Homothetic Motion in a Bianchi Type-I Model in Lyra Geometry

被引：6

作者：

Gad, Ragab M. ^{[1
,2
]}

机构：

[1] King Abdulaziz Univ, Dept Math, Fac Sci, Jeddah 21589, Saudi Arabia

[2] Menia Univ, Fac Sci, Dept Math, El Minia 61915, Egypt

来源：

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2015年 / 54卷 / 08期

关键词：

Bianchi type-I; Homothetic vector field; Lyra geometry; Matter collineations; Baratropic equation of state; KILLING VECTOR-FIELDS; TELEPARALLEL THEORY; SPACE-TIMES; MATTER COLLINEATIONS; SELF-SIMILARITY; KANTOWSKI-SACHS; CLASSIFICATION; SYMMETRIES; EQUATIONS;

D O I：

10.1007/s10773-015-2528-z

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper we study a homothetic vector field of a Bianchi type-I model based on Lyra geometry. The cases when a displacement vector is function of t and when it is constant are considered. In both two cases we investigate the equation of state. A comparison between the obtained results, using Lyra geometry, and that have obtained previously in the context of General Relativity, based on Riemannian geometry, will be given.

引用

页码：2932 / 2941

页数：10

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