regular smooth curve - Penn Math
regular smooth curve - Penn Math
regular smooth curve - Penn Math
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Tubes about any <strong>curve</strong> in the plane.<br />
Parametrize the <strong>curve</strong> by arc length: x = x(s) for 0 � s � L .<br />
Let T(s) = x'(s) and N(s) denote unit tangent and normal<br />
vectors along the <strong>curve</strong>.<br />
Frenet eqns: T'(s) = �(s) N(s) and N'(s) = � �(s) T(s) .<br />
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