Define new math classes, or default attachment styles

Questions
1

Is there a way to set a default attachment style for a symbol? I would
like to $<_A$ always look like $script(<)_A$ or $attach(<,br: A)$.
Or in general do this kind of things, like creating new math classes. For example the following works to some extent:

#let mylt = math.class("normal", sym.lt)
#show sym.lt: mylt

$a <_A b$

The problem is that then, $<$ looses its properties of the “relation” class,
so the spacing gets weird.

2

Hi, welcome to the Typst forum!

You can use scripts and limits to change the attachment behavior (see doc here):

#show sym.lt: math.scripts
$a <_A b$

image

I think this preserves the relation class of <.

3

Oh, that was easy. Thanks!, it does preserve the other aspects of the relation class. I missed that possibility from the docs.