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On Weak concircular Symmetries of Trans-Sasakian manifoldsKeywords: weakly symmetric manifold , weakly concircular symmetric manifold , weakly Ricci symmetric manifold , concircular Ricci tensor , weakly concircular Ricci symmetric manifold , a-Sasakian manifold , p-Kenmotsu manifold , trans-Sasakian manifold Abstract: The object of the present paper is to study weakly concircular symmetric and weakly concircular Ricci symmetric trans-Sasakian manifolds. El objeto del presente trabajo es el estudio de variedades simetricas debilmente concirculares y variedades simetricas trans-Sasakian debilmente concircular de Ricci.
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