Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Grasiele B. Santos"'
Publikováno v:
Classical and Quantum Gravity. 39:225008
In this manuscript we investigate the intrinsically flat (space-flat) spacetimes as viable cosmological models. We show that they have a natural geometric structure which is suitable to describe inhomogeneous matter distributions forming a periodic p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1ca770d012261c05297ed466fe1f0a1
https://doi.org/10.1088/1361-6382/ac96c3
https://doi.org/10.1088/1361-6382/ac96c3
Publikováno v:
International Journal of Modern Physics D. 30:2150033
Based upon the intrinsic symmetries approach to inhomogeneous cosmologies, we propose an exact solution to Einstein's field equations where the spatial sections are flat and the source is a non-perfect fluid such that the dissipative terms can be wri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73bc3aa37ecbe7b86028349408a60dd5
https://doi.org/10.1142/s0218271821500334
https://doi.org/10.1142/s0218271821500334
Crude comparison between four alternative proposals for the very definition of a wormhole is provided, all of which were intended to apply to the dynamical cases. An interesting dynamical solution, based upon large scale magnetic fields, is used for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37a1e0ac754ba5e17dd7305934c0f485
In a previous work the authors have solved the Einstein equations of General Relativity for a class of metrics with constant spatial curvature, where it was found a non vanishing Weyl tensor in the presence of a primordial magnetic field with an anis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7420ba2891ffef8c98c90c4693f7f12
http://arxiv.org/abs/1308.5178
http://arxiv.org/abs/1308.5178
Autor:
R. Klippert, Grasiele B. Santos
Publikováno v:
The Twelfth Marcel Grossmann Meeting.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d605ad59602a38339eafb2975270f079
https://doi.org/10.1142/9789814374552_0232
https://doi.org/10.1142/9789814374552_0232
Publikováno v:
Revista Brasileira de Ensino de Física v.26 n.4 2004
Revista Brasileira de Ensino de Física
Sociedade Brasileira de Física (SBF)
instacron:SBF
Revista Brasileira de Ensino de Física, Vol 26, Iss 4, Pp 371-377
Revista Brasileira de Ensino de Física, Volume: 26, Issue: 4, Pages: 371-377, Published: DEC 2004
Revista Brasileira de Ensino de Física
Sociedade Brasileira de Física (SBF)
instacron:SBF
Revista Brasileira de Ensino de Física, Vol 26, Iss 4, Pp 371-377
Revista Brasileira de Ensino de Física, Volume: 26, Issue: 4, Pages: 371-377, Published: DEC 2004
Neste trabalho estudamos um modelo de bifurcação sela-centro encontrado em uma família a um parâmetro de campos de vetores planares Hamiltonianos. Este estudo é feito através da análise da mudança qualitativa dos retratos de fase destes campo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2014b94a8f6487af40773c2e0558ac5c
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172004000400011
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172004000400011
Publikováno v:
Classical & Quantum Gravity; 8/9/2018, Vol. 35 Issue 15, p1-1, 1p
Publikováno v:
General Relativity & Gravitation; Feb2019, Vol. 51 Issue 2, p1-1, 1p
Marcel Grossmann Meetings are formed to further the development of General Relativity by promoting theoretical understanding in the fields of physics, mathematics, astronomy and astrophysics and to direct future technological, observational, and expe