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Mathematical and Computational Applications is published by MDPI from Volume 21 Issue 1 (2016). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on as a courtesy and upon agreement with the previous journal publisher.
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Math. Comput. Appl. 2000, 5(3), 149-155;

On the Ricci Curvature Tensor of (k+1)-Dimensional Semi Ruled Surfaces Evn+1

Osmangazi University, Dept. of Mathematics, 26480 EskiFhir, Turkey
Author to whom correspondence should be addressed.
Published: 1 December 2000
PDF [271 KB, uploaded 1 April 2016]


If we choose a natural companion basis for \((k+1)\)-dimensional semi-ruled surfaces in semi-Euclidean space \(E_{\nu}^{n+1}\), then the metric coefficients are \(g_{ij} = \epsilon_{i}\delta_{ij}\), \(1\leq i\), \(j \leq k\). In this paper we show that the Ricci curvature tensor of a \((k+1)\)-dimensional semi-ruled surfaces in semi-Euclidean space \(E_{\nu}^{n+1}\) is \( S = \sum_{j,h=0}^{k}{\epsilon_{jh}} \left( \epsilon_{0} R_{h-j}^{0} g_{00} + \sum_{i=0}^{k}{R_{hij}^{i}} + \sum_{i=0}^{k}{g_{i0}} \left(\epsilon_{i} R_{hij} + \epsilon_{0} R_{h0j}^{i} \right)\right) \theta_{j} \otimes \theta_{h}. \) Here, \(\{\theta_{0}, \theta_{1}, ... \theta_{k}\}\) is the dual basis of the local coordinate basis \(\{e_{0} , e_{1} , ...e_{k}\}\).
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Görgülü, A.; Ekici, C. On the Ricci Curvature Tensor of (k+1)-Dimensional Semi Ruled Surfaces Evn+1. Math. Comput. Appl. 2000, 5, 149-155.

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