mh

git-svn-id: svn://tug.org/texlive/trunk@1090 c570f23f-e606-0410-a88d-b1316a301751

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+%%
+%% This is file `empheq.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% empheq.dtx  (with options: `empheq')
+%% 
+%% It may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2003/12/01 or later.
+%% 
+%% This work has the LPPL maintenance status "maintained".
+%% 
+%% The Current Maintainer of this work is Morten H\o gholm.
+%% 
+%% This work consists of the files empheq.dtx and empheq.ins and the
+%% derived files empheq.sty and ntheorem.fix
+%% 
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{empheq}
+  [2004/10/10 v2.11a
+  Emphasizing equations (MH)
+  ]
+\RequirePackage{mhsetup}[2004/10/10]
+\MHInternalSyntaxOn
+\MH_new_boolean:n {overload_ams}
+\DeclareOption{overload}{
+  \MH_set_boolean_T:n {overload_ams}
+}
+\MH_new_boolean:n {overload_amsII}
+\DeclareOption{overload2}{
+  \MH_set_boolean_T:n {overload_ams}
+  \MH_set_boolean_T:n {overload_amsII}
+}
+\MH_new_boolean:n {good_mult}
+\DeclareOption{oldmultline}{\MH_set_boolean_F:n {good_mult}}
+\DeclareOption{newmultline}{\MH_set_boolean_T:n {good_mult}}
+\DeclareOption{ntheorem}{\AtEndOfPackage{\input{ntheorem.fix}}}
+\DeclareOption*{
+  \PassOptionsToPackage{\CurrentOption}{mathtools}
+}
+\ExecuteOptions{newmultline}
+\ProcessOptions\relax
+\MHInternalSyntaxOff
+\RequirePackage{mathtools}[2004/10/10]
+\MHInternalSyntaxOn
+\AtEndOfPackage{\MHInternalSyntaxOff}
+\newcount\l_EQ_equationtype_int
+\newcount\l_EQ_alignmentmode_int
+\if@fleqn
+  \iftagsleft@
+    \l_EQ_alignmentmode_int=4
+  \else:
+    \l_EQ_alignmentmode_int=\thr@@
+  \fi:
+\else:
+  \iftagsleft@
+    \l_EQ_alignmentmode_int=\tw@
+  \else:
+    \l_EQ_alignmentmode_int=\@ne
+  \fi:
+\fi:
+\newdimen\l_EQ_totalwidth_dim
+\newdimen\l_EQ_displaywidth_dim
+\def\EmphEqdisplaywidth{\l_EQ_displaywidth_dim}
+\newdimen\l_EQ_temp_linewidth_dim
+\newdimen\EmphEqdelimitershortfall
+\newcount\EmphEqdelimiterfactor
+\EmphEqdelimiterfactor950
+\EmphEqdelimitershortfall\p@
+\newdimen\g_EQ_toptag_height_dim
+\newdimen\g_EQ_bottomtag_depth_dim
+\newdimen\g_EQ_toprow_height_dim
+\newdimen\g_EQ_bottomrow_depth_dim
+\newdimen\g_EQ_widesttag_dim
+\def\EmphEqtagwidth{\g_EQ_widesttag_dim}
+\def\EQ_outerbox:{}
+\def\EQ_innerbox:{}
+\def\EQ_left_side:{}
+\def\EQ_right_side:{}
+\newsavebox\EQ_mathdisplay_box
+\def\EmphEqdisplayheight{\ht\EQ_mathdisplay_box}
+\def\EmphEqdisplaydepth{\dp\EQ_mathdisplay_box}
+\newsavebox\EQ_tag_box
+\def\EQ_complete_mathdisplay:{}
+\def\EQ_getbody:n #1{%
+  \def\EQ_complete_mathdisplay:{}\def\EQ_mathbody:{#1}}
+\newenvironment{EmphEqMainEnv}{\collect@body\EQ_getbody:n}{%
+  \if_num:w \l_EQ_equationtype_int=\z@ %ZeroCheckpoint
+    \EQ_upgrade_error:
+  \else:
+    \EQ_post_process:
+    \ignorespacesafterend
+  \fi:}
+\def\EQ_post_process:{%
+  \EQ_initialize:
+  \EQ_begin_equation:
+  \MH_if_boolean:nT {outer_mult}{
+    \setkeys{\MT_options_name:}{
+      firstline-afterskip=0pt,
+      lastline-preskip=0pt,
+      multlined-width=0pt,
+    }
+    \ifodd \l_EQ_alignmentmode_int
+      \setkeys{\MT_options_name:}{multlined-pos=b}
+    \else:
+      \setkeys{\MT_options_name:}{multlined-pos=t}
+    \fi:
+      \g@addto@macro\EQ_complete_mathdisplay:{
