| Автор | H A Buchdahl |
| Дата выпуска | 1979-08-01 |
| dc.description | The author deals with the mutual inequivalence of g-variation and P-variation of a given action S, the components of linear connection Gamma <sup>m</sup><sub>kl</sub> being required to be symmetric. Under g-variation S is required to be stationary with respect to variations of the metric tensor g<sub>ij</sub>, the Gamma <sup>m</sup><sub>kl</sub> being taken to be Christoffel symbols from the outset, whereas under P-variations the g<sub>ij</sub> and Gamma <sup>m</sup><sub>kl</sub> are initially regarded as mutually independent of S is required to be stationary with respect to independent variations of these quantities. The discussion is illustrated at length by examples in which the Lagrangian of S is one or another of a set of homogeneous or inhomogeneous quadratic invariants of the Riemann tensor. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Quadratic Lagrangians and Palatini's device |
| Тип | paper |
| DOI | 10.1088/0305-4470/12/8/017 |
| Print ISSN | 0305-4470 |
| Журнал | Journal of Physics A: Mathematical and General |
| Том | 12 |
| Первая страница | 1229 |
| Последняя страница | 1234 |
| Аффилиация | H A Buchdahl; Dept. of Theoretical Phys., Faculty of Sci., Australian Nat. Univ., Canberra, ACT, Australia |
| Выпуск | 8 |
