Projective symmetry in FRW spacetimes

被引:20
|
作者
Hall, GS [1 ]
机构
[1] Univ Aberdeen, Kings Coll, Dept Math Sci, Aberdeen AB24 3UE, Scotland
关键词
D O I
10.1088/0264-9381/17/22/304
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
This paper presents a general discussion of projective symmetry in FRW spacetimes. It is shown that there is at most one proper projective vector field admitted in the sense that any other projective vector field is a linear combination of the original and a homothetic vector field. The situation is, essentially, solved completely for the FRW models with k = +/-1 and up to quadratures in the case k = 0.
引用
收藏
页码:4637 / 4644
页数:8
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