Dear Deane, Erwin, Gaoyong, and Wenxiong,

Here is a draft with the corrections suggested by the referee.

Regards,
Ralph

Listing of directory / as of Mon Sep 6 15:14:56 EDT 2004:
Name (Last modified) Size
affine_accepted.aux   (Sep 6 15:14) 3999
affine_accepted.dvi   (Sep 6 15:14) 74564
affine_accepted.pdf   (Sep 6 15:14) 164384
affine_accepted.tex   (Sep 6 15:13) 55458