The constant in the Laurent Series

of is called the residue of . The residue is a very important property of a complex function and appears in the amazing Residue Theorem of Contour Integration.

**References**

Arfken, G. ``Calculus of Residues.'' §7.2 in *Mathematical Methods for Physicists, 3rd ed.*
Orlando, FL: Academic Press, pp. 400-421, 1985.

© 1996-9

1999-05-25