+        \begin{MTmultlined}\relax}
+  }
+  \g@addto@macro\EQ_complete_mathdisplay:\EQ_mathbody:
+  \MH_if_boolean:nT {outer_mult}{
+    \g@addto@macro\EQ_complete_mathdisplay:{\end{MTmultlined}}
+  }
+  \EQ_end_equation:
+  \edef\EQ_hyperref_link_fint{\number\Hy@linkcounter}
+  \savecounters@
+  \EQ_typeset_tags:
+  \edef\l_EQ_equation_fint{\number\c@equation}
+  \restorecounters@
+  \Hy@linkcounter=\EQ_hyperref_link_fint
+  \settowidth\l_EQ_totalwidth_dim{%
+    $\EQ_left_side:\EQ_innerbox:{}\EQ_right_side:$}%
+  \MH_if_boolean:nTF {outer_mult}
+    { \def\EQ_next:{_mult} }
+    { \def\EQ_next:{} }
+  \@nameuse{EQ_modify_linewidth_
+            \romannumeral\l_EQ_equationtype_int\EQ_next: :}%
+  \EQ_typeset_display:
+  \@nameuse{find_displaywidth_
+           \romannumeral\l_EQ_equationtype_int\EQ_next: :}
+  \MH_addtolength:dn
+    \l_EQ_totalwidth_dim{\l_EQ_displaywidth_dim}
+  \savebox\EQ_mathdisplay_box[\l_EQ_totalwidth_dim][c]{%
+    $\EQ_left_side:
+    \EQ_innerbox:{%
+      \if_case:w \l_EQ_alignmentmode_int\or:
+        \makebox[\l_EQ_displaywidth_dim][c]
+          {\usebox{\EQ_mathdisplay_box}}%
+      \or:
+        \makebox[\l_EQ_displaywidth_dim][c]
+          {\usebox{\EQ_mathdisplay_box}}%
+      \or:
+        \makebox[\l_EQ_displaywidth_dim][l]{%
+          \if_num:w \l_EQ_equationtype_int=5 \else:
+            \if_num:w \l_EQ_equationtype_int=6 \else:
+              \kern-\@mathmargin
+            \fi:
+          \fi:
+          \usebox{\EQ_mathdisplay_box}}%
+      \or:
+        \makebox[\l_EQ_displaywidth_dim][l]{%
+          \if_num:w \l_EQ_equationtype_int=5 \else:
+            \if_num:w \l_EQ_equationtype_int=6 \else:
+              \kern-\@mathmargin
+            \fi:
+          \fi:
+          \usebox{\EQ_mathdisplay_box}}%
+      \fi:}%
+    \EQ_right_side:$}%
+  \begin{AmSequation*}
+  \@nameuse{EQ_place_display_
+           \romannumeral\l_EQ_equationtype_int\EQ_next: :}
+  \if_dim:w \g_EQ_widesttag_dim>\z@
+  \MH_set_boolean_T:n {show_manual_tags}
+    \if_case:w \l_EQ_alignmentmode_int
+    \or: \EQ_place_tag:N r %#1
+    \or: \EQ_place_tag:N l %#2
+    \or: \EQ_place_tag:N r %#3
+    \or: \EQ_place_tag:N l %#4
+    \fi:
+  \fi:
+  \end{AmSequation*}
+  \global\c@equation=\l_EQ_equation_fint\relax
+}
+\def\EQ_initialize:{%
+  \m@th
+  \MH_let:NwN\SetTagPlusEndMark\EQ_tag_plus_endmark:
+  \MH_let:NwN\SetOnlyEndMark\EQ_only_endmark:
+  \l_EQ_temp_linewidth_dim\linewidth
+  \g_EQ_toprow_height_dim\z@
+  \g_EQ_bottomrow_depth_dim\z@
+  \g_EQ_toptag_height_dim\z@
+  \g_EQ_bottomtag_depth_dim\z@
+  \g_EQ_widesttag_dim\z@
+  \xdef\g_EQ_latest_nonzerodepth_row_fint{\z@}
+  \edef\EQ_restore_tex_delimiter:{%
+    \delimiterfactor\the\delimiterfactor
+    \delimitershortfall\the\delimitershortfall\relax}%
+  \g@addto@macro\EQ_complete_mathdisplay:
+                \EQ_restore_tex_delimiter:
+  \delimitershortfall\EmphEqdelimitershortfall
+  \delimiterfactor\EmphEqdelimiterfactor
+  \MH_let:NwN\intertext@\EQ_intertext:
+  \EQ_displaybreak:}
+\def\EQ_intertext:{%
+  \def\intertext##1{\PackageError{empheq}{%
+    You~cannot~use~\string\intertext\space inside~the~`empheq'
+    \MessageBreak
+    environment,~as~`empheq'~creates~an~unbreakable~box}\@eha}}
+\def\EQ_displaybreak:{%
