Güncel Gönderiler: Matematik Bölümü
Toplam kayıt 544, listelenen: 341-360
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On P-Sasakian manifolds satisfying certain conditions on the concircular curvature tensor
(Scientific Technical Research Council Turkey-Tubitak, 2007)We classify P-Sasakian manifolds, which satisfy the conditions Z(xi,X). Z = 0, Z(xi, X) . R = 0, R(xi, X) . Z = 0, Z(xi, X) . S = 0 and Z(xi, X) . C = 0. -
Approximation properties of the Bieberbach polynomials in closed Dini-smooth domains
(Belgian Mathematical Soc Triomphe, 2006)Let G be a finite Dini-smooth domain and w = phi(0)(z) be the confornial mapping of G onto D (0, r(0)) := {w :vertical bar w vertical bar < r(0)) with the normalization phi(0)(z(0)) = 0, phi'(0)(z(0)) = 1, where z(0) is ... -
On the mean summability by Cesaro method of Fourier trigonometric series in two-weighted setting
(Springeropen, 2006)The Cesaro summability of trigonometric Fourier series is investigated in the weighted Lebesgue spaces in a two-weight case, for one and two dimensions. These results are applied to the prove of two-weighted Bernstein's ... -
Approximation in weighted Smirnov-Orlicz classes
(Duke Univ Press,, 2006)In this work some direct and inverse theorems of approximation theory in the weighted Smirnov-Orlicz classes, defined in the domains with a Dini-smooth boundary, are proved. In particular, a constructive characterization ... -
Power subgroups of some Hecke groups
(Rocky Mt Math Consortium, 2006)Let q > 3 be an even integer and let H(lambda(q)) be the Hecke group associated to q. Let m be a positive integer and H-m(lambda(q)) the power subgroup of H(lambda(q)). In this work the power subgroups H-m(lambda(q)) are ... -
Some normal subgroups of the extended Hecke groups H(lambda(p))
(Rocky Mt Math Consortium, 2006)We consider the extended Hecke groups (H) over bar (lambda p) generated by T(z) = -1/z, S(z) = -1/(z+lambda p) and R(z) = 1/(z) over bar with lambda P = 2 cos(pi/p) for p >= 3 prime number. In this article, we study the ... -
Approximation by trigonometric polynomials in weighted Orlicz spaces
(Polish Acad Sciences Inst Physics, 2006)We investigate the approximation properties of the partial sums of the Fourier series and prove some direct and inverse theorems for approximation by polynomials in weighted Orlicz spaces. In particular we obtain a ... -
A note on some subgroups of psl(2,c)
(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 the two-dimensional differential transform method
(Elsevier Science Bv, 2003)In this paper, two-dimensional differential transform method of solution of the initial value problem for partial differential equations (PDEs) have been studied. New theorems have been added and some linear and nonlinear ... -
Uniform convergence of the Bieberbach polynomials in closed smooth domains of bounded boundary rotation
(Academic Press Inc Elsevier Science, 2003)Let G be a Jordan smooth domain of bounded boundary rotation, let z(0) epsilon G, and let w = phi(0) (z) be the conformal mapping of G onto D (0, r(0)) := {w : \w\ < r(0)) with the normalization phi(0) (z(0)) = 0, phi(0)' ... -
Some subgroups of the extended Hecke groups H(-)over-bar(lambda(q))
(Elsevier Science Bv, 2003)The authors consider the extended Hecke groups (H) over bar(lambda(q)) generated by T(z) = -1/z, S(z) = -1/(z + lambda(q)) and R(z) = 1/(z) over bar with lambda(q) = 2 cos(pi/q) for q greater than or equal to 3 an integer. ... -
On the sequences related to Fibonacci and Lucas numbers
(Korean Mathematical Soc, 2005)In this paper, we obtain some properties of the sequences U-n(q) and V-n(q) introduced in [6]. We find polynomial representations and formulas of them. For q = 5, U-n(5) is the Fibonacci sequence F-n and V-n(5) is the Lucas ... -
A new characterization of Mobius transformations by the use of Apollonius points of (2n-1)-gons
(Springer Heidelberg, 2005)In this paper, we give a new characterization of Mobius transformations. To do this, we extend the notion of Apollonius points of a triangle and of a pentagon, to the notion of Apollonius points of an arbitrary (2n - 1)-gon. -
Proof of a conjecture related to the parabolic class numbers of some Fuchsian groups
(Elsevier Science Inc, 2005)This paper proves a conjecture given in [6], which is concerning with the parabolic class numbers of some Fuchsian groups. -
Rational approximation in Orlicz spaces on Carleson curves
(Belgian Mathematical Soc Triomphe, 2005)We define some subclasses of Orlicz spaces of functions and establish here a direct theorem of the approximation theory by rational functions. -
Submanifolds satisfying some curvature conditions imposed on the Weyl tensor
(Australian Mathematics Publ Assoc Inc, 2003)In this paper we define Weyl semiparallel (C . h = 0) and Weyl 2-semiparallel (C . (&DEL;) over barh 0) submanifolds. We consider n-dimensional normally flat submanifolds satisfying these curvature conditions in (n + ... -
The p-cockcroft property of the semi-direct products of monoids
(World Scientific Publ Co Pte Ltd, 2003)The semi-direct product of arbitrary two monoids and a presentation for this product have received considerable attention, see for instance [12, 14, 15]. In [15], Wang defined a trivializer set of the Squier complex ... -
Integral control by variable sampling based on steady-state data
(Pergamon-Elsevier Science Ltd, 2003)In this paper we consider integral control algorithms with convergent adaptive sampling for multivariable infinite-dimensional systems. Steady-state gain information is used in choosing suitable integrator gains and we ... -
The integer sequence B = Bn(P,Q) with parameters P and Q
(Charles Babbage Res Ctr, 2015)In this work, we first prove that every prime number p equivalent to 1 (mod 4) can be written of the form P-2-4Q with two positive integers P and Q, and then we define the sequence B-n(P, Q) to be B-0 = 2, B-1 = P and B-n ... -
Minimal but inefficient presentations of the semi-direct products of some monoids
(Springer, 2003)In recent papers of Ruskuc, Saito and J. Wang, the semi-direct product of two arbitrary monoids and a standard presentation, say P, for this product have received considerable attention. Wang defined a trivialiser set of ...
