Browsing FEF  Makale Koleksiyonu  Matematik Bölümü / Department of Mathematics by Title
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Semiregular trees with minimal Laplacian spectral radius
(Elsevier Inc, 20100415)A semiregular tree is a tree where all nonpendant vertices have the same degree. Among all semiregular trees with fixed order and degree, a graph with minimal (adjacency/Laplacian) spectral radius is a caterpillar. Counter ... 
Solitary waves in a fluidfilled thin elastic tube with variable crosssection
(Elsevier B.V, 200708)The present work treats the arteries as a thin walled prestressed elastic tube with variable crosssection and uses the longwave approximation to study the propagation of weakly nonlinear waves in such a fluidfilled elastic ... 
Solitary waves in a tapered prestressed fluidfilled elastic tube
(Birkhauser Verlag Ag, 200403)In the present work, treating the arteries as a tapered, thin walled, long and circularly conical prestressed elastic tube and using the longwave approximation, we have studied the propagation of weakly nonlinear waves in ... 
Solitary waves in elastic tubes filled with a layered fluid
(PergamonElsevier Science, 200104)In this work, we studied the propagation of weakly nonlinear waves in a prestressed thin elastic tube filled with an incompressible layered fluid, where the outer layer is assumed to be inviscid whereas the cylindrical ... 
Solitary waves in fluidfilled elastic tubes: weakly dispersive case
(PergamonElsevier Science, 200103)In the present work, employing the nonlinear equations of an incompressible, isotropic and elastic thin tube and the approximate equations of an incompressible inviscid fluid, the propagation of weakly nonlinear waves, in ... 
Some inequalities which hold for starlike logharmonic mappings of order alpha
(Eudoxus Press, LLC., 201404)Let H(D) be the linear space of all analytic functions defined on the open disc D = {z vertical bar vertical bar z vertical bar < 1}. A logharmonic mappings is a solution of the nonlinear elliptic partial differential ... 
Some notes on spectra of cographs
(CHARLES BABBAGE RES CTR, 201107)A cograph is a P4free graph. We first give a short proof of the fact that 0 (1) belongs to the spectrum of a connected cograph (with at least two vertices) if and only if it contains duplicate (resp. coduplicate) vertices. ... 
Some properties concerning closetoconvexity of certain analytic functions
(SPRINGER INTERNATIONAL PUBLISHING AG, 2012)Let f(z) be an analytic function in the open unit disk D normalized with f(0) = 0 and f'(0) = 1. With the help of subordinations, for convex functions f(z) in D, the order of closetoconvexity for f(z) is discussed with ... 
Some properties of starlike harmonic mappings
(SPRINGER INTERNATIONAL PUBLISHING AG, 2012)A fundamental result of this paper shows that the transformation F=az(h(z+a/1+(a) over barz) + /(h(a) + <(g(a))over bar>(z + a) (1 + (a) over barz) defines a function in S0 HS* whenever f = h( z) + g( z) is S0 HS*, andwewill ... 
Some results on a starlike logharmonic mapping of order alpha
(ELSEVIER SCIENCE BV, 20140115)Let H(D) be the linear space of all analytic functions defined on the open unit disc D = z is an element of C : vertical bar z vertical bar < 1. A sense preserving logharmonic mapping is the solution of the nonlinear ... 
Spacelike Rotational Surfaces of Elliptic, Hyperbolic and Parabolic Types in Minkowski Space E1(4) with Pointwise 1Type Gauss Map
(SPRINGER, 201406)In this paper, we consider a class of spacelike rotational surfaces in Minkowski space E1(4) with 2dimensional axis. There are three types of rotational surfaces with 2dimensional axis, called rotational surfaces of ... 
Stability of solitary waves for threecoupled long waveshort wave interaction equations
(OXFORD UNIV PRESS, 201108)In this paper, we consider a threecomponent system of 1D long waveshort wave interaction equations. The system has twoparameter family of solitary wave solutions. We prove orbital stability of the solitary wave solutions ... 
Standing waves for a generalized DaveyStewartson system
(IOP Publishing, 20061027)In this paper, we establish the existence of nontrivial solutions for a semilinear elliptic partial differential equation with a nonlocal term. This result allows us to prove the existence of standing wave ( ground ... 
A Study of Higher Order Terms in Shallow Water Waves via Modified PLK Method
(WALTER DE GRUYTER GMBH, 201404)In this work, by utilizing the modified PLK (PoincareLighthillKou) method, we studied the propagation of weakly nonlinear waves in a shallow water theory and obtained the KortewegdeVries (KdV) and the linearized KdV ... 
Subclass of mquasiconformal harmonic functions in association with Janowski starlike functions
(Elsevier Science Inc, 20180215)Let's take f(z) = h (z) + <(g(z))over bar> which is an univalent sensepreserving harmonic functions in open unit disc D = {z : vertical bar z vertical bar < 1}. If f (z) fulfills vertical bar w(z)vertical bar = ... 
Timelike Rotational Surfaces of Elliptic, Hyperbolic and Parabolic Types in Minkowski Space E1(4) with Pointwise 1Type Gauss Map
(UNIV NIS, FAC SCI MATH, 2015)In this work, we focus on a class of timelike rotational surfaces in Minkowski space E1(4) with 2dimensional axis. There are three types of rotational surfaces with 2dimensional axis, called rotational surfaces of ... 
Topological Hopf algebras and their Hopfcyclic cohomology
(Taylor and Francis, 20190129)A natural extension of the Hopfcyclic cohomology, with coefficients, is introduced to encompass topological Hopf algebras. The topological theory allows to work with infinite dimensional Lie algebras. Furthermore, the ... 
A travelling wave solution to the KdVBurgers equation
(Elsevier Inc, 200407)In the present work, by introducing a new potential function and by using the hyperbolic tangent method and an exponential rational function approach, a travelling wave solution to the KdVBurgers (KdVB) equation is ... 
Two remarks on a generalized DaveyStewartson system
(Elsevier Ltd, 20060401)We present two results on a generalized DaveyStewartson system, both following from the pseudoconformal invariance of its solutions. In the hyperbolicellipticelliptic case, under some conditions on the physical parameters, ... 
Twodimensional wave packets in an elastic solid with couple stresses
(PergamonElsevier Science Ltd, 200408)The problem of (2+1) (two spatial and one temporal) dimensional wave propagation in a bulk medium composed of an elastic material with couple stresses is considered. The aim is to derive (2+1) nonlinear model equations ...