[XeTeX] Working example using unicode-math and the AMS packages?

[Ulrike Fischer]

Am Mon, 13 Jul 2009 10:15:28 -0500 schrieb Nicolas Vaughan:

> Hello,
> I've got two further problems with math and XeLaTeX.
> 
> 1. $ B = \{ x : \text{ existe } a \in \mathbb{N} $
> This gives me a "! Missing } inserted" error, as though the \{ was an active
> character!
> 
> 2. The \in, \subseteq, etc. binary operators give me no symbols in the
> resulting PDF.
> 
> Any ideas?

You should stop to sent code snippets. Make complete examples. 

-- 
Ulrike Fischer