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Compactness in abelian categories
We relativize the notion of a compact object in an abelian category with respect to a fixed subclass of objects. We show that the standard closure properties persist to hold in this case. Furthermore, we describe categorica...
Pure mathematics
- 2019 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Compactness with respect to a convergence structure
A special convergence in (objects of) categories is introduced and compactness with respect to this convergence is studied...
BA - Obecná matematika
- 2002 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Neutrino trapping in extremely compact objects: I. Efficiency of trapping in the internal Schwarzschild spacetimes
Extremely compact objects contain trapped null geodesics. When such objects enter the evolution period corresponding to the geodetical motion of neutrinos of the extremely compact objects. neutrino luminos...
BE - Teoretická fyzika
- 2009 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Trapping of neutrinos in extremely compact stars
Extremely compact objects (9GM/4c^2<R<3GM/c^2) contain trapped null geodesics that cannot escape the objects. Certain part of neutrinos produced in their interior will therefore be trapped, thus influencing neutrino l...
BE - Teoretická fyzika
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
The "Prague Synergy 2013: Accreting Relativistic Compact Objects and their Environment"
The scientific aim of the conference is to discuss recent developments in relativistic astrophysics in the fields of physics of compact objects and theories of gravity, accretion theory, and the X-ray variability and spectra....
BN - Astronomie a nebeská mechanika, astrofyzika
- 2013 •
- M •
- Link
Rok uplatnění
M - Uspořádání konference
Výsledek na webu
A categorical approach to convergence: compactness
, separation and compactness of objects of the concrete category under investigationA convergence class is introduced on every object of a given category by using certain generalized nets for expressing the convergence. The...
Pure mathematics
- 2016 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Compactness with respect to a convergence structure
We study separatedness and compactness of objects of a given category with respect to a convergence structure and show that they behave more naturally that the usual separatedness and compactness of topological spaces....
BA - Obecná matematika
- 2000 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Off-equatorial orbits in strong gravitational fields near compact objects - II
Within the famework of general relativity, we study off-equatorial orbits of charged particles in strong gravitational fields of compact objects. In particular we examine the case of halo motion around magnetic compact star...
BN - Astronomie a nebeská mechanika, astrofyzika
- 2010 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Gravitational lensing around Kehagias-Sfetsos compact objects surrounded by plasma
We study the optical properties of the Kehagias–Sfetsos (KS) compact objects, characterized by the “Hořava” parameter omega_(KS), in the presence of plasma, considering its homogeneous or power-law density distribution. The strong e...
Astronomy (including astrophysics,space science)
- 2019 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Neutrino trapping in extremely compact objects: I. Efficiency of trapping in the internal Schwarzschild spacetimes
Extremely compact objects (9GM/4c(2) < R < 3GM/c(2)) contain trapped null compact objects and cooling trapping coefficients of both 'local' and 'global' kinds that the trapping of neutrinos can be relevant to moder...
BE - Teoretická fyzika
- 2009 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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