Curvature and Weyl collineations of Bianchi type V spacetimes

Camci U., HUSSAIN I., Kucukakca Y.

JOURNAL OF GEOMETRY AND PHYSICS, cilt.59, sa.11, ss.1476-1484, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 59 Sayı: 11
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.geomphys.2009.07.008
  • Dergi Adı: JOURNAL OF GEOMETRY AND PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1476-1484
  • Anahtar Kelimeler: Bianchi type V spacetimes, Curvature collineations, Weyl collineations, Conformal Killing vectors, GENERAL-RELATIVITY, TIMES, TENSOR
  • Akdeniz Üniversitesi Adresli: Evet

Özet

The objective of this paper is twofold: (a) First the curvature collineations of the Bianchi type V spacetimes are studied using rank argument of curvature matrix. It is found that the rank of the 6 x 6 curvature matrix is 3, 4, 5 or 6 for these spacetimes. In one of the rank 3 cases the Bianchi type V spacetime admits proper curvature collineations which form infinite dimensional Lie algebra. (b) Then the Weyl collineations of the Bianchi type V spacetimes are investigated using rank argument of the Weyl matrix. It is obtained that the rank of the 6 x 6 Weyl matrix for Bianchi type V spacetimes is 0, 4 or 6. It is further shown that these spacetimes do not admit proper Weyl collineations, except in the trivial rank 0 case, which obviously form infinite dimensional Lie algebra. In some special cases it is found that these spacetimes admit Weyl collineations in addition to the Killing vectors, which are in fact proper conformal Killing vectors. The obtained conformal Killing vectors form four-dimensional Lie algebra. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.