+  \def\dspbrk@[##1]{\PackageWarning{empheq}{%
+    You~cannot~use~\string\displaybreak\space inside~the~`empheq'%
+    \MessageBreak
+    environment,~as~`empheq'~creates~an~unbreakable~box.}}}
+\def\EQ_new_equationtype:nnn #1#2#3{%
+  \define@key{#1}{#2}[true]{%
+    \l_EQ_equationtype_int=#3\relax
+    \def\EQ_begin_equation:
+      {\g@addto@macro{\EQ_complete_mathdisplay:}{\begin{#2}}}%
+    \def\EQ_end_equation:
+      {\g@addto@macro{\EQ_complete_mathdisplay:}{\end{#2}}}}}
+\def\EQ_new_equationtype_arg:nnn #1#2#3{%
+  \define@key{#1}{#2}{%
+    \l_EQ_equationtype_int=#3\relax
+    \def\EQ_begin_equation:
+      {\g@addto@macro{\EQ_complete_mathdisplay:}{\begin{#2}{##1}}}%
+    \def\EQ_end_equation:
+      {\g@addto@macro{\EQ_complete_mathdisplay:}{\end{#2}}}}}
+\def\EQ_typeset_tags:{%
+  \sbox\EQ_tag_box{%
+    \parbox{.5\maxdimen}{%
+      \hbadness\@M
+      \EQ_prevent_vertical_space:
+      \EQ_typeset_tags_hook:
+      \MH_let:NwN\set@gather@field\EQ_set_gather_field:
+      \MH_let:NwN\set@field\EQ_set_align_field:
+      \MH_set_boolean_T:n {continue_measuring}
+      \global\g_EQ_temprow_int\m@ne
+      \MH_let:NwN \EQ_saved_maketag:n \maketag@@@
+      \def\maketag@@@##1{
+        \EQ_maketag:Nn \EQ_saved_maketag:n {##1}}
+      \EQ_complete_mathdisplay:}}}
+\def\EQ_predisplay_adjustment:{%
+  \if_dim:w \g_EQ_toprow_height_dim<\baselineskip
+    \vskip\g_EQ_toprow_height_dim
+    \vskip-\baselineskip
+  \else:
+    \vskip-\normallineskip
+  \fi:
+  \if_dim:w \g_EQ_toptag_height_dim>\g_EQ_toprow_height_dim
+    \if_dim:w \g_EQ_toptag_height_dim>\baselineskip
+      \vskip-\g_EQ_toptag_height_dim
+      \vskip\baselineskip
+      \vskip-\normallineskip
+    \fi:
+  \fi:}
+\def\EQ_postdisplay_adjustment:{%
+  \if_dim:w \g_EQ_bottomrow_depth_dim<\dp\strutbox
+    \vskip\g_EQ_bottomrow_depth_dim
+    \vskip-\dp\strutbox
+  \fi:
+  \if_dim:w \g_EQ_bottomtag_depth_dim>\g_EQ_bottomrow_depth_dim
+    \if_dim:w \g_EQ_bottomtag_depth_dim>\dp\strutbox
+      \vskip-\g_EQ_bottomtag_depth_dim
+      \vskip\dp\strutbox
+    \fi:
+  \fi:}
+\def\EQ_typeset_display:{%
+  \sbox\EQ_mathdisplay_box{%
+    \parbox{\l_EQ_temp_linewidth_dim}{%
+      \EQ_predisplay_adjustment:
+      \EQ_prevent_vertical_space:
+      \EQ_typeset_display_hook:
+      \def\maketag@@@##1{\EQ_maketag:Nn \vphantom{##1}}%
+      \EQ_complete_mathdisplay:
+      \EQ_postdisplay_adjustment:}}}
+\def\EQ_prevent_vertical_space:{%
+  \nointerlineskip
+  \abovedisplayskip\z@  \belowdisplayskip\z@\relax}
+\def\EQ_maketag:Nn #1#2{%
+  \setboxz@h{#2}%
+  \if_num:w \row@=\@ne
+    \global \g_EQ_toptag_height_dim = \ht\z@
+  \fi:
+  \global \g_EQ_bottomtag_depth_dim=\dp\z@
+  \xdef\g_EQ_latest_nonzerodepth_row_fint{\number\row@}
+  \@tempdima=\wd\z@
+  \if_dim:w \@tempdima > \g_EQ_widesttag_dim
+    \global \g_EQ_widesttag_dim = \@tempdima
+  \fi:
+  #1{#2}%
+}
+\def\EQ_set_gather_field:{%
+  \iftagsleft@
+    \global\lineht@\ht\z@
+  \else:
+    \global\lineht@\dp\z@
+  \fi:
+  \kern\eqnshift@
+  %\boxz@ % Original amsmath version
+  \EQ_measure_gather:
+  \phantom{\boxz@}%
+  \hfil}
+\def\EQ_measure_gather:{%
+  \if_num:w \row@=\@ne
+    \g_EQ_toprow_height_dim=\ht\z@
+  \fi:
+  \g_EQ_bottomrow_depth_dim=\dp\z@
+  \global\g_EQ_toprow_height_dim\g_EQ_toprow_height_dim
