This is TeX, Version 3.14159 (Web2C 7.3.1) (format=tex 2000.7.19) 7 FEB 2001 21:21 **\nonstopmode\input deformation.tex (deformation.tex \gothfam=\fam8 \ttglue=\skip18 1. Introduction. [1] [2] 2. The Hecke ring of level\penalty \@M \ 71. [3] [4] 3. The Hecke ring of level\penalty \@M \ 284. [5] [6] [7] [8] [9] 4. The Hecke ring of level\penalty \@M \ 142. [10] Bibliography [11] Appendix by W.\penalty \@M \ Stein. [12] ) Output written on deformation.dvi (12 pages, 57584 bytes).