Zobrazeno 1 - 7
of 7
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