Characteristic Class of Isotopy for Surfaces
REN Yuxue · WEN Chengfeng · ZHEN Shengxian · LEI Na· LUO Feng · GU David Xianfeng
Journal of Systems Science & Complexity ›› 2020, Vol. 33 ›› Issue (6) : 2139-2156.
Characteristic Class of Isotopy for Surfaces
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