Zobrazeno 1 - 7
of 7
pro vyhledávání: '"N K Mamadaliev"'
Publikováno v:
Journal of Mathematical Sciences. 245:390-397
In this paper, we examine categorical and cardinal properties of hyperspaces with finite number of components. We prove that the functor Cn : Comp → Comp is not normal, i.e., it does not preserve epimorphisms of continuous mappings. We also discuss
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db7815599f70f48a41cb10c170b2da8e
https://doi.org/10.1007/s10958-020-04701-8
https://doi.org/10.1007/s10958-020-04701-8
On Non-increasing of the Density and the Weak Density under Weakly Normal Functors of Finite Support
Autor:
N K Mamadaliev, R B Beshimov
Publikováno v:
Mathematics and Statistics. 3:129-133
In the paper it is proved that if a covariant functor F : Comp → Comp is weakly normal, then for any infinite Tychonoff space X following inequalities hold: d(F n (X)) ≤ d(X), d(F ! (X)) ≤ d(X), wd(F n (X)) ≤ wd(X), wd(F ! (X)) ≤ wd(X).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac4536e0810dea8178651e85feb01908
https://doi.org/10.13189/ms.2015.030503
https://doi.org/10.13189/ms.2015.030503
Publikováno v:
Mathematics and Statistics. 3:101-105
In the paper the local density and the local weak density of topological spaces are investigated. It is proved that for stratifiable spaces the local density and the local weak density coincide, these cardinal numbers are preserved under open mapping
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03b35cfa3367d6129261b1211c509c48
https://doi.org/10.13189/ms.2015.030404
https://doi.org/10.13189/ms.2015.030404
Publikováno v:
British Journal of Mathematics & Computer Science. 10:1-7
In the paper the local density and the local weak density of topological spaces are investigated. It is proved that for a -irreducible mapping f of a topological space X onto a topological space Y the followings hold: d(X) = d(Y ), wd(X) = wd(Y ), ld
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75316d037056eecad79e89dda9e80f0c
https://doi.org/10.9734/bjmcs/2015/19311
https://doi.org/10.9734/bjmcs/2015/19311
Autor:
N. K. Mamadaliev
Publikováno v:
Siberian Mathematical Journal. 41:889-899
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e97a84d6d4c0ee12039d3977ab0c64e
https://doi.org/10.1007/bf02674745
https://doi.org/10.1007/bf02674745
Autor:
N. K. Mamadaliev
Publikováno v:
Mathematical Notes. 66:310-315
A new integral representation of solutions of a Tricomi problem for a strongly degenerate system of equations of parabolic-hyperbolic type is constructed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b37bf9db7c9129ff21c79dfe0c28904
https://doi.org/10.1007/bf02676439
https://doi.org/10.1007/bf02676439