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L^2(p)上的向量丛 被引量:2
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作者 姚立 刘喜波 刘喜祥 《河北省科学院学报》 CAS 2002年第3期135-137,共3页
讨论了透镜空间L2 (p)的 1维及 2维上同调群生成元c ,d的运算性质 ,并利用有关向量丛的Whitney和及张量积的示性类计算公式 ,借助于L2 (p)的KO 结构计算出了L2 (p)上任一向量丛的全Stiefel—Whitney类。
关键词 上周调解 示性类 向量丛 透镜空间 拓扑学 KO-结构 Stiefel-Whitney类
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Periodic Boundary Value Problem for Functional Differential Equations with Impulses
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作者 何智敏 葛渭高 《Journal of Beijing Institute of Technology》 EI CAS 1999年第4期347-351,共5页
Aim To investigate the periodic boundary value problem for functional differential equations with impulses. Methods The method of upper and lower solutions and the monotone iterative technique were used to establish... Aim To investigate the periodic boundary value problem for functional differential equations with impulses. Methods The method of upper and lower solutions and the monotone iterative technique were used to establish our results. Results and Conclusion The results of the existence of maximal and minimal solutions of the periodic boundary value problem for functional differential equations with impulses are obtained. 展开更多
关键词 functional differential equation upper and lower solutions monotone iterative technique periodic boundary value problem IMPULSE
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