A Ricci-semi-symmetric hypersurface of Euclidean space which is not semi-symmetric

A Ricci-semi-symmetric hypersurface of Euclidean space which is not semi-symmetric
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by Bahaa E. Abdalla and Franki Dillen PDF

Proc. Amer. Math. Soc. 130 (2002), 1805-1808 Request permission

We construct the first explicit example of a Ricci-semi-symmetric hypersurface of Euclidean space which is not semi-symmetric.

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