for Journals by Title or ISSN for Articles by Keywords help
 Subjects -> MATHEMATICS (Total: 979 journals)     - APPLIED MATHEMATICS (81 journals)    - GEOMETRY AND TOPOLOGY (20 journals)    - MATHEMATICS (724 journals)    - MATHEMATICS (GENERAL) (41 journals)    - NUMERICAL ANALYSIS (22 journals)    - PROBABILITIES AND MATH STATISTICS (91 journals) MATHEMATICS (724 journals)                  1 2 3 4 | Last

1 2 3 4 | Last

 Arabian Journal of MathematicsNumber of Followers: 2     Open Access journal ISSN (Print) 2193-5343 - ISSN (Online) 2193-5351 Published by SpringerOpen  [228 journals]
• On Picard value problem of some difference polynomials

• Abstract: In this paper, we study the value distribution of zeros of certain nonlinear difference polynomials of entire functions of finite order.
PubDate: 2018-03-01

• A note on generalized derivations on prime rings

• Abstract: Let R be a prime ring with the extended centroid C and symmetric Martindale quotient ring $$Q_s(R)$$ . In this paper we prove the following result. Let $$F: R \rightarrow R$$ be a generalized derivation associated with a non-zero derivation d on R and let h be an additive map of R such that $$F(x)x=xh(x)$$ for all $$x\in R$$ . Then either R is commutative or $$F(x)=xp$$ and $$h(x)=px$$ where $$p\in Q_{s}(R)$$ .
PubDate: 2017-12-29

• Coupled nonlinear Schrödinger equations with harmonic potential

• Abstract: The initial value problem for a coupled nonlinear Schrödinger system with unbounded potential is investigated. In the defocusing case, global well-posedness is obtained. In the focusing case, the existence and stability/instability of standing waves are established. Moreover, global well-posedness is discussed via the potential well method.
PubDate: 2017-12-15

• Congruences modulo 8 for $$(2,\, k)$$ ( 2 , k ) -regular overpartitions
for odd $$k > 1$$ k > 1

• Abstract: In this paper, we study various arithmetic properties of the function $$\overline{p}_{2,\,\, k}(n)$$ , which denotes the number of $$(2,\,\, k)$$ -regular overpartitions of n with odd $$k > 1$$ . We prove several infinite families of congruences modulo 8 for $$\overline{p}_{2,\,\, k}(n)$$ . For example, we find that for all non-negative integers $$\beta , n$$ and $$k\equiv 1\pmod {8}$$ , $$\overline{p}_{2,\,\, k}(2^{1+\beta }(16n+14))\equiv ~0\pmod {8}$$ .
PubDate: 2017-12-14

• Refinements on the discrete Hermite–Hadamard inequality

• Abstract: In this paper, we use techniques and tools from time scale calculus to state and prove many refinements on the discrete Hermite–Hadamard inequality.
PubDate: 2017-12-12

• On formulae for the determinant of symmetric pentadiagonal Toeplitz
matrices

• Abstract: We show that the characteristic polynomial of a symmetric pentadiagonal Toeplitz matrix is the product of two polynomials given explicitly in terms of the Chebyshev polynomials.
PubDate: 2017-12-11

• Evaluation of various partial sums of Gaussian q -binomial sums

• Abstract: We present three new sets of weighted partial sums of the Gaussian q-binomial coefficients. To prove the claimed results, we will use q-analysis, Rothe’s formula and a q-version of the celebrated algorithm of Zeilberger. Finally we give some applications of our results to generalized Fibonomial sums.
PubDate: 2017-12-08

• Optimal codes from Fibonacci polynomials and secret sharing schemes

• Abstract: In this work, we study cyclic codes that have generators as Fibonacci polynomials over finite fields. We show that these cyclic codes in most cases produce families of maximum distance separable and optimal codes with interesting properties. We explore these relations and present some examples. Also, we present applications of these codes to secret sharing schemes.
PubDate: 2017-12-01

