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Special multiply Einstein warped products with an affine connection
被引:2
|作者:
Dumitru, Dan
[1
]
机构:
[1] Spiru Haret Univ Bucharest, Fac Engn Comp Sci & Geog, 46B Fabricii Str, Bucharest, Romania
关键词:
Einstein space;
multiply warped product;
warping function;
semi-symmetric connection;
QUARTER-SYMMETRIC CONNECTION;
CURVATURE;
D O I:
10.1142/S0219887818501074
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
The aim of this paper is to study special multiply Einstein warped products having an affine connection. Let M = I x (f1) F-1 x ... x (fm) F-m be a multiply warped product such that I subset of R is an open interval, dim I = 1, f(i) : I -> (0,infinity), f(i) is an element of C-infinity(I), dim F-i = k(i) >= 1 for every i is an element of {1,...,m}, m >= 1, dim M = (n) over bar = 1+ Sigma(m)(i=1) k(i) and (del) over bar an affine connection on M. We compute the warping functions that make M an Einstein space in the following cases: (a) (del) over bar is a semi-symmetric metric/non-metric connection and all the fibers are Ricci flat. (b) (del) over bar is a quarter-symmetric metric/non-metric connection and all the fibers are Ricci flat.
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页数:13
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