[texhax] math \fontdimen
karl at freefriends.org
Mon Feb 9 00:26:46 CET 2009
Now I wonder a little whether I can be sure that (outside PlainTeX) 2 will
be the symbols family.
Yes. It is built into TeX: The Program that family 2 is the symbols
family (and 3 is math extension). The math typesetting code takes
dimens from those families.
I believe it is not strictly necessary that family 1 be math italic, but
I'm not sure anyone has gone against it in practice.
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