• (1,1)-Tensor sphere bundle of Cheeger–Gromoll type

• Abstract: We construct a metrical framed $$f(3,-1)$$ -structure on the (1, 1)-tensor bundle of a Riemannian manifold equipped with a Cheeger–Gromoll type metric and by restricting this structure to the (1, 1)-tensor sphere bundle, we obtain an almost metrical paracontact structure on the (1, 1)-tensor sphere bundle. Moreover, we show that the (1, 1)-tensor sphere bundles endowed with the induced metric are never space forms.
PubDate: 2017-12-01

• On wave equation: review and recent results

• Abstract: The aim of this paper is to give an overview of results related to nonlinear wave equations during the last half century. In this regard, we present results concerning existence, decay and blow up for classical nonlinear equations. After that, we discuss briefly some important results of the variable-exponent Lebesgue and Sobolev spaces. Results related to nonexistence and blow up for wave equations with non-standard nonlinearities (nonlinearities involving variable exponents) are given in more detail. Finally, we present some recent decay and blow up results together with their proofs.
PubDate: 2017-11-27

• Weighted majorization inequalities for n -convex functions via extension
of Montgomery identity using Green function

• Abstract: New identities and inequalities are given for weighted majorization theorem for n-convex functions by using extension of the Montgomery identity and Green function. Various bounds for the reminders in new generalizations of weighted majorization formulae are provided using Čebyšev type inequalities. Mean value theorems are also discussed for functional related to new results.
PubDate: 2017-11-17

• General solution for MHD-free convection flow over a vertical plate with
ramped wall temperature and chemical reaction

• Abstract: The aim of the article is to study the unsteady magnetohydrodynamic-free convection flow of an electrically conducting incompressible viscous fluid over an infinite vertical plate with ramped temperature and constant concentration. The motion of the plate is a rectilinear translation with an arbitrary time-dependent velocity. Closed-form solutions for the temperature, concentration and velocity fields of the fluid are obtained. The influence of transverse magnetic field that is fixed relative either to fluid or plate is studied. Furthermore, the effects of system parameters on the fluid velocity are analyzed through numerical simulations and graphical illustrations.
PubDate: 2017-10-06

• NSE characterization of the Chevalley group $$\varvec{G}_{\varvec{2}} {\varvec{(4)}}$$ G 2 ( 4 )

• Abstract: Let G be a group and $$\omega (G)=\{o(g) g\in G\}$$ be the set of element orders of G. Let $$k\in \omega (G)$$ and $$s_k= \{g\in G o(g)=k\}$$ . Let $$nse(G)=\{s_k k\in \omega (G) \}$$ . In this paper, we prove that if G is a group and $$G_2 (4)$$ is the Chevalley group such that $$nse(G)=nse(G_2 (4))$$ , then $$G\cong G_2 (4)$$ .
PubDate: 2017-09-22

• Fractional parts and their relations to the values of the Riemann zeta
function

• Abstract: A well-known result, due to Dirichlet and later generalized by de la Vallée–Poussin, expresses a relationship between the sum of fractional parts and the Euler–Mascheroni constant. In this paper, we prove an asymptotic relationship between the summation of the products of fractional parts with powers of integers on the one hand, and the values of the Riemann zeta function, on the other hand. Dirichlet’s classical result falls as a particular case of this more general theorem.
PubDate: 2017-09-06

• Hyponormality of generalised slant weighted Toeplitz operators with
polynomial symbols

