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Browsing Department of Mathematics by Title

Browsing Department of Mathematics by Title

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  • KBM Asymptotic Method for third order Nonlinear Oscillations 
    Alam, Md. Shamsul (University of Rajshahi, 2000)
    In most treatments or nonlinear oscillations hy perturbation method. only periodic oscillations are treated; transients are not considered. Krylov and Bogoliubov have used a perturbation method to discuss transients in the ...
  • N-Ideals of a Lattice 
    Latif, Md. Abdul (University of Rajshahi, 1994)
    This thesis studies the nature of n-ideals of a lattice. The topic arose out of a study on the kernels, around a particular element n, of a skeletal congruence on a distributive lattice. The idea of n-ideals in a lattice ...
  • New Approximate Solution of Non-Linear Differential Systems 
    Pervin, Mst. Razia (University of Rajshahi, 2014)
    Most of the perturbation methods are developed to find periodic solutions of nonlinear systems; transients are not considered. At first, Krylov and Bogoliubov introduced a perturbation method which is well known as “asymptotic ...
  • On Connectedness Concepts in Fuzzy Topological Spaces 
    Shayid, Md.Abu (University of Rajshahi, 2013)
    The goal of the thesis is to find out some new connectedness concepts in fuzzy topological spaces. Some concepts of connectedness in fuzzy topological spaces that already exist in the literature are recalled here also. In ...
  • 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 ...
  • On Fuzzy Compactness 
    Talukder, Md. Abdul Mottalib (University of Rajshahi, 2015)
    The fundamental concept of a fuzzy set and fuzzy set operations was first introduced by L. A. Zadeh [175] in 1965 and it provides a natural foundation for treating mathematically the fuzzy phenomena, which exists pervasively ...
  • On Generalizations of Separation properties, Compactness and Connectedness 
    Biswas, Sanjoy Kumar (University of Rajshahi, Rajshahi, 2019)
    The thesis is concerned with generalizations of some important and interesting properties of separation, compactness and connectedness in a span of seven chapters. In the first chapter pseudo regular and pseudo normal ...
  • On Generalizations of Separation Properties, Compactness and Connectedness 
    Biswas, Sanjoy Kumar (University of Rajshahi, 2019)
    The thesis is concerned with generalizations of some important and interesting properties of separation, compactness and connectedness in a span of seven chapters. In the first chapter pseudo regular and pseudo normal ...
  • 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 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 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 ...
  • On Some Aspects of Topology 
    Das, Swapan Kumar (University of Rajshahi, 2014)
    A topological space is a non-empty set X together with a collection T of subsets of X satisfying the conditions: (i) X, T, (ii) the union of any class of sets in T belongs to T, (iii) The intersection ...
  • 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 ...
  • 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 ...
  • Quantum Effects of Black Holes 
    SULTANA, KAUSARI (University of Rajshahi, 2014)
    We study quantum mechanical aspect of black holes. We give a brief re view of black hole radiation which is commonly called Hawking radiation. So far several different methods have been employed to investigate this radiation ...
  • Quantum Gravity in Curved Space-Time of General Relativity 
    Mondal, Asit Kumar (University of Rajshahi, 1993)
    The main contents of this thesis may be briefly summarized as follows: Chapter 1 contains a brief account of the Plebonski space­time . We specify there the various spacial class of spacetimes covered by the Plebanski ...
  • Sectionally Pseudocomplemented Distributive Nearlattices 
    Islam, A. K. M. Sirajul (University of Rajshahi, 1998)
    This thesis studies the nature of a sectionally pseudocomplemented distributive nearlattice. By a nearlattice S we will always mean a meet semilattice together with the property th9.t any two elements possessing a common ...
  • 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 ...
  • Separation Axioms in Intuitionistic Fuzzy Topological Spaces 
    Ahmed, Estiaq (University of Rajshahi, 2015)
    In 1965, Zadeh[150] introduced to the world the term fuzzy set(FS), as a formalization of vagueness and partial truth, and represents a degree of membership for each member of the universe of discourse to a subset of it. ...

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