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[期刊论文] 作者:ZHANG Yanfang,SUN Peiru,
来源:武汉大学自然科学学报(英文版) 年份:2021
In this paper,we investigate the envelope of two spe-cial families of chords of an ellipse and prove that the envelopes are also ellipses.The obtained results are important for computer-ized design of the generation of envelope curves and e......
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