caa a22 4500 467887896 CHVBK 20180406152739.0 cr unu---uuuuu 170328e20060201xx s 000 0 eng 10.1007/s10714-005-0220-y doi (NATIONALLICENCE)springer-10.1007/s10714-005-0220-y Tsamparlis Michael Department of Physics, Section of Astrophysics-Astronomy-Mechanics, University of Athens, 15783, Zografos, Athens, Greece aut General symmetries of a string fluid space-time [Elektronische Daten] [Michael Tsamparlis] It is shown that a string fluid is the simplest anisotropic fluid with vanishing heat flux. Furthermore it has the property that the Ricci tensor is obtained from the energy momentum tensor, and vice versa, if one interchanges the fluid variables. We use previous works on the collineations of anisotropic fluids, which include the string fluid as a particular case, to compute the kinematic and the dynamic effects of certain collineations of a string fluid. It is found that the possible spacetimes, which can carry a string fluid, are severely restricted and the possible string fluids in spacetimes, which can admit them are more or less fixed. We recover previous results on the effect of symmetries in string fluid spacetimes and get many new ones, for example the matter inheritance collineations. The study and the results are presented in a systematic manner, which allows the comprehension and the comparison of the restrictions imposed by each collineation. Finally one can use the same method of work for a systematic study of similar problems. Springer-Verlag, 2005 Ricci collineation nationallicence Nambu string nationallicence General Relativity and Gravitation Springer US; http://www.springer-ny.com 38/2(2006-02-01), 279-309 0001-7701 38:2<279 2006 38 10714 https://doi.org/10.1007/s10714-005-0220-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10714-005-0220-y text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Tsamparlis Michael Department of Physics, Section of Astrophysics-Astronomy-Mechanics, University of Athens, 15783, Zografos, Athens, Greece aut NATIONALLICENCE 773 0- General Relativity and Gravitation Springer US; http://www.springer-ny.com 38/2(2006-02-01), 279-309 0001-7701 38:2<279 2006 38 10714 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer