【摘要】Hilbert problem 15 required understanding Schubert’s book. In this book, reducing to degenerate cases was one of the main methods for enumeration. We found that nonstandard analysis is a suitable tool for making rigorous of Schubert’s proofs of some results, which used degeneration method, but are obviously not rigorous. In this paper, we give a rigorous proof for Example 4 in Schubert’s book, Chapter 1. §4 according to his idea. This shows that Schubert’s intuitive idea is correct, but to make it rigorous a lot of work should be done.
【关键词】
《建筑知识》 2015-05-12
《中国医疗管理科学》 2015-05-12
《中国医疗管理科学》 2015-05-12
《中国医疗管理科学》 2015-05-12
《中外医疗》 2015-07-06
《重庆高教研究》 2015-06-29
《当代体育科技》 2015-07-07
《重庆电子工程职业学院学报》 2015-07-02
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