+  \global\g_EQ_bottomrow_depth_dim\g_EQ_bottomrow_depth_dim}
+\def\EQ_set_align_field:{%
+  \column@plus
+  \iftagsleft@
+    \if_dim:w \ht\z@>\lineht@
+      \global\lineht@\ht\z@
+    \fi:
+  \else:
+    \if_dim:w \dp\z@>\lineht@
+      \global\lineht@\dp\z@
+    \fi:
+  \fi:
+  %\boxz@ % Original amsmath version
+  \MH_if_boolean:nT {continue_measuring}{ \EQ_measure_align: }
+  \phantom{\boxz@}}
+\newcount\g_EQ_temprow_int
+\MH_new_boolean:n {still_in_samerow}
+\MH_new_boolean:n {continue_measuring}
+\def\EQ_measure_align:{%
+  \if_num:w \g_EQ_temprow_int=\row@
+    \MH_set_boolean_T:n {still_in_samerow}
+  \else:
+    \if_num:w \g_EQ_temprow_int>\row@
+      \global\MH_set_boolean_F:n {continue_measuring}
+    \fi:
+    \MH_set_boolean_F:n {still_in_samerow}
+    \global\@tempdimc=\@tempdimb
+    \global\@tempdimb=\g_EQ_bottomrow_depth_dim
+  \fi:
+  \MH_if_boolean:nTF {continue_measuring}{
+    \global\g_EQ_temprow_int=\row@
+    \@tempcnta=\row@
+    \if_num:w \@tempcnta=\z@
+      \@tempdima=\g_EQ_toprow_height_dim
+      \g_EQ_toprow_height_dim=\ht\z@\relax
+      \if_dim:w \g_EQ_toprow_height_dim<\@tempdima
+        \g_EQ_toprow_height_dim\@tempdima
+      \fi:
+    \fi:
+    \MH_if_boolean:nTF {still_in_samerow}{
+      \@tempdima=\g_EQ_bottomrow_depth_dim
+      \g_EQ_bottomrow_depth_dim=\dp\z@\relax
+      \if_dim:w \g_EQ_bottomrow_depth_dim<\@tempdima
+        \g_EQ_bottomrow_depth_dim\@tempdima
+      \fi:
+    }{
+      \g_EQ_bottomrow_depth_dim\dp\z@\relax
+    }
+  }{
+    \global\g_EQ_bottomrow_depth_dim=\@tempdimc
+  }
+  \global\g_EQ_toprow_height_dim\g_EQ_toprow_height_dim
+  \global\g_EQ_bottomrow_depth_dim\g_EQ_bottomrow_depth_dim}
+\def\EQ_place_tag:N #1{%
+  \tag*{\makebox[\g_EQ_widesttag_dim][#1]{%
+    \EQ_vertical_tag_adjustment:n {\usebox{\EQ_tag_box}}}}}
+\def\EQ_vertical_tag_adjustment:n #1{{%
+  \@tempdima\z@\@tempdimb\z@
+  \@tempdimc=\dp\strutbox
+  \if_dim:w \g_EQ_toprow_height_dim<\baselineskip
+    \MH_setlength:dn
+      \@tempdima{\g_EQ_toprow_height_dim-\baselineskip}
+  \else:
+    \MH_setlength:dn \@tempdima{-\normallineskip}
+  \fi:
+  \if_dim:w \g_EQ_toptag_height_dim>\g_EQ_toprow_height_dim
+    \if_dim:w \g_EQ_toptag_height_dim>\baselineskip
+      \MH_addtolength:dn \@tempdima
+        {-\g_EQ_toptag_height_dim+\baselineskip-\normallineskip}
+    \fi:
+  \fi:
+  \if_dim:w \g_EQ_bottomrow_depth_dim<\@tempdimc
+    \MH_setlength:dn \@tempdimb
+      {\g_EQ_bottomrow_depth_dim-\@tempdimc}
+  \fi:
+  \if_dim:w \g_EQ_bottomtag_depth_dim>\g_EQ_bottomrow_depth_dim
+    \if_dim:w \g_EQ_bottomtag_depth_dim<\@tempdimc
+    \else:
+      \MH_addtolength:dn \@tempdimb
+        {-\g_EQ_bottomtag_depth_dim+\@tempdimc}
+    \fi:
+  \fi:
+  \raisebox{-0.5\@tempdima+0.5\@tempdimb}{#1}}}%
+\def\EQ_use_mathdisplay:{%
+  \EQ_outerbox:{\usebox{\EQ_mathdisplay_box}}}
+\def\EQ_options_name:{EmphEqOpt}
+\MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{equation}{gather}
+  {\EQ_disable_linebreak:}
+\MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{equation*}{gather*}
+  {\EQ_disable_linebreak:}
+\def\EQ_disable_linebreak:{%
+  \MH_let:NwN \EQ_saved_Let: \Let@
+  \def\Let@{\def\\{%
+    \PackageError{empheq}{You~ cannot~ use~ \string\\~ in~ equation!}
