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Browsing Department of Mathematics by Issue Date

Browsing Department of Mathematics by Issue Date

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  • Investigation of Some Aspects of Protoplanetary Model of Planetary Formation 
    Paul, Gour Chandra (University of Rajshahi, 2005)
    In this thesis we have investigated some aspects of the protoplanetary theory of planetary formation, namely, the structure of a protoplanet, sedimentation of heavy elements in a protoplanet, and the effect of mass loss ...
  • On Some New Approximate Solutions of Fourth Order Nonlinear Differential Equations 
    Akbar, Md. Ali (University of Rajshahi, 2005)
    Most of the perturbation methods are developed to find periodic solutions of nonlinear systems; transients are not considered. First Krylov and BogoLiubov introduced a perturbation method to discuss the transients in the ...
  • On Some Universal Constructions for Fuzzy Topological Spaces 
    Rashid, Mohammed Harunor (University of Rajshahi, 2005)
    In this work, many known universal objects such as products, equalizers, pullbacks and their duals, namely, coproducts, coequalizers and pushouts for fuzzy topological spaces are studied in detail. Another known concept ...
  • Structure of an initial n1ain sequence star of 1nixed opacity with negligible abundance of heavy ele1nents and studies of so1ne young clusters 
    Pramanik, Jogendra Nath (University of Rajshahi, 2005)
    In this thesis we have investigated some aspects of stellar structure and evolution. The thesis is divided into two sections. Section I deals with the structure of a star while section 2 deals with stu.J.y .. of some young ...
  • Investigation of some aspects of protoplanetary model of planetary formation 
    Paul, Gour Chandra (University of Rajshahi, 2005)
    In this thesis we have investigated some aspects of the protoplanetary theory of planetary formation, namely, the structure of a protoplanet, sedimentation of heavy elements in a protoplanet, and the effect of mass loss ...
  • On Principal n-ideals of a Distributive nearlattice 
    Raihan, Md. Sazuwar (University of Rajshahi, 2006)
    This thesis studies some of the nature of Principal n-ideal of a distributive near lattice. The n-ideals of a lattice have been studied by several authors including [4] and [36]. For a fixed element n of a lattice L, a ...
  • On Finitely Generated n-ldeals of a Nearlattice 
    Rahman, Md. Mizanur (University of Rajshahi, 2006)
    The thesis studies extensively the nature of finitely generated n-ideals of a near lattice. Many authors including [1], [34] and [35] have studied about n-ideals of a lattice. A convex sublattice containing a fixed element ...
  • Study of Structures in Some Branches of Mathematics 
    Hossain, Mohd. Altab (University of Rajshahi, 2006)
    Classification is a deep and fundamental problem in every branch of Mathematics. Although an uphill task, this target has been achieved in a number of cases in different fields. In general, the strategy for this grand ...
  • Study of Sums and Products in Some Branches of Mathematics 
    Dey, Kalyan Kumar (University of Rajshahi, 2006)
    In many branches of Mathematics, a strategy for study of the mathematical entities is to view them as being made up of simpler entities in one or more ways. The task is then divided into two parts: (i) identifying and ...
  • Study of Some Properties of Topological Spaces and of Their Generalisations 
    Mitra, Mallika (University of Rajshahi, 2006)
    The various topological concepts and properties like openness, closedness, continuity, compactness, connectedness etc. have been generalised by mathematicians. In this thesis we have studied these generalisations and made ...
  • Characterizations of Some Radical Rings and Gamma Rings 
    Rashid, Md. Mahbubur (University of Rajshahi, 2006)
    The present thesis entitled "Characterizations of Some Radical Rings and Gamma Rings" is the outcome of the research by me under the supervision of Dr. A. C. Paul, Professor, Department of Mathematics, University of Rajshahi. ...
  • Damped Forced Vibration of Some Quasi-Linear Differential Systems 
    Dey, Pinakee (University of Rajshahi, 2008)
    There are many approaches for approximating solutions of nonlinear vibrating problems. The most common methods for constructing approximate analytical solutions to the nonlinear vibrating problems are the perturbation ...
  • A Study on Oxygen Diffusion Through Living Tissues 
    Malek, Abdul (University of Rajshahi, 2009)
    A theoretical study of oxygen diffusion process through living tissues and its various consequences have been presented. In this aspect we have reviewed some physiological terms and fundamental lows of diffusion. A ...
  • Analysis of Viscous Incompressible Fluid Flows and Heat Transfer 
    Uddin, Md. Sharif (University of Rajshahi, 2010)
    We first present a brief ideas and principles in "Fluid Mechanics" which may serve as the background materials of viscous, incompressible laminar Newtonian or non-Newtonian fluid flow problems considered in the present ...
  • Study On Some Problems of Non-Newtonian Fluid Mechanics 
    Hossain, Md. Aslam (University of Rajshahi, 2010)
    This is an elaborate discussion of main theme ideas and the condition in "Fluid mechanics", which help us to realized a clear concept of the background and elements of various viscous Newtonian and non-Newtonian flow ...
  • Semilattices with a Partial Binary Operation 
    Begum, Shamsun Naher (University of Rajshahi, 2010)
    This thesis Centre’s on a class of certain pseudo complemented partial lattices. This partial lattice is said to be a JP-semilattice. An algebraic structure S = (S, /\, V), where (S, /\) is a semilattice and V is a partial ...
  • On Some Approximate Solutions of Nonlinear Physical and Biological Problems 
    Uddin, Md. Alhaz (University of Rajshahi, 2010)
    Most of the perturbation methods are developed to find the periodic solutions of nonlinear systems with small nonlinearities, transients are not considered. In 1947, first Russian scientists Krylov and Bogo Liubov introduced ...
  • Studies of Spinning Particles in Curved Spacetimes 
    Banu, Akhtara (University of Rajshahi, 2010)
    We investigate the motion of spinning particles, such as Dirac fermions, in curved spacetimes by pseudo-classical mechanics models in which the spin degrees of freedom are characterized in terms of anti-commuting Grassmann ...
  • On Ro and R1 Properties in Fuzzy Topological Spaces 
    Azam, S. M. Faqruddin Ali (University of Rajshahi, 2011)
    The goal of this thesis is to find out some new R1 -concepts for fuzzy topological spaces. Besides some concepts of fuzzy R0, R1, T0, T1, T2 and regular topological spaces that are already existing in the literature are ...
  • On Supra Fuzzy Topological Spaces 
    Hoque, Md. Fazlul (University of Rajshahi, 2011)
    The fundamental concept of a fuzzy set was introduced by L. A. Zadeh [111] in 1965 to provide a foundation for the development of many areas of knowledge. Consequently, this provides a natural frame work for generalizing ...

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