[XeTeX] Mixing two math fonts

[Tobias Schoel]

Hi,

is there a "nice and easy" way to mix two math fonts with unicode-math?

Let's take the following comparison with brand new TG Pagella Math and 
Asana Math:

\documentclass{minimal}
\usepackage{fontspec}
\usepackage{unicode-math}
\setmainfont{TeX Gyre Pagella}
\setmathfont{TG Pagella Math}
\begin{document}
\[\int_a^B\left(\sum_0^1\sin(\pi\cdot 
x)-\frac{6^{7^8}}{\lim\limits_{\emptyset\to\infty}\langle\emptyset\rangle}\,\mathup{d}x\right)\in\BbbR\]
\setmathfont{Asana Math}
\[\int_a^B\left(\sum_0^1\sin(\pi\cdot 
x)-\frac{6^{7^8}}{\lim\limits_{\emptyset\to\infty}\langle\emptyset\rangle}\,\mathup{d}x\right)\in\BbbR\]
\end{document}

I'd like to take the big operators and delimiters from TG Pagella Math, 
but the letters, numbers, symbols (empty set, real numbers, infinity, 
element of) and probably most else from Asana Math.

@ tex-gyre-team, Apostolos: Could you maybe take each other's font as an 
"inspiration" for your own? ;-) For example the delimiters: The stroke 
width of TG seems more graybalanced, but Asanas delimiters are smoother 
at the junction of hook and extender.

Thank you very much. I know, that these are details of beauty, I'm 
asking for, and not necessities.

Toscho
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