+      {\@eha}}
+    \MH_let:NwN \Let@ \EQ_saved_Let:
+  }%
+}
+\EQ_new_equationtype:nnn {EmphEqEnv}{align}{1}
+\EQ_new_equationtype:nnn {EmphEqEnv}{align*}{2}
+\def\EQ_modify_linewidth_i:{%
+  \if_num:w \maxfields@=\tw@
+  \else:
+    \setlength{\l_EQ_temp_linewidth_dim}{%
+      \linewidth-\l_EQ_totalwidth_dim-\widthof{\EQ_outerbox:{}}}%
+  \fi:}
+\def\EQ_modify_linewidth_ii:{\EQ_modify_linewidth_i:}
+\def\find_displaywidth_i:{%
+  \MH_setlength:dn \l_EQ_displaywidth_dim
+    {\l_EQ_temp_linewidth_dim-\alignsep@}
+  \if_case:w \l_EQ_alignmentmode_int
+  \or: % #1:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\alignsep@}%
+  \or: % #2:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\alignsep@}%
+  \or: % #3:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\@mathmargin}%
+  \or: % #4:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\@mathmargin}%
+  \fi:}
+\def\find_displaywidth_ii:{\find_displaywidth_i:}
+\def\EQ_place_display_i: {\EQ_use_mathdisplay:}
+\def\EQ_place_display_ii:{\EQ_place_display_i:}
+\EQ_new_equationtype:nnn {EmphEqEnv}{gather}{3}
+\EQ_new_equationtype:nnn {EmphEqEnv}{gather*}{4}
+\def\EQ_modify_linewidth_iii:{}
+\def\EQ_modify_linewidth_iv:{\EQ_modify_linewidth_iii:}
+\def\find_displaywidth_iii:{%
+  \MH_setlength:dn \l_EQ_displaywidth_dim{\totwidth@}%
+  \if_case:w \l_EQ_alignmentmode_int \or: \or: % #1 & #2:
+  \or: % #3:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\@mathmargin}%
+  \or: % #4:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\@mathmargin}%
+  \fi:}
+\def\find_displaywidth_iv:{\find_displaywidth_iii:}
+\def\EQ_place_display_iii:{\EQ_use_mathdisplay:}
+\def\EQ_place_display_iv: {\EQ_place_display_iii:}
+\MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{multline}
+  {flalign}{\MH_set_boolean_T:n {multline}}
+\MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{multline*}
+  {flalign*}{\MH_set_boolean_T:n {multline}}
+\MH_new_boolean:n {multline}
+\def\EQ_multline_modify_linewidth_tag:{%
+  \if_case:w \l_EQ_alignmentmode_int
+  \or: % #1:
+    \MH_addtolength:dn \l_EQ_temp_linewidth_dim{%
+      -\g_EQ_widesttag_dim-\multlinetaggap-\multlinegap}%
+  \or:
+    \MH_addtolength:dn \l_EQ_temp_linewidth_dim{%
+      -\g_EQ_widesttag_dim-\multlinetaggap-\multlinegap}%
+  \or:
+    \MH_addtolength:dn \l_EQ_temp_linewidth_dim{%
+      -\@mathmargin-\g_EQ_widesttag_dim-\multlinetaggap}%
+  \or:
+    \MH_addtolength:dn
+      \l_EQ_temp_linewidth_dim{-\@mathmargin-\multlinegap}%
+  \fi:
+}
+\def\EQ_multline_modify_linewidth_notag:{%
+  \if_case:w \l_EQ_alignmentmode_int\or:
+    \MH_addtolength:dn \l_EQ_temp_linewidth_dim{-2\multlinegap}
+  \or:
+    \MH_addtolength:dn \l_EQ_temp_linewidth_dim{-2\multlinegap}
+  \or:
+    \MH_addtolength:dn
+      \l_EQ_temp_linewidth_dim{-\@mathmargin-\multlinegap}%
+  \or:
+    \MH_addtolength:dn
+      \l_EQ_temp_linewidth_dim{-\@mathmargin-\multlinegap}%
+  \fi:
+}
+\MH_let:NwN \MTmultlined \multlined
+\MH_let:NwN \endMTmultlined \endmultlined
+\MH_if_boolean:nTF {good_mult}{
+\MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{multline}{gather}
+  {\MH_set_boolean_T:n {outer_mult}}
+\MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{multline*}{gather*}
+  {\MH_set_boolean_T:n {outer_mult}}
+\def\EQ_modify_linewidth_iii_mult:{
