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Browsing Matematik / Mathematics by Issue Date

Browsing Matematik / Mathematics by Issue Date

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  • Cebir 
    Çallıalp, Fethi (Sakarya Üniversitesi, 1994)
  • A note on some subgroups of PSL(2,C) 
    Keskin, Refik (WORLD SCIENTIFIC PUBL CO PTE LTD, 2003)
    In this paper, we introduce some discrete subgroups of PSL(2, C) and determine the number of cusps of 3-manifolds associated to those groups.
  • On some new sequence spaces of fuzzy numbers 
    Başarır, Metin (INDIAN NAT SCI ACAD, 2003)
    In this paper, we introduce and study some new sequence spaces of fuzzy numbers generated by non-negative regular matrix A = (a(nk)) (n, k = 1, 2).
  • Fully renormalized quasi-particle random phase approximation, spurious states and ground state correlations 
    Guliyev, Ali; Güner, Mehmet (IOP PUBLISHING LTD, 2004)
    An approach, called fully renormalized QRPA (FR-QRPA), which takes into account the Pauli principle for the ground state correlations (GSC) and fulfills the Ikeda sum rule has recently been developed. Here a new rotational ...
  • On idempotency of linear combinations of idempotent matrices 
    Özdemir, Halim (ELSEVIER SCIENCE INC, 2004)
    P-1, P-2 and P-3 being any three different nonzero mutually commutative n x n idempotent matrices, and C-1 C-2 and C-3 being nonzero scalars, the problem of characterizing some situations, where a linear combination of the ...
  • Asymptotic behaviour of the solutions of inverse problems for pseudo-parabolic equations 
    Yaman, Metin; Gözükızıl, Ömer Faruk (ELSEVIER SCIENCE INC, 2004)
    We study asymptotic proximity as t --> infinity of the Solutions of the inverse problem for a pseudo-parabolic equation with an unknown source function. The overdetermination condition is given in integral form. (C) 2003 ...
  • A note on linear combinations of commuting tripotent matrices 
    Özdemir, Halim (ELSEVIER SCIENCE INC, 2004)
    The purpose of this note is to characterize all situations in which a linear combination of two commuting tripotent matrices is also a tripotent matrix. In the case of real scalars and real symmetric matrices, this problem ...
  • A note on some Fuchsian groups 
    Keskin, Refik (SPRINGER, 2005)
    In this paper, we introduce some Fuchsian groups and calculate their parabolic class numbers. In addition, we give two conjectures concerning with the parabolic class number.
  • Proof of a conjecture related to the parabolic class numbers of some Fuchsian groups 
    Keskin, Refik (ELSEVIER SCIENCE INC, 2005)
    This paper proves a conjecture given in [6], which is concerning with the parabolic class numbers of some Fuchsian groups.
  • A study on time-like complementary ruled surfaces in the Minkowski n-space 
    Tosun, Murat; Güngör, Mehmet Ali (SHIRAZ UNIV, 2005)
    For the first time in the Minkowski space, an R-1(n) time-like complementary ruled surface is described and relations are given connected with an asymptotic and tangential bundle of the time-like complementary ruled surface. ...
  • A. note on some modular subgroups 
    Keskin, Refik (ROCKY MT MATH CONSORTIUM, 2005)
    In this study, we introduce some modular subgroups and we calculate parabolic class numbers of those groups. In addition to this, we gave a nice formula for the parabolic class number of Gamma(0)(n(2)).
  • The homothetic motions in the Lorentz 3-space 
    Tosun, Murat; Güngör, Mehmet Ali (SPRINGER, 2006)
    In this article, the properties of the homothetic motions in three-dimensional Lorentz space are investigated. Also, some geometric results between velocity and acceleration vectors of a point in a spatial motion are obtained.
  • Linear codes over F-q[u]/(u(s)) with respect to the Rosenbloom-Tsfasman metric 
    Özen, Mehmet (SPRINGER, 2006)
    We investigate the structure of codes over F-q[u]/(u(s)) rings with respect to the Rosenbloom-Tsfasman (RT) metric. We de. ne a standard form generator matrix and show how we can determine the minimum distance of a code ...
  • Suborbital graphs for the normalizer of Gamma(0)(m) 
    Keskin, Refik (ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2006)
    In this study, we characterize all circuits in the suborbital graph for the normalizer of Gamma(0) (m) when in is a square-free positive integer. We propose a conjecture concerning the suborbital graphs. (C) 2004 Elsevier ...
  • Codes over Galois rings with respect to the Rosenbloom-Tsfasman metric 
    Özen, Mehmet (PERGAMON-ELSEVIER SCIENCE LTD, 2007)
    We investigate the structure of codes over Galois rings with respect to the Rosenbloom-Tsfasman (shortly RT) metric. We define a standard form generator matrix and show how we can determine the minimum distance of a code ...
  • Spatial estimates for a system of coupled parabolic-hyperbolic equations under nonlinear boundary condition 
    Yılmaz, Yalçın (PERGAMON-ELSEVIER SCIENCE LTD, 2007)
    The aim of this study is to present spatial estimates of Phragmen-Lindelof type for a dynamical system. We show that an appropriate measure of the solutions either tends to infinity by exponential rate or decays to zero ...
  • An oriented state model for the Jones polynomial and its applications alternating links 
    Altıntaş, İsmet (ELSEVIER SCIENCE INC, 2007)
    In this paper, we de. ne a polynomial invariant of regular isotopy, G(L), for oriented knot and link diagrams L. From G(L) by multiplying it by a normalizing factor, we obtain an ambient isotopy invariant, N-L, for oriented ...
  • A Phragmen-Lindelof type theorem for quasilinear viscoelasticity equations 
    Yılmaz, Yalçın; Yılmaz, Yücel (PERGAMON-ELSEVIER SCIENCE LTD, 2007)
    We obtained the spatial growth and decay estimates for solutions of a class of quasilinear equations modelling dynamic viscoelasticity in a domain Omega x (0, T), where Omega subset of R-n is a semi-infinite cylinder. (C) ...
  • On some generalized difference sequences of fuzzy numbers 
    Başarır, Metin (ACADEMIC PUBLICATION COUNCIL, 2007)
    The purpose of this paper is to introduce the concepts of statistical convergence and strongly (p)-Cesaro convergence of generalized difference sequences of fuzzy numbers. We give some relations related to these concepts. ...
  • Long-time behaviour of the solutions to inverse problems for parabolic equations 
    Gözükızıl, Ömer Faruk; Yaman, Metin (ELSEVIER SCIENCE INC, 2007)
    We study long-time behaviour as t -> infinity of the solutions of the inverse problem for parabolic equation with an unknown source function. The overdetermination condition is given in integral form. Under some conditions, ...