مرور Volume 43, Issue 6 بر اساس عنوان

در حال نمایش موارد 1 - 20 از 30

  • Applications of convolution and‎ ‎subordination to certain $p$-valent functions 

    Hussain, S.؛ Sokół, J.؛ Farooq, U.؛ Darus, M.؛ Mahmood, T. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    In this paper we considered some new classes of multivalent functions by using Aouf-Silverman-Srivastava operator and derived some important results using convolution and subordination technique. This new class is an ...

  • Caratheodory dimension for observers 

    Molaei, M.R.؛ Sayyari, Y. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    ‎In this essay we introduce and study the notion of dimension for observers via Caratheodory structures and relative probability measures‎. ‎We show that the dimension as a three variables function is an increasing function ...

  • Classification of solvable groups with a given property 

    Rezaei, M.؛ Foruzanfar, Z. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    In this paper we classify all finite solvable groups satisfying the following property P5: their orders of representatives are set-wise relatively prime for any 5 distinct non-central conjugacy classes.

  • Classifying pentavalnet symmetric graphs of order $24p$ 

    Ling, B. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    A graph is said to be symmetric if its automorphism group is transitive on its arcs. A complete classification is given of pentavalent symmetric graphs of order 24p for each prime p. It is shown that a connected pentavalent ...

  • A descent method for explicit computations on curves 

    Filom, K. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    ‎It is shown that the knowledge of a surjective morphism $Xto Y$ of complex‎ ‎curves can be effectively used‎ ‎to make explicit calculations‎. ‎The method is demonstrated‎ ‎by the calculation of $j(ntau)$ (for some small ...

  • Duality for vector equilibrium problems with constraints 

    Anh, N.L.H. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    ‎In the paper‎, ‎we study duality for vector equilibrium problems using a concept of generalized convexity in dealing with the quasi-relative interior‎. ‎Then‎, ‎their applications to optimality conditions for quasi-relative ...

  • Entropy of a semigroup of maps from a set-valued view 

    Hou, B.؛ Wang, X. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    In this paper, we introduce a new entropy-like invariant, named Hausdorff metric entropy, for finitely generated semigroups acting on compact metric spaces from a set-valued view and study its properties. We establish the ...

  • Existence of positive solutions for a second-order p-Laplacian impulsive boundary value problem on time scales 

    Tokmak Fen, F.؛ Karaca, I.Y. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    In this paper, we investigate the existence of positive solutions for a second-order multipoint p-Laplacian impulsive boundary value problem on time scales. Using a new fixed point theorem in a cone, sufficient conditions ...

  • Functional identities of degree 2 in CSL algebras 

    Han, D. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    ‎Let $mathscr{L}$ be a commutative subspace lattice generated by finite many commuting independent nests on a complex separable Hilbert space $mathbf{H}$ with ${rm dim}hspace{2pt}mathbf{H}geq 3$‎, ‎${rm Alg}mathscr{L}$‎ ...

  • High-accuracy alternating segment explicit-implicit method for the fourth-order heat equation 

    Guo, G.؛ Lü, S. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    Based on a group of new Saul'yev type asymmetric difference schemes constructed by author, a high-order, unconditionally stable and parallel alternating segment explicit-implicit method for the numerical solution of the ...

  • Hölder continuity of solution maps to a parametric weak vector equilibrium problem 

    Preechasilp, P.؛ wangkeeree, R. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    In this paper, by using a new concept of strong convexity, we obtain sufficient conditions for Holder continuity of the solution mapping for a parametric weak vector equilibrium problem in the case where the solution mapping ...

  • A hybrid mean value involving a new Gauss sums and Dedekind sums 

    Li, X.X.؛ Zhang, W.P. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    ‎In this paper‎, ‎we introduce a new sum‎ ‎analogous to Gauss sum‎, ‎then we use the properties of the‎ ‎classical Gauss sums and analytic method to study the hybrid mean‎ ‎value problem involving this new sums and Dedekind ...

  • Hyperbolic surfaces of $L_1$-2-type 

    Lucas, P.؛ Ramírez-Ospina, H.F. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    In this paper, we show that an $L_1$-2-type surface in the three-dimensional hyperbolic space $H^3subset R^4_1$ either is an open piece of a standard Riemannian product $ H^1(-sqrt{1+r^2})times S^{1}(r)$, or it has non ...

  • Initial coefficients of starlike functions with real coefficients 

    Kumar, S.؛ Ravichandran, V.؛ Verma, S. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    The sharp bounds for the third and fourth coefficients of Ma-Minda starlike functions having fixed second coefficient are determined. These results are proved by using certain constraint coefficient problem for functions ...

  • The lower bound for the number of 1-factors in generalized Petersen graphs 

    Ren, H.؛ Yang, C.؛ Wang, J. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    ‎In this paper‎, ‎we investigate the number of 1-factors of a‎ ‎generalized Petersen graph $P(N,k)$ and get a lower bound for the‎ ‎number of 1-factors of $P(N,k)$ as $k$ is odd‎, ‎which shows that the‎ ‎number of 1-factors ...

  • A new hybrid conjugate gradient algorithm for unconstrained optimization 

    Han, X.؛ Zhang, J.؛ Chen, J. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    In this paper, a new hybrid conjugate gradient algorithm is proposed for solving unconstrained optimization problems. This new method can generate sufficient descent directions unrelated to any line search. Moreover, the ...

  • On derivations and biderivations of trivial extensions and triangular matrix rings 

    Ghosseiri, N.M. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    ‎Triangular matrix rings are examples of trivial extensions‎. ‎In this article we determine the structure of derivations and biderivations of the trivial extensions‎, ‎and thereby we describe the derivations and biderivations ...

  • On normalizers of maximal subfields of division algebras 

    Motiee, M. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    ‎Here‎, ‎we investigate a conjecture posed by Amiri and Ariannejad claiming‎ ‎that if every maximal subfield of a division ring $D$ has trivial normalizer‎, ‎then $D$ is commutative‎. ‎Using Amitsur classification of‎ ...

  • On three-dimensional $N(k)$-paracontact metric manifolds and Ricci solitons 

    De, U.C.؛ Deshmukh, S.؛ Mandal, K. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    The aim of this paper is to characterize $3$-dimensional $N(k)$-paracontact metric manifolds satisfying certain curvature conditions. We prove that a $3$-dimensional $N(k)$-paracontact metric manifold $M$ admits a Ricci ...

  • Properties of matrices with numerical ranges in a sector 

    Zhang, D.؛ Hou, L.؛ Ma, L. (Springer and the Iranian Mathematical Society (IMS), 2017-11-01)
    Let $(A)$ be a complex $(ntimes n)$ matrix and assume that the numerical range of $(A)$ lies in the set of a sector of half angle $(alpha)$ denoted by $(S_{alpha})$. We prove the numerical ranges of the conjugate, inverse ...