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多参数等变分歧问题的开折的无穷小稳定性(英文)
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作者 高守平 《湘南学院学报》 2004年第2期1-4,共4页
基于奇点理论中的映射芽的左右等价关系,本文对等变分歧问题引入一种新的等价关系,提出了多参数等变分歧问题的开折关于该等价关系的无穷小稳定性的新概念,给出了多参数等变分歧问题的开折是无穷小稳定的充分必要条件.
关键词 奇点理论 多参数等变分歧问题 A(r)等价 开折 映射芽 无穷小稳定性
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Singularities of de Sitter Gauss map of timelike hypersurface in Minkowski 4-space 被引量:9
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作者 KONG LingLing PEI DongHe 《Science China Mathematics》 SCIE 2008年第2期241-249,共9页
We study the singularities of de Sitter Gauss map of timelike hypersurface in Minkowski 4-space through their contact with hyperplanes.
关键词 timelike hypersurface de Sitter Gauss map timelike height function 53A35 58c27
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The local classifications of the ruled surfaces of normals and binormals of a regular space curve
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作者 Jian-fei XIONG School of Mathematical Sciences, Qingdao University, Qingdao 266071, China 《Science China Mathematics》 SCIE 2007年第4期533-548,共16页
The ruled surfaces of normals and binormals of a space curve is locally classified under the left-right action according to the types of the curve. In order to do this some useful results are obtained on the relations... The ruled surfaces of normals and binormals of a space curve is locally classified under the left-right action according to the types of the curve. In order to do this some useful results are obtained on the relationship of the powers of terms in the Taylor series of an invertible function and its inverse. 展开更多
关键词 local classification left-right equivalence orthogonal-right equivalence ruled surface normal and binormal 53A04 58c27
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