\IfFileExists{\titlepagefile}{\input{\titlepagefile}}{}
}%
+% We have specified @openright to allow the chapters to start in
+% either page (recto or verso), but we don't want that behavior for
+% parts - The part heading should start in the right page (recto)
+% always.
+%
+% When a \part clears the preceding page, we don't want the page
+% number in it either.
+
+\renewcommand\part{%
+ \clearpage
+ \thispagestyle{empty}%
+ \ifodd\value{page}
+ \null%
+ \else
+ \null\newpage\thispagestyle{empty}%
+ \fi
+ \null\vfil
+ \secdef\@part\@spart}
+
+\def\@endpart{\vfil\newpage}
+
% Allow line break on hyphen (-) in URLs, to make sure long URLs in
% footnotes do not pass out of the margins.
\usepackage[hyphens]{url}