Affine collineations in Robertson–Walker space‐time
Affine collineations in Robertson–Walker space‐time
复制标题
罗伯逊-沃克时空中的仿射合作
DOI：
10.1063/1.527414
复制
发表时间：
1987
影响因子：
1.3
通讯作者：
R. Maartens
中科院分区：
文献类型：
--
作者：
R. Maartens
在最近的一篇论文[M。L. Bedran和B。Lesche，J. Math. Phys. 27，2360（1986）]，试图在Robertson-Walker时空中找到仿射直射。然而，在线性比例因子R（t）≠ t的情况下，仅发现位似仿射直射。指出当R（t）≠ b时，存在另一个位似仿射直射变换，并在爱因斯坦静态时空中找到了一个真（非位似）仿射直射变换.
In a recent paper [M. L. Bedran and B. Lesche, J. Math. Phys. 27, 2360 (1986)], an attempt was made to find an affine collineation in Robertson–Walker space‐time. However, only a homothetic affine collineation was found, in the case of a linear scale factor, R(t)∼t. It is pointed out that another homothetic affine collineation exists when R(t)∼tb, and a proper (nonhomothetic) affine collineation in the Einstein static space‐times has been found.