Am 13.04.2014 um 21:01 schrieb <joasyannick@gmail.com> <joasyannick@gmail.com>:

Hello,

Thank you for the answer.

>if you have a proper opentype math Font…

As you know, Baskervald doesn’t come with an open type math version.
Moreover the mapping mechanism works well with open type text fonts and is
powerful and very general. It’s my prefered way of solving my problem. So I reiterate
my questions:

Replacing certain symbols in a math font with a text font is very easy with the fallback mechanism
and the \definefallbackfamily command makes things even simpler:

http://tex.stackexchange.com/questions/150566/minionpro-including-math-in-context/150823#150823

Wolfgang