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

Lines 782–790 happen only if 〈env〉 is not yet defined or gets redefined:
Line 782: (from latex.ltx) make 〈env〉 use the counter 〈use ctr〉.
Lines 783–789 similar to lines 771–777 of \@nthm.
Lines 790–792 define \mkheader@〈env〉 to set the style parameters of the
header and set the header (by \@thm):
\mkheader@〈env〉==\setparms@〈env〉\@thm{〈env〉}{〈use ctr〉}{〈output name〉}.
(\setparms@〈env〉 is defined when \@newtheorem{〈env〉}is carried out).
Line 793: (from latex.ltx): \end〈env〉 calls \@endtheorem.
\@xnthm \@xnthm is called by \@nthm if the numbering is relative to some structuring
level.
794 \gdef\@xnthm#1#2[#3]{%
795 \ifthm@tempif
796 \expandafter\@ifundefined{c@#1}%
797 {\@definecounter{#1}}{}%
798 \@newctr{#1}[#3]%
799 \expandafter\xdef\csname the#1\endcsname{%
800 \expandafter\noexpand\csname the#3\endcsname \@thmcountersep
801 {\noexpand\csname\the\theoremnumbering\endcsname{#1}}}%
802 \expandafter\gdef\csname mkheader@#1\endcsname
803 {\csname setparms@#1\endcsname
804 \@thm{#1}{#1}{#2}}%
805 \global\@namedef{end#1}{\@endtheorem}\fi}
Arguments:
〈env〉:=#1 is the (internal) environment name to be defined (transmitted
from \@newtheorem).
〈output name〉:=#2 is its keyword to be used in the output,
〈level〉:=#3 is the structuring level relative to which 〈env〉 has to be numbered
(both read from the L ATEX source).
Lines 796–805 happen only if 〈env〉 is not yet defined or gets redefined:
Lines 796, 797: in not yet defined, define 〈env〉- counter (otherwise, 〈env〉 is
redefined).
Line 799: (from latex.ltx): define the counter for 〈env〉 and add 〈level〉 to its
reset-triggers.
Lines 800, 801: define \the〈env〉 to be the command sequence
\the〈level〉\@thmcountersep〈numbering〉{〈env〉} ,
where 〈numbering〉 is the value of \theoremnumbering when \@xnthm
(and thus, \newtheorem{〈env〉}) is called.
Lines 802–804: define \mkheader@〈env〉 to set the style parameters of the
header and set the header (by \@thm):
\mkheader@〈env〉==\setparms@〈env〉\@thm{〈env〉}{〈env〉}{〈output name〉}.
63