It is the reciprocal of the curvature, whose formula can be found at Curvature - Wikipedia, the free encyclopedia
Essentially, at a point p, one takes the limiting value of the radius of the circle passing through p-dp, p, and p+dp.
It is the reciprocal of the curvature, whose formula can be found at Curvature - Wikipedia, the free encyclopedia
Essentially, at a point p, one takes the limiting value of the radius of the circle passing through p-dp, p, and p+dp.