The operation of drilling a tubular Neighborhood of a Knot in and then gluing in a solid Torus so that its meridian curve goes to a -curve on the Torus boundary of the Knot exterior. Every compact connected 3-Manifold comes from Dehn surgery on a Link in .

**References**

Adams, C. C. *The Knot Book: An Elementary Introduction to the Mathematical Theory of Knots.* New York:
W. H. Freeman, p. 260, 1994.

© 1996-9

1999-05-24