| Symmetries of Energy-Momentum Tensor： Some Basic Facts |
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| 引用本文： | References：. Symmetries of Energy-Momentum Tensor： Some Basic Facts[J]. 理论物理通讯, 2007, 47(5): 829-834 |
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| 作者姓名： | References： |
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| 作者单位： | Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore-54590, Pakistan |
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| 基金项目： | Acknowledgments 0ne of the authors （MS） would like to thank Prof Graham S. Hall for the useful discussion on the topic. |
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| 摘 要： | It has been pointed out by Hall et al. [Gen. Rel. Gray. 28 （1996） 299.] that matter collineations can be defined by using three different methods. But there arises the question whether one studies matter collineations by using LεTab=0, or LεT^ab = 0 or LεT^b a=0. These alternative conditions are, of. course, not generally equivalent. This problem has been explored by applying these three definitions to general static spherically symmetric spacetimes. We compare the results with each definition.
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| 关 键 词： | 能量-动量张量 对称性 物质 直射变换 位似矢量场 |
| 修稿时间： | 2006-04-19 |
Symmetries of Energy-Momentum Tensor: Some Basic Facts |
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| M.Sharif,Tariq Ismaeel. Symmetries of Energy-Momentum Tensor: Some Basic Facts[J]. Communications in Theoretical Physics, 2007, 47(5): 829-834 |
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| Authors: | M.Sharif Tariq Ismaeel |
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| Abstract: | It has been pointed out by Hall et al. [Gen. Rel. Grav. 28 (1996) 299.] that matter collineations can be defined by using three different methods. But there arises the question whether one studies matter collineations by using LεTab = 0, or LεTab = 0 or LεTba = 0. These alternative conditions are, of course, not generally equivalent. This problem has been explored by applying these three definitions to general static spherically symmetric spacetimes. We compare the results with each definition. |
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| Keywords: | symmetries energy-momentum tensor |
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