Zobrazeno 1 - 10
of 3 044
pro vyhledávání: '"Di Prisco A"'
Publikováno v:
Symmetry 16, 562, (2024)
We explore an idea put forward many years ago by Zeldovich and Novikov concerning the existence of compact objects endowed with arbitrarily small mass. The energy-density of such objects, which we call ``Ghost stars'', is negative in some regions of
Externí odkaz:
http://arxiv.org/abs/2405.09480
Autor:
Herrera, L., Di Prisco, A.
Publikováno v:
Phys. Rev. D 109, 064071, (2024)
The concept of cracking refers to the tendency of a fluid distribution to "split'', once it abandons the equilibrium. In this manuscript we develop a general formalism to describe the occurrence of cracking within a dissipative fluid distribution, in
Externí odkaz:
http://arxiv.org/abs/2404.04901
Publikováno v:
Symmetry, 16, 341, (2024)
A semi--numerical approach proposed many years ago for describing gravitational collapse in the post--quasi--static approximation, is modified in order to avoid the numerical integration of the basic differential equations the approach is based upon.
Externí odkaz:
http://arxiv.org/abs/2403.07550
Publikováno v:
Phys. Rev. D 109, 024005 (2024)
It is shown that the evolution of an axially and reflection symmetric fluid distribution, satisfying the Tolman condition for thermal equilibrium, is not accompanied by the emission of gravitational radiation. This result, which was conjectured by Bo
Externí odkaz:
http://arxiv.org/abs/2401.05959
Publikováno v:
Entropy 25, 1338 (2023)
We carry out a systematic study on the motion of test particles in the region inner to the naked singularity of a quasi--hyperbolically symmetric $\gamma$-metric. The geodesic equations are written and analyzed in detail. The obtained results are con
Externí odkaz:
http://arxiv.org/abs/2309.08409
We present several combinatorial properties of semiselective ideals on the set of natural numbers. The continuum hypothesis implies that the complement of every selective ideal contains a selective ultrafilter, however for semiselective ideals this i
Externí odkaz:
http://arxiv.org/abs/2306.12340
Autor:
Cano, Julián C., Di Prisco, Carlos A.
Topological Ramsey theory studies a class of combinatorial topological spaces, called topological Ramsey spaces, unifying the essential features of those combinatorial frames where the Ramsey property is equivalent to Baire property. In this article,
Externí odkaz:
http://arxiv.org/abs/2305.09611
Autor:
Di Prisco, Carlos
Publikováno v:
The Bulletin of Symbolic Logic, 2023 Dec 01. 29(4), 703-724.
Externí odkaz:
https://www.jstor.org/stable/27285443
Publikováno v:
Symmetry, 15, 754, (2023)
We search exact analytical solutions of spherically symmetric dissipative fluid distributions satisfying the vanishing expansion condition (vanishing expansion scalar $\Theta$). To do so we shall impose additional restrictions allowing the integratio
Externí odkaz:
http://arxiv.org/abs/2302.04520
Autor:
Rosa Rita Bucolo, Stefano Terzoni, Mauro Parozzi, Paolo Ferrara, Maura Lusignani, Roberta Lodini, Laura Di Prisco, Lara Carelli, Cristina Cattaneo
Publikováno v:
Dissertation Nursing, Vol 3, Iss 2 (2024)
INTRODUZIONE: L'abuso sugli anziani rappresenta una problematica critica; finora nessun articolo ha discusso le scale ed i metodi di valutazione esistenti alla luce dei fattori di base (es: famiglia, contesto sociale) e della presentazione clinica de
Externí odkaz:
https://doaj.org/article/ac86de22f3594785a76c78c8ad6b4486