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Перегляд Український математичний журнал, 2011, том 63 за назвою

Репозиторій DSpace/Manakin

Перегляд Український математичний журнал, 2011, том 63 за назвою

Сортувати за: Порядок: Результатів:

  • Estimates for weighted eigenvalues of fourth-order elliptic operator with variable coefficients 
    He-Jun Sun (Український математичний журнал, 2011)
    We investigate the Dirichlet weighted eigenvalue problem for a fourth-order elliptic operator with variable coefficients in a bounded domain in Rⁿ. We establish a sharp inequality for its eigenvalues. It yields an estimate ...
  • Existence and exponential stability of periodic solution for fuzzy BAM neural networks with periodic coefficient 
    Dai-xi Liao; Li-hui Yang; Zhang Qian-hong (Український математичний журнал, 2011)
    A class of fuzzy bidirectional associated memory (BAM) networks with periodic coefficients is studied. Some sufficient conditions are established for the existence and global exponential stability of a periodic solution ...
  • Finite-dimensional subalgebras in polynomial Lie algebras of rank one 
    Arzhantsev, I.V.; Makedonskii, E.A.; Petravchuk, A.P. (Український математичний журнал, 2011)
    Let Wn(K) be the Lie algebra of derivations of the polynomial algebra K[X] := K[x1, . . . , xn] over an algebraically closed field K of characteristic zero. A subalgebra L ⊆ Wn(K) is called polynomial if it is a submodule ...
  • Fredholm quasi-linear manifolds and degree of Fredholm quasi-linear mapping between them 
    Abbasov, A. (Український математичний журнал, 2011)
    In this article a new class of Banach manifolds and a new class of mappings between them are presented and also the theory of degree of such mappings is given.
  • Functions of ultraexponential and infralogarithm types and general solution of the Abel functional equation 
    Нооshmаnd, M.H. (Український математичний журнал, 2011)
    We propose generalized forms of ultraexponential and infralogarithm functions introduced and studied by the author earlier and present two classes of special functions, namely, ultraexponential and infralogarithm f-type ...
  • Grüss-type and Ostrowski-type inequalities in approximation theory 
    Acu, A.-M.; Gonska, H.; Rasa, I. (Український математичний журнал, 2011)
    We discuss the Grass inequalities on spaces of continuous functions defined on a compact metric space. Using the least concave majorant of the modulus of continuity, we obtain a Grass inequality for the functional L(f)=H(f;x), ...
  • K теории сходимости и компактности для уравнений Бельтрами 
    Ломако, Т.В. (Український математичний журнал, 2011)
    Доведено теореми збiжностi та компактностi класiв регулярних розв’язкiв вироджених рiвнянь Бельтрамi з обмеженнями iнтегрального типу на дилатацiю.
  • Morse functions on cobordisms 
    Sharko, V.V. (Український математичний журнал, 2011)
    Вивчаються гомотопiчнi iнварiанти схрещених i гiльбертових комплексiв. Цi iнварiанти використовуютьcя для пiдрахунку точних значень чисел Морса гладких кобордизмiв.
  • Multidimensional random motion with uniformly distributed changes of direction and Erlang steps 
    Pogorui, A.O.; Rodriguez-Dagnino, R.M. (Український математичний журнал, 2011)
    In this paper we study transport processes in Rⁿ, n≥1, having non-exponential distributed sojourn times or non-Markovian step durations. We use the idea that the probabilistic properties of a random vector are completely ...
  • On fundamental group of Riemannian manifolds with ommited fractal subsets 
    Mirzaie, R. (Український математичний журнал, 2011)
    We show that if K is a closed and bounded subset of a Riemannian manifold M of dimension m>3, and the fractal dimension of K is less than m−3, then the fundamental groups of M and M−K are isomorphic.
  • On generalized derivations satisfying certain identities 
    Albaş, E. (Український математичний журнал, 2011)
  • On minimal non- MSP -groups 
    Guo, P.; Zhang Xirong (Український математичний журнал, 2011)
    A finite group G is called an MSP-group if all maximal subgroups of the Sylow subgroups of G are Squasinormal in G. In this paper, wc give a complete classification of those groups which are not MSP-groups but whose proper ...
  • On some imbedding relations between certain sequence spaces 
    Mursaleen, M.; Noman, A.K. (Український математичний журнал, 2011)
    In the present paper, we introduce the sequence space ` lλp of non-absolute type which is a p-normed space and a BK-space in the cases of 0 < p < 1 and 1 ≤ p < ∞, respectively. Further, we derive some imbedding ...
  • On ss-quasinormal and weakly s-supplemented subgroups of finite groups 
    Li, C.; Li, Y. (Український математичний журнал, 2011)
    Suppose that G is a finite group and H is a subgroup of G. H is called ss-quasinormal in G if there is a subgroup B of G such that G=HB and H permutes with every Sylow subgroup of B; H is called weakly s-supplemented in G ...
  • On strongly ⊕-supplemented modules 
    Nebiyev, C.; Pancar, A. (Український математичний журнал, 2011)
    In this work, strongly ⊕-supplemented and strongly cofinitely ⊕-supplemented modules are defined and some properties of strongly ⊕-supplemented and strongly cofinitely ⊕-supplemented modules are investigated. Let R be a ...
  • On the Bernstein - Walsh-type lemmas in regions of the complex plane 
    Abdullayev, F.G.; Aral, N.D. (Український математичний журнал, 2011)
  • On the energy and pseudo-angle of Frenet vector fields in Rⁿᵥ 
    Altin, A. (Український математичний журнал, 2011)
    In this paper, we compute the energy of a Frenet vector field and the pseudo-angle between Frenet vectors for a given non-null curve C in semi-Euclidean space of signature (n,v). It is shown that the energy and pseudo-angle ...
  • On thin-complete ideals of subsets of groups 
    Banakh, T.O.; Lyaskovska, N. (Український математичний журнал, 2011)
  • On uniqueness theorems for holomorphic curves sharing hypersurfaces without counting multiplicity 
    Phuong Ha Tran (Український математичний журнал, 2011)
    We prove some uniqueness theorems for algebraically nondegenerate holomorphic curves sharing hyper-surfaces ignoring multiplicity.
  • On weakly s -normal subgroups of finite groups 
    Li, Yangming; Qiao, Shouhong (Український математичний журнал, 2011)
    Assume that G is a finite group and H is a subgroup of G. We say that H is s-permutably imbedded in G if, for every prime number p that divides |H|, a Sylow p-subgroup of H is also a Sylow p-subgroup of some s-permutable ...

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