射影空间中仿射环的特征
Characterization of affine links in the projective space
摘要:
射影环是三维实射影空间的光滑闭1-子流形。如果一个射影连杆与一个不与某个射影平面相交的连杆同素,则称该射影连杆是仿射的。主要结果是:一个射影环是仿射环当且仅当它的补环的基本群包含一个二阶非平凡元。
英文摘要:
A projective link is a smooth closed 1-submanifold of the real projective space of dimension three. A projective link is said to be affine if it is isotopic to a link, which does not intersect some projective plane. The main result: a projective link is affine if and only if the fundamental group of its complement contains a non-trivial element of order two.
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