On an Algebraic Curve, the sum of the number of coincidences at a noncuspidal point is the sum of the orders of the infinitesimal distances from a nearby point to the corresponding points when the distance is taken as the principal infinitesimal.

**References**

Coolidge, J. L. *A Treatise on Algebraic Plane Curves.* New York: Dover, p. 131, 1959.

© 1996-9

1999-05-26