+  \setlength{\l_EQ_temp_linewidth_dim}{%
+    \linewidth-\widthof{\EQ_outerbox:{}}}%
+  \if_dim:w \g_EQ_widesttag_dim>\z@
+    \EQ_multline_modify_linewidth_tag:
+  \else:
+    \EQ_multline_modify_linewidth_notag:
+  \fi:
+  \MH_setlength:dn \l_MT_multwidth_dim{\l_EQ_temp_linewidth_dim}
+}
+\def\EQ_modify_linewidth_iv_mult:{\EQ_modify_linewidth_iii_mult:}
+\def\find_displaywidth_iii_mult:{%
+  \MH_setlength:dn \l_EQ_displaywidth_dim{\totwidth@}%
+  \if_case:w \l_EQ_alignmentmode_int \or: \or: % #1 & #2:
+  \or: % #3:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\@mathmargin}%
+  \or: % #4:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\@mathmargin}%
+  \fi:}
+\def\find_displaywidth_iv_mult:{\find_displaywidth_iii_mult:}
+\def\EQ_place_display_iii_mult:{
+  \if_case:w \l_EQ_alignmentmode_int
+  \or: % #1:
+    \if_dim:w \g_EQ_widesttag_dim>\z@
+      \abovedisplayshortskip=\abovedisplayskip
+      \rlap{
+        \kern-.5\linewidth
+        \kern\multlinegap
+        \EQ_use_mathdisplay:
+      }
+    \else:
+      \EQ_use_mathdisplay:
+    \fi:
+  \or: % #2:
+    \if_dim:w \g_EQ_widesttag_dim>\z@
+      \llap{
+        \EQ_use_mathdisplay:
+        \kern-.5\linewidth
+        \kern\multlinegap
+      }%
+    \else:
+      \EQ_use_mathdisplay:
+    \fi:
+  \or: % #3:
+    \EQ_use_mathdisplay:
+  \or: % #4:
+    \EQ_use_mathdisplay:
+  \fi:
+}
+\def\EQ_place_display_iv_mult: {\EQ_place_display_iii_mult:}
+}{
+\def\EQ_generic_multline:nnnnn #1#2#3#4#5{%
+  \hskip1sp#2#3{{}#5}#4%
+  \if:w *#1\relax\else:\notag\fi:}
+\def\multleft{\@ifstar{%
+  \MH_if_boolean:nTF {multlined}{
+    \def\EQ_next:{\EQ_multlined_left:n}
+  }{
+    \def\EQ_next:{
+      \EQ_generic_multline:nnnnn {*}{}{\mathrlap}{&&&&&}}
+  }
+  \EQ_next:}{%
+  \MH_if_boolean:nTF {multlined}{
+    \def\EQ_next:{\EQ_multlined_left:n}%
+  }{
+    \def\EQ_next:{
+      \EQ_generic_multline:nnnnn {}{}{\mathrlap}{&&&&&}}
+  }
+  \EQ_next:}}%
+\def\multcenter{\@ifstar{%
+  \MH_if_boolean:nTF {multlined}{
+    \def\EQ_next:{\EQ_multlined_center:n}%
+  }{
+    \def\EQ_next:{
+      \EQ_generic_multline:nnnnn {*}{&&}{\mathclap}{&&&}}
+  }
+  \EQ_next:}{%
+  \MH_if_boolean:nTF {multlined}{
+    \def\EQ_next:{\EQ_multlined_center:n }%
+  }{
+    \def\EQ_next:{
+      \EQ_generic_multline:nnnnn {}{&&}{\mathclap}{&&&}}
+  }
+  \EQ_next:}}%
+\def\multright{\@ifstar{%
+  \MH_if_boolean:nTF {multlined}{
+    \def\EQ_next:{\EQ_multlined_right:n }%
+  }{
+    \def\EQ_next:{
+      \EQ_generic_multline:nnnnn {*}{&&&&&}{\mathllap}{}}
+  }
+  \EQ_next:}{%
+  \MH_if_boolean:nTF {multlined}{
+    \def\EQ_next:{\EQ_multlined_right:n }%
+  }{
+    \def\EQ_next:{
+      \EQ_generic_multline:nnnnn {}{&&&&&}{\mathllap}{}}
+  }
+  \EQ_next:}}
+\def\multfirst{%
+  \MH_if_boolean:nTF {multlined}{
+     \def\EQ_next:{\EQ_multlined_left:n }%
+  }{
+    \if_case:w \l_EQ_alignmentmode_int
+    \or: % #1:
+      \def\EQ_next:{\multleft}%
+    \or: % #2:
+      \def\EQ_next:{\multleft*}%
+    \or: % #3:
+      \def\EQ_next:{\multleft}%
+    \or: % #4:
+      \def\EQ_next:{\multleft*}%
+    \fi:
+  }
+  \EQ_next:}
+\def\multmiddle{%
+  \def\EQ_next:{%
+    \MH_if_boolean:nTF {multlined}{
+      \expandafter\EQ_multlined_center:n
+    }{
+      \expandafter\multcenter
