Search Results - "Tkachenko, M. G."

Comparative Analysis of Phenomenological Approximations for the Light Curves of Eclipsing Binary Stars with Additional Parameters by Andronov, I. L., Tkachenko, M. G., Chinarova, L. L.

“…A comparative analysis is made of special profiles of eclipses used for phenomenological modelling of the light curves of eclipsing binary stars. Families of…”
Get full text

REVISION OF THE PHENOMENOLOGICAL CHARACTERISTICS OF THE ALGOL-TYPE STARS USING THE NAV ALGORITHM by Tkachenko, M. G., Andronov, I. L., Chinarova, L. L.

“…Phenomenological characteristics of the sample of the Algol – type stars are revised using a recently developed NAV (“New Algol Variable”) algorithm…”
Get full text

Topological groups of Lipschitz functions and Graev metrics by Chasco, M.J., Domínguez, X., Tkachenko, M.G.

“…We study the properties of the free abelian topological group Ad(X) on a metric space (X,d) endowed with the topology generated by the Graev extension dˆ of a…”
Get full text

The weight and Lindelöf property in spaces and topological groups by Tkachenko, M.G.

“…We show that if Y is a dense subspace of a Tychonoff space X, then w(X)≤nw(Y)Nag(Y), where Nag(Y) is the Nagami number of Y. In particular, if Y is a Lindelöf…”
Get full text

Dyadicity index and metrizability of compact continuous images of function spaces by Tkachenko, M.G., Tkachuk, V.V.

“…We show that the dyadicity index can be increased by taking the square even in the class of second countable spaces. Besides, any compact group contains a…”
Get full text

Regular Gδ-diagonals and some upper bounds for cardinality of topological spaces by Gotchev, I. S., Tkachenko, M. G., Tkachuk, V. V.

“…We prove that, under CH, any space with a regular G δ -diagonal and caliber ω 1 is separable; a corollary of this result answers, under CH, a question of…”
Get full text

SELF-TRANSVERSAL SPACES AND THEIR DISCRETE SUBSPACES by JUHÁSZ, I., TKACHENKO, M.G., TKACHUK, V.V., WILSON, R.G.

“…A space X is called self-transversal if there is a bijection φ : X → X such that the family τ(X) U φ(τ(X)) forms a subbase of the discrete topology on X. We…”
Get full text

Continuity Properties of Discontinuous Homomorphisms and Refinements of Group Topologies by Bello, H.J., Rodríguez, L., Tkachenko, M.G.

“…We present several conditions on topological groupsGandHunder whicheverydiscontinuous homomorphism ofGtoHpreserves accumulation points of open sets inG. It is…”
Get full text

COMPARATIVE ANALYSIS OF NUMERICAL METHODS OF DETERMINATION OF PARAMETERS OF BINARY STARS. CASE OF SPHERICAL COMPONENTS by I. A. Andronov, M. G. Tkachenko

“…We discuss methods for modeling eclipsing binary stars. There are few realizations of the Wilson- Devinney (1971) code and its improvements, e.g. “Binary…”
Get full text

Precompact noncompact reflexive abelian groups by Ardanza-Trevijano, S, Chasco, M. J, Domínguez, X, Tkachenko, M. G

“…Forum Mathematicum V. 24 (2012), no. 2, 289-302 We present a series of examples of precompact, noncompact, reflexive topological Abelian groups. Some of them…”
Get full text

Zero-dimensional groups and factorization of homomorphisms with respect to weight and dimensionality by Tkachenko, M. G.

Get full text

Strong realcompactness and strong Dieudonné completeness in topological groups by Tkachenko, M.G., Hernández-García, C., López Ramírez, M.A.

“…We show that a topological group G is topologically isomorphic to a closed subgroup of a topological product of metrizable groups if and only if G is…”
Get full text

Pseudocompact topological groups and their properties by Tkachenko, M. G.

Get full text

Strong collective normality and countable compactness in free topological groups by Tkachenko, M. G.

Get full text

Boundedness and pseudocompactness in topological groups by Tkachenko, M. G.

Get full text

Souslin property in free topological groups on bicompacta by Tkachenko, M. G.

Get full text

Analytical Solution of Linear Differential Error Equations of Strapdown Inertial Navigation System, Functioning in the Normal Geographic Reference Frame, for the Case of an Object, Following the Geographical Equator by Loginov, Mikhail Yurievich, Tkachenko, Mikhail Gelievich, Chelnokov, Yuriy Nikolaevich

Get full text

Continuous images of function spaces by Tkachenko, M. G.

Get full text

Completeness of topological groups by Tkachenko, M. G.

Get full text

Some properties of free topological groups by Tkachenko, M. G.

Get full text