ntheorem.pdf. - Mirrors.med.harvard.edu

527 \@namedef{th@changeNo}{\th@nonumberplain}
528 \@namedef{th@marginbreakNo}{\th@nonumberbreak}
529 \@namedef{th@changebreakNo}{\th@nonumberbreak}
For instance, break is commented:
\newtheoremstyle{break} results in
\gdef\th@break{%
\def\@begintheorem##1##2{%
\item[\hskip\labelsep \theorem@headerfont
##1\ ##2\theorem@separator]%
\hfill\penalty-8000}%
\def\@opargbegintheorem##1##2##3{%
\item[\hskip\labelsep \theorem@headerfont
##1\ ##2\ (##3)\theorem@separator]%
\hfill\penalty-8000}}
Then, calling \th@break sets \@begintheorem as follows:
Since each theorem environment is basically a trivlist, the header is set as
the item contents: \theorem@headerfont holds the font commands for the
header font, ##1 is the keyword to be displayed, and ##2 its environment
number. The linebreak after the header is achieved by offering to fill the line
with space and the distinct wish to put a linebreak after it. Thus, if plain
text follows, the line break is executed, but if a list or a display follows, it
is not executed.
Note: The\hfill\penalty-8000causes TEXtoleave vertical mode, setting
the item contents (ie the header) and entering horizontal mode to perform
the \hfill.
\theoremstyle Thehandlingof\theoremstyle,\theorembodyfont,and\theoremskipamounts
is taken from theorem.sty by Frank Mittelbach:
\theorembodyfont
530 \gdef\theoremstyle#1{%
531 \@ifundefined{th@#1}{\@warning
532 {Unknown theoremstyle ‘#1’. Using ‘plain’}%
533 \theorem@style{plain}}%
534 {\theorem@style{#1}}}
535 \newtoks\theorem@style
536 \newtoks\theorem@@style
537 \global\theorem@style{plain}
If \theoremstyle is called, it is checked if the argument is a valid
theoremstyle, and if so, it is stored in the token \theorem@style. It
is initialized to plain.
538 \newtoks\theorembodyfont
539 \global\theorembodyfont{\itshape}
53