How to make fonts bigger in **plain tex** math mode? [SOLVED]

[Steve Litt]

Ulrike Fischer said on Fri, 28 Apr 2023 12:34:55 +0200

>Am Fri, 28 Apr 2023 10:28:32 +0100 schrieb Philip Taylor (Hellenic
>Institute):
>
>>> When I ran your code under luatex, here's what happened:  
> 
>> Sorry, Steve, you originally wrote "How do I make fonts bigger in 
>> **plain tex** math mode", not "[...] in **plain LuaTeX** [...]". Had
>> I known that you were using LuaTeX I would not even have tried to
>> answer your question as I never use LuaTeX simply /because/ it is
>> not compatible with TeX /qua/ TeX.  
>
>Well your code doesn't work with pdftex (or xelatex) neither. 
>
>You introduced U+A0 (no break spaces) after some of the fontnames,
>and now TeX is looking e.g. for cmr7U+A0 and is a bit unhappy.
>
>If I remove all no break space the code compiles both with luatex
>and pdftex.

Thanks Ulricke,

As per your suggestion, I went in and deleted all the spaces in all the
\font definitions. And yet some (seemingly) spaces remained. So I
manually deleted all those seeming spaces, then replaced every "scaled"
with " scaled ", and it compiled and worked perfectly, with compilers
tex, xetex, pdftex and luatex. So now I can scale my math fonts. Thanks
for observing these pseudo spaces Ulricke.

And Philip, thanks so much for helping me. I couldn't have even begun
to solve this problem without your code.

Yuri, I'm going to try your technique next.

Everyone, you can safely ignore the extremely long email I sent 15
minutes ago. Thanks everyone!

SteveT

Steve Litt 
Autumn 2022 featured book: Thriving in Tough Times
http://www.troubleshooters.com/bookstore/thrive.htm