• Abstract: For a sequence of positive numbers $$\beta =\{\beta _{n}\}_{n\in \mathbb {Z}}$$ , the space $$L^2(\beta )$$ consists of all $$f(z)=\sum _{-\infty }^\infty a_nz^n$$ , $$a_n\in \mathbb {C}$$ for which $$\sum _{-\infty }^\infty a_n ^2\beta _n^2<\infty$$ . For a bounded function $$\varphi (z)=\sum _{-\infty }^\infty a_nz^n$$ , the slant weighted Toeplitz operator $$A_\varphi ^{(\beta )}$$ is an operator on $$L^2(\beta )$$ defined as $$A_\varphi ^{(\beta )}=WM_\varphi ^{(\beta )}$$ , where $$M_\varphi ^{(\beta )}$$ is the weighted multiplication operator on $$L^2(\beta )$$ and W is an operator on $$L^2(\beta )$$ such that $$Wz^{2n}=z^n$$ , $$Wz^{2n-1}=0$$ for all $$n\in \mathbb {Z}$$ . In this paper we show that for a trigonometric polynomial $$\varphi (z)=\sum _{n=-p}^q a_nz^n$$ , $$A_\varphi ^{(\beta )}$$ cannot be hyponormal unless $$\varphi \equiv 0$$ . We also show that, for $$k \ge 2$$ the $$k^{th}$$ order slant weighted Toeplitz operator $$U_{k,\varphi }^{(\beta )}$$ cannot be hyponormal unless $$\phi \equiv 0$$ . Also the compression of $$U_{k,\varphi }^{(\beta )}$$ to $$H^2(\beta )$$ , denoted by $$V_{k,\varphi }^{(\beta )}$$ , cannot be hyponormal unless $$\phi \equiv 0$$ .
PubDate: 2017-09-05

• A new lower bound for LS-category

• Abstract: Let X be a simply connected CW-complex of finite type and $${\mathbb {K}}$$ an arbitrary field. In this paper, we use the Eilenberg–Moore spectral sequence of $$C_*(\Omega (X), \mathbb K)$$ to introduce a new homotopical invariant $$\textsc {r}(X, {\mathbb {K}})$$ . If X is a Gorenstein space with nonzero evaluation map, then $$\textsc {r}(X, {\mathbb {K}})$$ turns out to interpolate $$\mathrm {depth}(H_*(\Omega (X), {\mathbb {K}}))$$ and $$\mathrm {e}_{{\mathbb {K}}}(X)$$ . We also define for any minimal Sullivan algebra $$(\Lambda V,d)$$ a new spectral sequence and make use of it to associate to any 1-connected commutative differential graded algebra (A, d) a similar invariant $$\textsc {r}(A,d)$$ . When $$(\Lambda V,d)$$ is a minimal Sullivan model of X, this invariant fulfills the relation $$\textsc {r}(X, {\mathbb {K}}) = \textsc {r}(\Lambda V,d)$$ .
PubDate: 2017-09-01

• Weakly submaximal spaces and compactifications

• Abstract: In this paper, we characterize spaces such that their one-point compactification (resp., Herrlich compactification) is weakly submaximal. We also establish a necessary and sufficient condition on $$T_{0}$$ -spaces in order to get their one-point compactification (resp., Herrlich compactification) $$T_{D}$$ -spaces.
PubDate: 2017-08-30

• Turán type inequalities for the q -exponential functions

• Abstract: In this paper, our aim is to deduce some sharp Turán type inequalities for the remainder q-exponential functions. Our results are shown to be generalizations of results which were obtained by Alzer (Arch Math 55, 462–464, 1990).
PubDate: 2017-08-21

• Existence of periodic solutions for some quasilinear parabolic problems
with variable exponents

• Abstract: In this paper, we prove the existence of at least one periodic solution for some nonlinear parabolic boundary value problems associated with Leray–Lions’s operators with variable exponents under the hypothesis of existence of well-ordered sub- and supersolutions.
PubDate: 2017-08-19

• Minimal representations of Lie algebras with non-trivial Levi
decomposition

• Abstract: We obtain minimal dimension matrix representations for each of the Lie algebras of dimensions five, six, seven and eight obtained by Turkowski that have a non-trivial Levi decomposition. The key technique involves using the invariant subspaces associated to a particular representation of a semi-simple Lie algebra to help in the construction of the radical in the putative Levi decomposition.
PubDate: 2017-08-17

JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327

Home (Search)
Subjects A-Z
Publishers A-Z
Customise
APIs