• Kyungpook Mathematical Journal
• /
• 제56권3호
• /
• pp.951-964
• /
• 2016

The objective of the present paper is to study some new results on concircular curvature tensor in a Kenmotsu manifold with respect to the semi-symmetric non-metric connection.

• Kyungpook Mathematical Journal
• /
• 제49권4호
• /
• pp.789-799
• /
• 2009

In this study we consider ${\varphi}$-conformally flat, ${\varphi}$-conharmonically flat, ${\varphi}$-projectively at and ${\varphi}$-concircularly flat Lorentzian ${\alpha}$-Sasakian manifolds. In all cases, we get the manifold will be an ${\eta}$-Einstein manifold.