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Перегляд Український математичний журнал за назвою

Репозиторій DSpace/Manakin

Перегляд Український математичний журнал за назвою

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  • C2 Property of Column Finite Matrix Rings 
    Liang Shen; Jianlong Chen (Український математичний журнал, 2014)
    A ring R is called a right C2 ring if any right ideal of R isomorphic to a direct summand of RR is also a direct summand. The ring R is called a right C3 ring if any sum of two independent summands of R is also a direct ...
  • Cauchy problem for the essentially infinite-dimensional heat equation on a surface in a Hilbert space 
    Bogdansky, Yu.V. (Український математичний журнал, 1995)
    It is proved that the Cauchy problem for a simple parabolic equation with essentially infinite-dimensional coefficients on bounded level surfaces of smooth functions in a Hilbert space is uniformly well posed.
  • Certain Regularity of the Entropy Solutions for Nonlinear Parabolic Equations with Irregular Data 
    Li, F. (Український математичний журнал, 2015)
    We introduce new sets of functions different both from the space introduced in [Ph. Bénilan, L. Boccardo, T. Gallouёt, R. Gariepy, M. Pierre, and J. L. Vazquez, Ann. Scuola Norm. Super. Pisa, 22, No. 2, 241–273 (1995)] and ...
  • Characterization of A₁₆ by a noncommuting graph 
    Davoudi Monfared, М.; Darafsheh, M.R. (Український математичний журнал, 2010)
    Let G be a finite non-Abelian group. We define a graph Γ G ; called the noncommuting graph of G; with a vertex set G − Z(G) such that two vertices x and y are adjacent if and only if xy ≠ yx: Abdollahi, Akbari, and Maimani ...
  • Characterization of M₁₁ and L₃(3) by their commuting graphs 
    Salarian, M.R. (Український математичний журнал, 2010)
    For the groups M₁₁ and L₃(3), we show that their commuting graphs are unique
  • Classes of Analytic Functions Defined by a Differential Operator Related to Conic Domains 
    Deniz, E.; Orhan, H.; Sokół, J. (Український математичний журнал, 2015)
    Let A be the class of functions f(z) = z + ∑ k = 2∞ a k z k analytic in an open unit disc ∆. We use a generalized linear operator closely related to the multiplier transformation to study certain subclasses of A mapping ∆ ...
  • Classification of the regular components of two-dimentional inner maps 
    Vlasenko, I.Yu. (Український математичний журнал, 2014)
    We propose a topological classification of dynamical systems generated by two-dimensional inner maps on the fully invariant regular components of a wandering set with special attracting boundary (to within the topological ...
  • Closed polynomials and saturated subalgebras of polynomial algebras 
    Arzhantsev, I.V.; Petravchuk, A.P. (Український математичний журнал, 2007)
    The behavior of closed polynomials, i.e., polynomials f∈k[x₁,…,xn]∖k such that the subalgebra k[f] is integrally closed in k[x₁,…,xn], is studied under extensions of the ground field. Using some properties of closed ...
  • CLT-groups with Hall S-quasinormally embedded subgroups 
    Jianjun Liu; Shirong Li (Український математичний журнал, 2014)
    A subgroup H of a finite group G is said to be Hall S-quasinormally embedded in G if H is a Hall subgroup of the S-quasinormal closure H SQG . We study finite groups G containing a Hall S-quasinormally embedded subgroup ...
  • Coconvex Pointwise Approximation 
    Dzyubenko, G.A.; Gilewicz, J.; Shevchuk, I.A. (Український математичний журнал, 2002)
    Assume that a function f ∈ C[−1, 1] changes its convexity at a finite collection Y := {y 1, ... y s} of s points yi ∈ (−1, 1). For each n > N(Y), we construct an algebraic polynomial Pn of degree ≤ n that is coconvex ...
  • Codecomposition of a Transformation Semigroup 
    Sabbaghan, M.; Ayatollah Zadeh Shirazi, F.; Hosseini, A. (Український математичний журнал, 2013)
    The present paper deals with the concept of “codecomposition” of a transformation semigroup interacting with the phase semigroup. In this way, we distinguish new classes of transformation semigroups with meaningful relations, ...
  • Common fixed points and invariant approximation of R-subweakly commuting maps in convex metric spaces 
    Narang, T.D.; Chandok, S. (Український математичний журнал, 2010)
    Sufficient conditions for the existence of a common fixed point of R-subweakly commuting mappings are established within the framework of a convex metric space. As applications, we obtain various results on the best ...
  • Common fixed-point theorems and c-distance in ordered cone metric spaces 
    Rahimi, H.; Soleimani Rad, G. (Український математичний журнал, 2013)
    We present a generalization of several fixed and common fixed point theorems on c -distance in ordered cone metric spaces. In this way, we improve and generalize various results existing in the literature.
  • Common fixed-point theorems for nonlinear weakly contractive mappings 
    Chandok, S.; Khan, M.S.; Abbas, M. (Український математичний журнал, 2014)
    Some common fixed-point results for mappings satisfying a nonlinear weak contraction condition within the framework of ordered metric spaces are obtained. The accumulated results generalize and extend several comparable ...
  • Comparison theorems and necessary/sufficient conditions for the existence of nonoscillatory solutions of forced impulsive differential equations with delay 
    Shao Yuan Huang; Sui Sun Cheng (Український математичний журнал, 2012)
    In 1997, A. H. Nasr provided necessary and sufficient conditions for the oscillation of the equation where η > 0, p, and g are continuous functions on [0,∞) such that p(t) ≥ 0, g(t) ≤ t, g′(t) ≥ α > 0, and lim t→∞ g(t) ...
  • Completeness of invariant ideals in groups 
    Banakh, T.; Lyakovska, N. (Український математичний журнал, 2010)
    We introduce and study various notions of completeness of translation-invariant ideals in groups.
  • Conditions of Invertibility for Functional Operators with Shift in Weighted Hölder Spaces 
    Tarasenko, G.; Karelin, O. (Український математичний журнал, 2015)
    We consider functional operators with shift in weighted Hölder spaces. The main result of the work is the proof of the conditions of invertibility for these operators. We also indicate the forms of the inverse operators. ...
  • Conformal isoparametric spacelike hypersurfaces in conformal spaces Q⁴₁ and Q⁵₁ 
    Bianping Su; Shichang Shu (Український математичний журнал, 2012)
    We study the conformal geometry of conformal spacelike hypersurfaces in the conformal spaces Q⁴₁ and Q⁵₁. We obtain a complete classification of conformal isoparametric spacelike hypersurfaces in Q⁴₁ and Q⁵₁.
  • Congruences on ternary semigroups 
    Chronowski, A. (Український математичний журнал, 2004)
    We study ternary semigroups as universal algebras with one associative operation. We investigate their algebraic structure and associated representations. Results for congruences of ternary semigroups generated by binary ...
  • Connections to fixed points and Sil’nikov saddle-focus homoclinic orbits in singularly perturbed systems 
    Battelli, F.; Palmer, K.J. (Український математичний журнал, 2008)
    We consider a singularly perturbed system depending on two parameters with two (possibly the same) normally hyperbolic centre manifolds. We assume that the unperturbed system has an orbit connecting a hyperbolic fixed ...

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