regular smooth curve - Penn Math
regular smooth curve - Penn Math
regular smooth curve - Penn Math
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Remark. If �0 and �1 : S 1 � R 2 are <strong>regular</strong>ly<br />
homotopic, then they have the same winding number.<br />
WHITNEY-GRAUSTEIN THEOREM. Two <strong>regular</strong><br />
<strong>curve</strong>s �0 and �1: S 1 � R 2 are <strong>regular</strong>ly homotopic<br />
if and only if they have the same winding number.<br />
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