Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Robert H. Gowdy"'
Autor:
Robert H. Gowdy
Publikováno v:
American Journal of Physics. 63:229-232
The most efficient way to operate a rocket is to increase its exhaust velocity as it accelerates. When this increase is done properly, the final kinetic energy of the rocket is maximized. It is shown that the resulting ‘‘perfect rocket’’ is f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9819d6e8a71854bb0a56ad713d90aea5
https://doi.org/10.1119/1.17929
https://doi.org/10.1119/1.17929
Autor:
Robert H. Gowdy
Publikováno v:
Journal of Mathematical Physics. 35:1274-1301
This paper constructs the geometrically natural objects which are associated with any projection tensor field on a manifold with any affine connection. The approaches to projection tensor fields which have been used in general relativity and related
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a6ab6147ac5c61b628b7eb03879059f
https://doi.org/10.1063/1.530589
https://doi.org/10.1063/1.530589
Autor:
Robert H. Gowdy, B. Douglas Edmonds
New boundary conditions are imposed on the familiar cylindrical gravitational wave vacuum spacetimes. The new spacetime family represents cylindrical waves in a flat expanding (Kasner) universe. Space sections are flat and nonconical where the waves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edcd65e077ed11e73b9759c8bfd0b359
Autor:
Robert H. Gowdy
The generalized projection-tensor geometry introduced in an earlier paper is extended. A compact notation for families of projected objects is introduced and used to summarize the results of the previous paper and obtain fully projected decomposition
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d5e58a2f7f1400d83ee3df94ea1be6e
http://arxiv.org/abs/gr-qc/9408014
http://arxiv.org/abs/gr-qc/9408014
Autor:
Robert H. Gowdy
Publikováno v:
Journal of Mathematical Physics. 36:5200-5200
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::314433d25db0269502e45d47a7c63d88
https://doi.org/10.1063/1.531223
https://doi.org/10.1063/1.531223
Publikováno v:
Journal of Mathematical Physics. 19:1580-1583
Several properties of instantaneous Cauchy surfaces are obtained. It is shown that a strongly causal spacetime admits an instantaneous Cauchy surface through each of its points, that there is a close and reversible relationship between these surfaces
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e21b28bd0f1184e3f0d3698d6980ef6a
https://doi.org/10.1063/1.523845
https://doi.org/10.1063/1.523845
Autor:
Robert H. Gowdy
Publikováno v:
General Relativity and Gravitation. 10:431-443
The geometry of a projection tensor field in curved space-time is expressed in a way that does not restrict the dimensionality of the projection. The thermohydrodynamics of a perfect fluid then takes a compact and symmetrical form which also describe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbb9dee86da1fbf0ad7a42c32bb20c4f
https://doi.org/10.1007/bf00760224
https://doi.org/10.1007/bf00760224
Autor:
Robert H. Gowdy
Publikováno v:
Journal of Mathematical Physics. 19:2294-2304
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0fe4cbdd98f677abc5d0396fda059be
https://doi.org/10.1063/1.523608
https://doi.org/10.1063/1.523608
Autor:
Robert H. Gowdy
Publikováno v:
Journal of Mathematical Physics. 23:2151-2154
The coordinate‐independent formulation of spacetime perturbation theory is applied to the analysis of surface terms which appear in variations of the Einstein Action of general relativity. Restricted variations of the type used to study the dynamic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c2a08ac90740cb09ea061907fccb246
https://doi.org/10.1063/1.525271
https://doi.org/10.1063/1.525271
Autor:
Robert H. Gowdy
Publikováno v:
Annals of Physics. 83:203-241
Spacetimes with closed spacelike hypersurfaces and spacelike two-parameter isometry groups are investigated to determine their possible global structures. It is shown that the two spacelike Killing vectors always commute with each other. Connected gr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::070289c7baeba3eb56ef7d6d5e79c33c
https://doi.org/10.1016/0003-4916(74)90384-4
https://doi.org/10.1016/0003-4916(74)90384-4