Güncel Gönderiler: Matematik Bölümü
Toplam kayıt 544, listelenen: 401-420
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Grobner-Shirshov bases of some monoids
(Elsevier Science Bv, 2011)The main goal of this paper is to define Grobner-Shirshov bases for some monoids. Therefore, after giving some preliminary material, we first give Grobner-Shirshov bases for graphs and Schutzenberger products of monoids ... -
Approximation in weighted orlicz spaces
(Versita, 2011)We prove some direct and converse theorems of trigonometric approximation in weighted Orlicz spaces with weights satisfying so called Muckenhoupt's A (p) condition. -
Warped products with a semi-symmetric metric connection
(Mathematical Soc Rep China, 2011)We find relations between the Levi-Civita connection and a semi-symmetric metric connection of the warped product M = M(1) x(f) M(2). We obtain some results of Einstein warped product manifolds with a semi-symmetric metric ... -
On the some normal subgroups of the extended modular group
(Elsevier Science Inc, 2011)In this paper, we give the group structures and the signatures of some normal subgroups of the extended modular group Pi containing the principal congruence subgroup Gamma(12). -
The next step of the word problem over monoids
(Elsevier Science Inc, 2011)It is known that a group presentation P can be regarded as a 2-complex with a single 0-cell. Thus we can consider a 3-complex with a single 0-cell which is known as a 3-presentation. Similarly, we can also consider ... -
Complex valued neural network with Mobius activation function
(Elsevier Science Bv, 2011)In this work, we propose a new type of activation function for a complex valued neural network (CVNN). This activation function is a special Mobius transformation classified as reflection. It is bounded outside of the unit ... -
Generalized fibonacci sequences related to the extended hecke groups and an application to the extended modular group
(Scientific Technical Research Council Turkey-Tubitak, 2010)The extended Hecke groups (H) over bar (lambda(q)) are 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 >= 3 integer. In this paper, we obtain a sequence which ... -
Rewriting as a special case of noncommutative grobner bases theory for the affine weyl group ((a)over tilde(n))
(Birkhauser Boston, 2010)The aim of this work is to find Grobner-Shirshov bases of the affine Weyl group of type (A(n)) over tilde (n >= 2) from the point of complete rewriting systems. -
On generalized pseudo ricci symmetric manifolds admitting semi-symmetric metric connection
(Estonian Academy Publishers, 2010)The object of the present paper is to investigate the applications of generalized pseudo Ricci symmetric manifolds admitting a semi-symmetric metric connection to the general relativity and cosmology. Also the existence ... -
Determination of genus of normal subgroups of discrete groups
(Amer Inst Physics, 2010)In this work, subgroups of a special class of discrete subgroups of PLS(2, R), namely the ones of the first kind with genus 0, have been studied. We establish a technique to compute the genus of these subgroups in terms ... -
Primes in z[exp(2 pi i/3)]
(Amer Inst Physics, 2010)In this paper, we study the primes in the ring Z[w], where w = exp(2 pi i/3) is a cubic root of unity. We gave a classification of them and some results related to the use of them in the calculation of cubic residues are obtained. -
On the efficiency of semi-direct products of finite cyclic monoids by one-relator monoids
(Amer Inst Physics, 2010)In this paper we give necessary and sufficient conditions for the efficiency of a standard presentation for the semi-direct product of finite cyclic monoids by one-relator monoids. -
On the norms of toeplitz and hankel matrices with pell numbers
(Amer Inst Physics, 2010)Let us define A = [a(ij)](i,j=0)(n-1) and B = [b(ij)](i,j=0)(n-1) as n x n Toeplitz and Hankel matrices, respectively, such that a(ij) = Pi-j and b(ij) = Pi+j, where P denotes the Pell number. We present upper and lower ... -
A new example of deficiency one groups
(Amer Inst Physics, 2010)The main purpose of this paper is to present a new example of deficiency one groups by considering the split extension of a finite cyclic group by a free abelian group having rank two. -
Generalization for estrada index
(Amer Inst Physics, 2010)In this paper the Estrada index of Hermite matrix is firstly defined and investigated. In fact this is a natural generalization of Estrada, distance Estrada and Laplacian Estrada indices. Thus all properties about them can ... -
The properties of convolution type transforms in weighted orlicz spaces
(Croatian Mathematical Soc, 2010)In the weighted Orlicz spaces a convolution type transform is defined and a relation between this transform and the best approximation by trigonometric polynomials in the weighted Orlicz spaces is obtained. -
Approximation theorems in weighted lorentz spaces
(North Univ Baia Mare, 2010)In this paper we deal with the converse and simultaneous approximation problems of functions possessing derivatives of positive orders by trigonometric polynomials in the weighted Lorentz spaces with weights satisfying the ... -
A dynamic system approach to quadratic programming problems with penalty method
(Malaysian Mathematical Sciences Soc, 2010)In this work, we propose a dynamical system (state space) model approach to find a unique minimum of quadratic programming (QP) problem,;, with equality constrained. The unique minimum of the optimization problem is also ... -
Simultaneous and converse approximation theorems in weighted orlicz spaces
(Belgian Mathematical Soc Triomphe, 2010)In the present work, we investigate the simultaneous and converse approximation by trigonometric polynomials of the functions in the Orlicz spaces with weights satisfying so called Muckenhoupt's A(p) condition. -
On the two-square theorem and the modular group
(Charles Babbage Res Ctr, 2010)Given a positive integer n such that -1 is a quadratic residue mod n, we give an algorithm that computes the integers u and v which satisfy the equation n = u(2) + v(2). To do this we use the group structure of the Modular ...
