. . "2008-05-19+02:00"^^ . . "0"^^ . . . "Projekt se zab\u00FDval studiem vlastnost\u00ED exaktn\u00EDch \u0159e\u0161en\u00ED pohybov\u00FDch rovnic, kter\u00E9 vypl\u00FDvaj\u00ED z modern\u00EDch gravita\u010Dn\u00EDch teori\u00ED. Pozornost byla p\u0159edev\u0161\u00EDm v\u011Bnov\u00E1na strunov\u011B inspirovan\u00E9 teorii gravitace a jej\u00ED n\u00EDzkoenergetick\u00E9 limit\u011B, Einsteinov\u011B-Maxwellov\u011B-dila"@cs . . "1"^^ . "GP202/03/P113" . . . . . "Exact solutions to the Einstein equations, or to their stringy generalization, is an important branch of the general theory of relativity as well as of the rapidly growing string cosmology. In the field of general relativity rotating universes, that werein particular treated by the author, exhibit an interplay between gravitation, rotation and electromagnetism. In connection with rotating universes especially an investigation of a quantizing of quantum fields propagating on acausal spacetime backgroundsshould provide an important tool for deeper understanding of quantum field theory, since the question appears whether the chronology violation could be avoided by the quantum corrections. In the field of string theory the study of generalization of thegravitational equations is interesting in itself, nevertheless there exist a number of further serious reasons. Spacetimes following from the modified higher dimensional Einstein equations, in case that some coordinates are periodic functions, have a"@en . "Neuvedeno."@en . . . . "0"^^ . "Higher-dimensional spacetimes in string cosmology"@en . "The project studied properties of exact solutions to equations of motion following from modern theories of gravitation. The attention was devoted in particular to string inspired gravity and to its low-energy limit, Einstein-Maxwell-dilaton gravity. Exac"@en . "V\u00EDcedimenzion\u00E1ln\u00ED prostoro\u010Dasy ve strunov\u00E9 kosmologii" . . . . . . "http://www.isvav.cz/projectDetail.do?rowId=GP202/03/P113"^^ . "Exaktn\u00ED \u0159e\u0161en\u00ED Einsteinov\u00FDch rovnic, pop\u0159\u00EDpad\u011B jejich strunov\u00E9ho zobecn\u011Bn\u00ED, je d\u016Fle\u017Eitou discipl\u00EDnou jak v\u00A0obecn\u00E9 teorii relativity, tak i v\u00A0bou\u0159liv\u011B se rozv\u00EDjej\u00EDc\u00ED strunov\u00E9 kosmologii. Na poli obecn\u00E9 relativity pr\u00E1v\u011B rotuj\u00EDc\u00ED vesm\u00EDry, jimi\u017E se autordoposud zab\u00FDval, poukazuj\u00ED na hru t\u0159\u00ED v\u00FDzna\u010Dn\u00FDch faktor\u016F - gravitace, rotace a elektromagnetismu. V\u00A0souvislosti s\u00A0rotuj\u00EDc\u00EDmi vesm\u00EDry zejm\u00E9na zkoum\u00E1n\u00ED kvantov\u00E1n\u00ED pol\u00ED \u0161\u00ED\u0159\u00EDc\u00EDch se na pozad\u00ED akauz\u00E1ln\u00EDch prostoro\u010Das\u016F by m\u011Blo b\u00FDt d\u016Fle\u017Eit\u00FDm kl\u00ED\u010Dem pro hlub\u0161\u00EDpochopen\u00ED kvantov\u00E9 teorie pole, nebo\u0165 se nask\u00FDt\u00E1 ot\u00E1zka zda by naru\u0161en\u00ED chronologie mohlo b\u00FDt odstran\u011Bno kvantov\u00FDmi efekty. Na poli strunov\u00E9 kosmologie, studium \u0159e\u0161en\u00ED zobecn\u011Bn\u00FDch gravita\u010Dn\u00EDch rovnic je zaj\u00EDmav\u00E9 samo o sob\u011B, nicm\u00E9n\u011B existuje i \u0159adadal\u0161\u00EDch z\u00E1va\u017En\u00FDch d\u016Fvod\u016F. Prostoro\u010Dasy vypl\u00FDvaj\u00EDc\u00ED z\u00A0modifikovan\u00FDch v\u00EDcedimenzion\u00E1ln\u00EDch Einsteinov\u00FDch rovnic, pro p\u0159\u00EDpad, \u017Ee n\u011Bkter\u00E9 ze sou\u0159adnic jsou periodick\u00E9, nach\u00E1zej\u00ED p\u0159\u00EDmou aplikaci v\u00A0br\u00E1nov\u00FDch sv\u011Btech. D\u00E1le by tato \u0159e\u0161en\u00ED mohla pomoci zodpov\u011Bd\u011Bt" . . "5"^^ . "5"^^ .