+    }
+  }%
+  \@ifstar{\EQ_next:}{\EQ_next:}}
+\def\multlast{%
+  \MH_if_boolean:nTF {multlined}{
+     \def\EQ_next:{\EQ_multlined_right:n }%
+  }{
+    \if_case:w \l_EQ_alignmentmode_int
+    \or: % #1:
+      \def\EQ_next:{\multright*}%
+    \or: % #2:
+      \def\EQ_next:{\multright}%
+    \or: % #3:
+      \def\EQ_next:{\multright*}%
+    \or: % #4:
+      \def\EQ_next:{\multright}%
+    \fi:
+  }
+  \EQ_next:}
+\MH_new_boolean:n {multlined}
+\newdimen\multlinedwidth
+\MH_setlength:dn \multlinedwidth{.7\linewidth}
+\renewenvironment{multlined}%
+  {\MH_nospace_ifnextchar:Nnn [  {\EQ_multlined_I:w}
+                                 {\EQ_multlined_I:w[c]}
+  }
+  { \endaligned }
+\def\EQ_multlined_I:w[#1]{%
+  \MH_nospace_ifnextchar:Nnn[  {\EQ_multlined_II:w[#1]}
+                               {\EQ_multlined_II:w[#1][\multlinedwidth]}}
+\def\EQ_multlined_II:w[#1][#2]{%
+  \MH_set_boolean_T:n {multlined}
+  \MH_let:NwN \Let@\MT_saved_Let:
+  \if:w t#1\relax \EQ_multlined_III:nn {#1}{#2}%
+  \else:
+    \if:w b#1\relax \EQ_multlined_III:nn {#1}{#2}%
+    \else:
+      \if:w c#1\relax \EQ_multlined_III:nn {#1}{#2}%
+      \else:
+        \EQ_multlined_III:nn {#2}{#1}%
+      \fi:
+    \fi:
+  \fi:
+  \mkern-\thinmuskip
+  \EQ_next:}
+\def\EQ_multlined_III:nn #1#2{%
+  \def\EQ_next:{\setlength\multlinedwidth{#2}%
+                          \start@aligned{#1}{\thr@@}}}
+\def\EQ_multlined_left:n #1{%
+  \mathrlap{#1}&\hskip.5\multlinedwidth&&\hskip.5\multlinedwidth&&}
+\def\EQ_multlined_center:n #1{%
+  &\hskip.5\multlinedwidth&&\mathclap{#1}\hskip.5\multlinedwidth&&}
+\def\EQ_multlined_right:n #1{%
+  &\hskip.5\multlinedwidth&&\hskip.5\multlinedwidth&&\mathllap{#1}}
+}
+\EQ_new_equationtype:nnn {EmphEqEnv}{flalign}{5}
+\EQ_new_equationtype:nnn {EmphEqEnv}{flalign*}{6}
+\def\EQ_modify_linewidth_v:{%
+  \setlength{\l_EQ_temp_linewidth_dim}{%
+    \linewidth-\l_EQ_totalwidth_dim-\widthof{\EQ_outerbox:{}}}%
+  \if_dim:w \g_EQ_widesttag_dim>\z@
+    \MH_if_boolean:nTF {multline}{
+      \EQ_multline_modify_linewidth_tag:
+    }{
+      \if_case:w \l_EQ_alignmentmode_int
+      \or: % #1:
+        \MH_addtolength:dn  \l_EQ_temp_linewidth_dim
+          {-\g_EQ_widesttag_dim-\mintagsep}
+      \or: % #2:
+        \MH_addtolength:dn \l_EQ_temp_linewidth_dim
+          {-\g_EQ_widesttag_dim-\mintagsep}%
+      \or: % #3:
+        \MH_addtolength:dn \l_EQ_temp_linewidth_dim
+          {-\g_EQ_widesttag_dim-\mintagsep}
+      \or: % #4:
+        \MH_addtolength:dn \l_EQ_temp_linewidth_dim
+          {-\@mathmargin}
+      \fi:
+    }
+  \else:
+    \MH_if_boolean:nT {multline}{
+      \EQ_multline_modify_linewidth_notag:
+    }
+  \fi:}
+\def\EQ_modify_linewidth_vi:{\EQ_modify_linewidth_v:}
+\def\find_displaywidth_v:{%
+  \MH_setlength:dn
+    \l_EQ_displaywidth_dim{\l_EQ_temp_linewidth_dim}}
+\def\find_displaywidth_vi:{\find_displaywidth_v:}
+\def\EQ_place_display_v:{%
+  \if_case:w \l_EQ_alignmentmode_int
+  \or: % #1:
+    \if_dim:w \g_EQ_widesttag_dim>\z@
+      \MH_if_boolean:nTF {multline}{
+        \rlap{\kern\multlinegap  \kern-.5\linewidth
+          \EQ_use_mathdisplay:
+          \kern-\mintagsep  \kern\multlinetaggap}%
+      }{
+        \rlap{\kern-.5\linewidth\EQ_use_mathdisplay:}%
+      }
+    \else:
