Trie absolute curvature of a smooth curve with parametrization (Ï, I) at a point x0 = Ï(t0)
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when this limit exists, where 0(t) is the angle between Ï'(t) and Ï'(t0), and ï¬(t) is the arc length of if Ï(I) from Ï(t) to Ï(t0). [Thus K measures how rapidly θ (t) changes with respect to arc length.]
a) Given a, b Rn, b 0, prove that the absolute curvature of the line A from a to b is zero at each point x0 on A.
b) Prove that the absolute curvature of the circle of radius r is 1 /r at each point x0 on C.
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