Browsing Department of Mathematics by Title

Now showing items 15-34 of 69

    • Deficiency indices and spectrum of fourth order difference equations with unbounded coefficients 

      John Ogonji Agure, David Otieno Ambogo, Fredrick Oluoch Nyamwala (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 ...

    • 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 ...

    • Effects of Structural Viscoelasticity in Non-Divergence free Deformable Porous Media with Incompressible Constituents 

      Micheal Babatunde Oguntola, Mathew Ngugi Kinyanjui, John Agure Ogonji (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 ...

    • Enumeration of plane and d-ary tree-like structures 

      Onyango, Christopher Amolo; Okoth, Isaac Owino; Kasyoki, Donnie Munyao (Annals of Mathematics and Computer Science, 2023-08-26)
      Trees are generalized using various approaches such as considering tree-like structures. Some of the tree-like 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 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 ...

    • Finite Solvable Groups with 4-Regular Prime Graphs 

      Donnie Munyao Kasyoki (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 ...

    • 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 ...

    • A Functional Calculus for (α, α+ 1)− type R Operators 

      Paul O Oleche, John O Agure (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 ...

    • Groups of isometries associated with automorphisms of the half-plane 

      Job Otieno Bonyo (Mississippi State University, 2015)
      The study of integral operators on spaces of analytic functions has been considered for the past few decades. However, most of the studies in this line are based on spaces of analytic functions of the unit disc. For the ...

    • Incremental Modernization of Statistics Teaching and Curriculum at Maseno University, Kenya 

      Omolo N Ongati, John Ogonji Agure and Betty Ogange (International Association of Statistical Education, 2010)
      Modernisation of statistics teaching is a continual problem the world over. The advances in statistical methods and tools along with the growing demand of applied practitioners creates a dual need of people with 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 ...

    • Locally oriented noncrossing trees 

      Isaac Owino Okoth, Stephan Wagner (2015)
      We de ne an orientation on the edges of a noncrossing tree induced by the labels: for a noncrossing tree (i.e., the edges do not cross) with vertices 1; 2; : : : ; n arranged on a circle in this order, all edges are ...

    • Mathematical Model for Pneumonia Dynamics with Carriers 

      Mugisha Joseph Ong’ala Jacob Otieno, Oleche Paul (2013)
      There are major advances which have been made to understand the epidemiology of infectious diseases. However, more than 2 million children in the developing countries still die from pneumonia each year. The efforts to ...

    • 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 ...

    • Norm estimates for convexoid operators 

      Cecil Onyango, Paul Oleche, Bernad N Okelo (JOOUST, 2015-06-24)
      Hilbert space operators are important in formulation of principles of quantum mechanics and also in other fields of applied sciences. These operators include normal operators, hyponormal operators, normaloid operators, ...

    • Norm of a derivation and hyponormal operators 

      JO Bonyo, JO Agure (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 ...

    • 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 ...

    • Norms of Derivations Implemented by S-Universal Operators 

      JO Bonyo, JO Agure (International Journal of Mathematical Analysis, 2011)
      Let H be a complex Hilbert space and B(H) the algebra of all bounded linear operators on H. For A, B ∈ B(H), we define inner derivations implemented by A,B respectively on B(H) by ΔA(X) = AX−XA, ΔB(X) = BX−XB and a ...

    • Norms of Inner Derivations on Norm ideals 

      JO Bonyo, JO Agure (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 ...

    • 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 ...