Error "Please insert PRERENDERUNICODE"
This is due to a slight incompatibility of utf8x
with amsart
(that capitalizes the author's name).
You have two paths to follow:
say
\usepackage[utf8]{inputenc}
make the offending character known to
ucs
andutf8x
before\begin{document}
Path 1 is preferable, if you don't use characters that aren't covered by this option (and even if you do, as it's usually easy to add the needed ones).
If you stick with utf8x
, then say as it's said in quite a cryptic way in the output: add
\PrerenderUnicode{ü}
in the preamble (after loading \inputenc
). Add all the accented characters that might offend ucs
(that's automatically loaded).
if you want to use utf8x
you need to also use ucs
. However utf8x has not been maintained for a long time and it is much preferable to use utf8
instead:
simply replace
\usepackage[utf8x]{inputenc}
with
\usepackage[utf8]{inputenc}
and it will display properly.