Beiträge zur Algebra und Geometrie Contributions to Algebra and Geometry Vol. 44, No. 1, pp. 924 (2003) 

More on Convolution of Riemannian ManifoldsBangYen ChenDepartment of Mathematics, Michigan State University, East Lansing, MI 488241027, U.S.A. email: bychen@math.msu.eduAbstract: In an earlier paper [1], the author introduced the notion of convolution of Riemannian manifolds. In [1] he also provided some examples and applications of convolution manifolds. In this paper we use tensor product to construct more examples of convolution manifolds and investigate fundamental properties of convolution manifolds. In particular, we study the relationship between convolution manifolds and the gradient of their scale functions. Moreover, we obtain a necessary and sufficient condition for a factor of a convolution Riemannian manifold to be totally geodesic. We also completely classify flat convolution Riemannian surfaces. \smallskip [1] Chen, B. Y.: Convolution of Riemannian manifolds and its applications. To appear. Keywords: convolution manifold, convolution Riemannian manifold, convolution metric, conic submanifold, totally geodesic submanifolds, flat convolution Riemannian surface, tensor product immersion Classification (MSC2000): 53B20, 53C50; 53C42, 53C17 Full text of the article:
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