regular smooth curve - Penn Math
regular smooth curve - Penn Math
regular smooth curve - Penn Math
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Problem 12. Let �: I � R 3 be parametrized by arc-<br />
length and have nowhere vanishing curvature �(s) � 0 .<br />
Show that<br />
T'(s) = �(s) N(s)<br />
N'(s) = — �(s) T(s) + �(s) B(s)<br />
B'(s) = — �(s) N(s) .<br />
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