A curvature condition for a twisted product to be a warped product

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Date

2001

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Springer-verlag

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Department of Modern Languages
In DML, post prep students are offered higher level academic English to help further their education and non-prep students are given basic English courses depending on their needs. In the departments students are exposed to various teaching learning methods and techniques and offline and online facilities to help develop learning strategies, analysing, questioning, synthesising, internalising, applying and evaluating the skills and knowledge to utilize them throughout their lives.

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Abstract

It is shown that a mixed Ricci-flat twisted product semi-Riemannian manifold can be expressed as a warped product semi-Riemannian manifold. Asa consequence, any Einstein twisted product semi-Riemannian manifold is in fact, a warped product serni-Riemannian manifold.

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Garcia-Rio, Eduardo/0000-0003-1195-1664
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Garcia-Rio, Eduardo ORCID logo

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57

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Volume

106

Issue

2

Start Page

213

End Page

217

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https://doi.org/10.1007/s002290100204
 https://hdl.handle.net/20.500.14411/1126

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