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作者单位:M. B. Banaru (1)
1. Smolensk State University, ul. Przheval’skogo 4, Smolensk, 214000, Russia
ISSN:1934-810X
文摘
We prove that the condition for the type number of an almost contact metric surface in a six-dimensional K?hler submanifold of the Cayley algebra to be 0 or 1 is not only necessary but also sufficient condition for the almost contact metric structure to be cosymplectic.