Infantry
发表于 2025-3-27 00:37:02
Preliminaries, on . if . ≥ 0 (. ≤ 0) for any non-zero . ∈ .. On the other hand, if .=0 (g(v, v) ≤ 0) for any . ∈ . and there exists a non-zero . ∈ . with .=0, we say that g is positive (negative) semi-definite on V.
黄瓜
发表于 2025-3-27 03:51:17
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Indelible
发表于 2025-3-27 05:44:57
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鲁莽
发表于 2025-3-27 11:21:38
Book 2010armonic maps. ..Basic constructions and definitions are presented as preliminary background in every chapter. The presentation explores applications and suggests several open questions. ..This self-contained monograph provides up-to-date research in lightlike geometry and is intended for graduate students and researchers just entering this field..
冷漠
发表于 2025-3-27 15:27:26
https://doi.org/10.1007/978-3-658-43825-8ot be decomposed uniquely into a component tangent to . and a component of normal space .. Therefore, the standard definition of the second fundamental form and the Gauss-Wiengarten formulas do not work, in the usual way, for the lightlike case.
debouch
发表于 2025-3-27 18:57:59
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ERUPT
发表于 2025-3-27 22:13:13
Book 2010structure, such as almost Hermitian, almost contact metric or quaternion Kähler. Using these structures, the book presents interesting classes of submanifolds whose geometry is very rich. ..The book also includes hypersurfaces of semi-Riemannian manifolds, their use in general relativity and Osserma
关心
发表于 2025-3-28 03:00:14
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陶器
发表于 2025-3-28 10:03:21
Rationalitäten des Kinderschutzesnsiderable work has been done on new concepts to obtain a variety of classes of lightlike submanifolds. In this chapter we present up-to-date new results on all possible (complex, screen real and totally real) lightlike submanifolds of an indefinite Kähler manifold.
消瘦
发表于 2025-3-28 13:01:20
Mark N. O. Davies,Patrick R. Greenprotocol for factoring-based cryptography that we prove secure in the aforementioned model. This latter relies on a new efficient zero-knowledge argument for the double discrete logarithm problem that achieves an exponential improvement in communication complexity compared to the state of the art, and is of independent interest.