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An Obata type result for the first eigenvalue of the sub-Laplacian on a CR manifold with a divergence-free torsion
Stefan Ivanov, Dimiter VassilevVolume:
103
Language:
english
DOI:
10.1007/s00022-013-0145-7
Date:
December, 2012
File:
PDF, 375 KB
english, 2012