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91.
Javier Gutiérrez García Iraide Mardones‐Pérez María Angeles de Prada Vicente Dexue Zhang 《Mathematical Logic Quarterly》2010,56(2):131-147
This paper presents a systematic investigation of fuzzy (non‐commutative) Galois connections in the sense of R. Bělohlávek [1], from the point of view of enriched category theory. The results obtained show that the theory of enriched categories makes it possible to present the theory of fuzzy Galois connections in a succinct way; and more importantly, it provides a useful method to express and to study the link and the difference between the commutative and the non‐commutative worlds (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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93.
Some characterizations of certain rank-one symmetric Riemannian manifolds by the existence of nontrivial solutions to certain partial differential equations on Riemannian manifolds are surveyed. 相似文献
94.
从磁库仑定律出发,用洛伦兹变换导出磁单极的电磁场及其散度,旋度公式和磁单极在电磁场中的受力公式;给出它们的相对论协变形式;最后对讨论推广的麦克斯韦方程组。 相似文献
95.
We study the lattice QCD ΛcN phase shifts for the 3S1-3D1 coupled channel using both the leading order covariant chiral effective theory and the next-to-leading order non-relativistic chiral effective field theory(ChEFT).We show that although it is possible to describe simultaneously the 3S1 and 3D1 phase shifts and the inelasticity η1,the fitted energy range is quite small,only up to E<... 相似文献
96.
XIE Tao LI Min-Li 《理论物理通讯》2008,50(9):565-567
Based upon the covariant prolongation structures theory, we construct the sl(2, R)×R(p) prolongation structure for Konno-Asai-Kakuhata equation. By taking two and one-dimensional prolongation spaces, we obtain the inverse scattering equations given by Konno et al. and the corresponding Riccati equation. The Baecklund transformations are also presented. 相似文献
97.
A. V. Gavrilov 《Siberian Mathematical Journal》2008,49(6):997-1007
We obtain a composition formula for the higher covariant derivatives on a vector bundle over a manifold. The formula generalizes the classical Leibniz product rule for the derivative. We also obtain, as a corollary, a generalization of the author’s theorem about the double exponential map to the case of multiple maps. 相似文献
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Consider SE(3)as a submanifold of the Euclidean space E12.At first,the intrinsic and extrinsic geometries of SE(3)are studied.Then the Frenet typed equations for curves in SE(3)are derived.The relationship between the k-th order covariant curvatures of a curve in SE(3)and the parametric equation of its pre-image in se(3)is established.Finally,some kinds of curves in SE(3)with vanish 5-th order covariant curvature are constructed.The behaviours of these curves are exhibited. 相似文献