Revision as of 02:58, 8 February 2010 by Meg Taylor (spelling: forumla -> formula)
The proof follows immediately from the adjunction formula. For a classical proof see the book of Arbarello, Cornalba, Griffiths and Harris.
- Semple and Roth, Introduction to Algebraic Geometry, Oxford University Press (repr.1985) ISBN 0-19-85336-2. Pp.53-54