting the True Working Correlation Structure for Generalized Estimating Equations 

      obert Nyamao Nyabwanga, Fredrick Onyango, Edgar Ouko Otumba (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 ...
    • Influence of Teacher’s Perception of in-Service Program on Quality of Teaching Mathematics 

      Sylvia Awuor Manoah , Francis C. Indoshi , Lucas A. Othuon (International Journal of Innovative Research and Development, 2020)
      Pre-service training is not adequate to last teachers for their entire career. Due to advancement in knowledge, technology and curriculum, teachers ought to update on teaching methodologies through In-service Education and ...
    • On Generalized Fibonacci Numbers 

      Fidel Ochieng Oduol, Isaac Owino Okoth (Communications in Advanced Mathematical Sciences, 2020)
      Fibonacci numbers and their polynomials have been generalized mainly by two ways: by maintaining the recurrence relation and varying the initial conditions, and by varying the recurrence relation and maintaining the initial ...
    • Models for Level Premiums Payable to Benevolent Funds 

      Chora Damary Rehema, Fredrick Onyango, Joshua Were (Applied Mathematical Sciences, 2020)
      The application of multiple life actuarial calculations have been stud ied by many authours for instance Elizondo [3] studied the construction of multiple decrement models from associated single decrement expe riences.He ...
    • On some properties of generalized Fibonacci polynomials 

      Fidel Oduol (Open Journal of Discrete Applied Mathematics, 2020)
      Fibonacci polynomials have been generalized mainly by two ways: by maintaining the recurrence relation and varying the initial conditions and by varying the recurrence relation and maintaining the initial conditions. In ...
    • NOTIONS OF CONTINUITY FOR FINITE RANK MAPS IN THE SPACE OF NORMAL OPERATORS 

      J. A. OTIENO1 , D. O. AMBOGO, AND F. O. NYAMWALA (2020)
      We show that a natural extension of a continuous finite rank operator to an arbitrary Hilbert space is continuous. We also give sufficient conditions to calculate delta- epsilon numbers in all the domains of T. In addition, we ...
    • Comparative Analysis of Spectral Theory of Second Order Difference and Differential Operators with Unbounded Odd Coefficient 

      Fredrick Oluoch Nyamwala, David Otieno Ambogo, Joyce Mukhwana Ngala (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. ...
    • Spectra of Composition Groups on the Weighted Dirichlet Space of the Upper Half-Plane 

      M. O. Agwang & J. O. Bonyo (Springer, 2020)
      We prove that the group of weighted composition operators induced by contin uous automorphism groups of the upper half plane U is strongly continuous on the weighted Dirichlet space of U, Dα(U). Further, we investigate ...
    • Norm Properties of S -Universal Operators 

      MUHOLO Joshua, BONYO,Job (Communications in Advanced Mathematical Sciences, 2020)
      We investigate the norm properties of a generalized derivation on a norm ideal J in B(H), the algebra of bounded linear operators on a Hilbert space H. Specifically, we extend the concept of S−universality from the inner ...
    • Application of binary logistic regression model: determinants of contraceptive utilization. 

      Caleb Okeyo Oyala (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 ...
    • Fitting Time-series Models to Kisumu Rainfall Data for the Period 1961-2014 

      Mawora Thomas Mwakudisa, Edgar Ouko Otumba, Joyce Akinyi Otieno (Science Publishing Group, 2020-02-20)
      Abstract: Many small-scale farmers require adequate forecasts to help them plan for the rainfall. The National Meteorological Service provides forecasts seasonally, monthly and weekly. The forecasts are qualitative in ...
    • Weighted Composition Groups on the Little Bloch Space 

      SB Mose, JO Bonyo (Hindawi, 2020-04-29)
      We determine both the semigroup and spectral properties of a group of weighted composition operators on the little Bloch space. It turns out that these are strongly continuous groups of invertible isometries on the Bloch ...
    • Spatial Comparison and Quality Check of Farmer-recorded Daily Rainfall Data; A Case of Nyakach and Soyain-sigowett, Ken 

      awora Thomas Mwakudisa, Edgar Ouko Otumba, Joyce Akinyi Otieno (Science Publishing Group, 2020-09-01)
      Abstract: Small scale farming is currently still heavily dependent on rainfall in developing nations. With the challenge of climate change, many innovations are proposed to help the farmers mitigate and adapt. The use of ...
    • Velocity Profile for Magnetohydrodynamic Flow in Straight Horizontal Elliptical Pipe 

      David Kweyu, A. Wanyama Manyonge,K. Jacob Bitok (Applied Mathematical Sciences, 2021)
      Velocity profile for Magnetohydrodynamic (MHD) fluid flow in a straight long pipe with elliptical cross section has been investigated. Governing equations are partial differential equations comprising Ohm’s law of ...
    • Effects of inclination angle and free convection on velocity profile for a steady 2-dimensional magnetohydrodynamic fluid flow in an inclined cylindrical pipe 

      B Odongo, R Opiyo, A Manyonge (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 ...
    • On Noncrossing and Plane Tree-Like Structures 

      Isaac Owino Okoth (Communications in Advanced Mathematical Sciences, 2021)
      Mathematical trees are connected graphs without cycles, loops and multiple edges. Various trees such as Cayley trees, plane trees, binary trees, d-ary trees, noncrossing trees among others have been studied extensively. ...