Browsing Faculty of Science & Technology (FST) by Title
Now showing items 2781-2800 of 4283
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On unitary equivalence of some classes of operators in Hilbert spaces
(University of Nairobi, 2020)Abstract It is a well-known result in op erator theory that whenever two op erators are similar then they have equal sp ectra even though they do not have to belong to the same class of op erators. However ... -
On a Certain Transformation of Boltzmann Equation
(Department of Physics, University of Nairobi, 1974)An identical transformation of the Boltzmann equation leads directly to an equation of a purely stochastic process. A simple special case is obtained from the well-known formulae of neutron physics on the transition ... -
On a Zeuthen-type problem
(University of Nairobi, 2014) -
On A-Commuting Operators
(School of Mathematics, University of Nairobi,, 2012)Two bounded linear operators A and B on a complex Hilbert space are said to ,1.- commute for ,lEe provided that: AB = ABA. In this paper we look for some properties satisfied by the operators A and B so that ,1.= 1. It ... -
On almost similarity operator equivalence relation
(University of Nairobi, 2013-06) -
On An Almost Hermite Manifold
(1980) -
On Analysis And Synthesis Operators And Characterization Of The Synthesis Matrix Of A Frame In Terms Of The Frame Operator
(University of Nairobi, 2018)In this research paper we introduce the operators associated with a frame. That is the Analysis and the Synthesis Operators and their basic properties. The structure of matrix representation of the Synthesis operator is ... -
On commutants and operator equations
(School of Mathematics University of Nairobi, 2012)Let B(H) denote the algebra of bounded linear operators on a Hilbert Space H into itself. Given A,B ∈ B(H) define C(A,B) and R(A,B) : B(H) −→ B(H) by C(A,B)X = AX − XB and R(A,B)X = AXB − X. Our task in this note is to ... -
On Comparison of Local Polynomial Regression Estimators for P=0 and P=1 in a model based framework
(Canadian Center of Science and Education, 2018-07)This article discusses the local polynomial regression estimator for P=0 and the local polynomial regression estimator for P=1 in a finite population. The performance criterion exploited in this study focuses on the ... -
On improved estimation under additional information
(Taylor & FrancisDepartment of Mathematics University of Nairobi, 1988)An improvement of the ordinary least squares estimator of the regression vector in a univariate linear model is obtained. This is done by combining observed data with prior information and other additional information. ... -
On line determination of thermophysical properties in an absorption calorimeter
(University of Nairobi, 1997)A Microsoft FORTRAN 77 algorithm for calculation of the thermal absorptance and emittance of materials for solar photothermal applications is presented. It replaces the Mathematica software package used for an earlier paper ... -
On Local Linear Regression Estimation In Sampling Surveys
(2017-10)A model-based survey is employed to estimate the unknown values of the survey variable, using the local linear regression approach. In particular, a local linear regression estimator in model-based surveys is studied. ... -
On Local Linear Regression Estimation of Finite Population Totals in Model Based Surveys
(University of Nairobi, 2018)In this paper, nonparametric regression is employed which provides an estimation of unknown finite population totals. A robust estimator of finite population totals in model based inference is constructed using the procedure ... -
On maintainable grade structures in an educational system
(University of Nairobi.School of Mathematics, 1999) -
On Modelling and Pricing Rainfall Derivatives with Seasonality
(2011)We are interested in pricing rainfall options written on precipitation at specific locations. We assume the existence of a tradeable financial instrument in the market whose price process is affected by the quantity of ... -
On multi-type step-wise group screening designs
(The Allahabad mathematical society, 2002) -
On multistage group screening designs
(Department of mathematics, 2010)In this article we discuss multistage group screening in which group-factors contain differing number of factors. We describe a procedure for grouping the factors in the absence of concrete prior information, so that the ... -
On quasi-similarity and putnam-fuglede property of operators in Hilbert spaces
(University of Nairobi, 2014)The problem of finding conditions under which two given operators say A and B have equal spectra has been considered by several authors. In this paper we show that quasi-similar operators 𝐴 and 𝐵 which satisfy the Putnam- ...