Now that we have some of the preliminaries out of the way,
we can get on to doing real mathematics.
I have been slipping small things into the example files
as we go along so that you will at least have seen
some common neqn constructions.
One of the most frequent is the word "sub", which
indicates a subscript, like this:
The main thing to notice is that the blanks are delimiters -
the subscript of "x" is "i"; the blank after the "i" marks
the end of the subscript.
Modify the file "Example" so the equation in it looks like
x sub alpha ~=~ y sub pi ~+~ z sub pi
x sub alpha ~=~ y sub pi ~+~ z sub pi
#once neqn Ref | nroff >X1 &
#once neqn message | nroff -T$term %s/tinyms -