Abstract
In this paper we solve the problem of local pseudohermitian embeddability into spheres. We state necessary and sufficient conditions for the embeddability as a finite number of equations and rank conditions on the curvature and torsion tensors and their derivatives.
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The second author was supported by BK21-Yonsei University
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Kim, SY., Oh, JW. Local embeddability of pseudohermitian manifolds into spheres. Math. Ann. 334, 783–807 (2006). https://doi.org/10.1007/s00208-005-0710-y
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DOI: https://doi.org/10.1007/s00208-005-0710-y