Math symbols and Greek letters.  Sed script for groff Also adds the
"delim $$" declaration to the top of the file. Thus it is now
unnecessary to pipe the ms file through eqn (or geqn) unless the
file file contain formulas.

1i\
.EQ\
delim $$\
.EN

[this is a historical file.  Doesn't apply to current sed script - Greg]
