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Browsing Department of Mathematics by Title

Browsing Department of Mathematics by Title

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  • Paul O Oleche, Naftali O Ongati, John O Agure (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 self-adjoint. So ...
  • Shem Aywa, JO Agure, W Rao (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 ...
  • Okoth Isaac Owino (Maseno University, 2010)
  • S Ballamoole, JO Bonyo, TL Miller, VG Miller (Springer International Publishing, 2016-01-01)
    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 ...
  • Isaac Owino Okoth (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 ...
  • Isaac Owino Okoth (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 ...
  • 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 ...
  • Wilfred Omwansa Peter Omari Magati, Jacob K. Kibwage, Seth Gor Omondi, George Ruigu (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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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, ...
  • 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 ...
  • 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 ...
  • 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 ...

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