+      \EQ_use_mathdisplay:
+    \fi:
+  \or: % #2:
+    \if_dim:w \g_EQ_widesttag_dim>\z@
+      \MH_if_boolean:nTF {multline}{
+        \llap{\kern-\mintagsep \kern\multlinetaggap
+          \EQ_use_mathdisplay:
+          \kern\multlinegap  \kern-.5\linewidth}%
+      }{
+        \llap{\EQ_use_mathdisplay:\kern-.5\linewidth}%
+      }
+    \else:
+      \EQ_use_mathdisplay:
+    \fi:
+  \or: % #3:
+    \MH_if_boolean:nF {multline}{ \kern-\multlinetaggap }
+    \EQ_use_mathdisplay:
+  \or: % #4:
+    \if_dim:w \g_EQ_widesttag_dim>\z@
+    \else:
+      \MH_if_boolean:nF {multline}{ \kern-\@mathmargin }
+    \fi:
+    \EQ_use_mathdisplay:
+  \fi:
+  \MH_set_boolean_F:n {multline}}
+\def\EQ_place_display_vi:{\EQ_place_display_v:}
+\EQ_new_equationtype_arg:nnn {EmphEqEnv}{alignat}{7}
+\EQ_new_equationtype_arg:nnn {EmphEqEnv}{alignat*}{8}
+\def\EQ_modify_linewidth_vii:{}
+\def\EQ_modify_linewidth_viii:{\EQ_modify_linewidth_vii:}
+\def\find_displaywidth_vii:{%
+  \MH_setlength:dn \l_EQ_displaywidth_dim{\totwidth@}%
+  \if_case:w \l_EQ_alignmentmode_int
+  \or: % #1:
+  \or: % #2:
+  \or: % #3:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\eqnshift@}%
+  \or: % #4:
+    \MH_addtolength:dn \l_EQ_displaywidth_dim{-\@mathmargin}%
+  \fi:}
+\def\find_displaywidth_viii:{\find_displaywidth_vii:}
+\def\EQ_place_display_vii:{\EQ_use_mathdisplay:}
+\def\EQ_place_display_viii:{\EQ_place_display_vii:}
+\define@key{\EQ_options_name:}{box}{\def\EQ_outerbox:{#1}}
+\MH_keyval_alias:nnn {\EQ_options_name:}{outerbox}{box}
+\def\EQ_marginbox:nn #1#2{%
+  \settowidth{\@tempdima}{#2}%
+  \makebox[\z@]{\hspace{\@tempdima}#1{#2}}}
+\define@key{\EQ_options_name:}{marginbox}{%
+  \def\EQ_outerbox:{\EQ_marginbox:nn {#1}}}
+\define@key{\EQ_options_name:}{innerbox}{\def\EQ_innerbox:{#1}}
+\define@key{\EQ_options_name:}{left}{\def\EQ_left_side:{#1}}
+\define@key{\EQ_options_name:}{right}{\def\EQ_right_side:{#1}}
+\newcommand*\empheqset[1]{\setkeys{\EQ_options_name:}{#1}}
+\def\EQ_upgrade_error:{%
+  \PackageError{empheq}
+    {You~ are~ using~ the~ old~ syntax!\MessageBreak
+    The~ `empheq'~ environment~ takes~ a~ mandatory~
+    argument~ now.\MessageBreak
+    You~ need~ to~ exit~ and~ change~ your~ source~ file.}
+    {It~ won't~ work,~ trust me.~ Press~ `X'~ now.}}
+\define@key{\EQ_options_name:}{boxtype}{\EQ_upgrade_error:}
+\define@key{\EQ_options_name:}{Left}{\EQ_upgrade_error:}
+\define@key{\EQ_options_name:}{Right}{\EQ_upgrade_error:}
+\newenvironment{empheq}[2][]{%
+  \setkeys{EmphEqEnv}{#2}\setkeys{\EQ_options_name:}{#1}%
+  \EmphEqMainEnv}{\endEmphEqMainEnv}
+\newcommand*\DeclareLeftDelimiter[2][]{%
+  \EQ_declare_left_delimiter:nnnn {#1}{#2}{}{}%
+  \EQ_declare_left_delimiter:nnnn {#1}{#2}{big}{\EQ_innerbox:}}
+\def\EQ_declare_left_delimiter:nnnn #1#2#3#4{%
+  \@namedef{empheq#3\expandafter\@gobble\string#2}{%
+    \left#2%
+    \mkern-\thinmuskip
+    \vphantom{#4{\parbox{.5\maxdimen}{%
+      \EQ_predisplay_adjustment:
+      \EQ_prevent_vertical_space:
+      \usebox{\EQ_tag_box}%
+      \EQ_postdisplay_adjustment:}}}%
+    \right.%
+    \kern-\nulldelimiterspace #1}}
+\newcommand*\DeclareRightDelimiter[2][]{%
+  \EQ_declare_right_delimiter:nnnn {#1}{#2}{}{}%
+  \EQ_declare_right_delimiter:nnnn {#1}{#2}{big}{\EQ_innerbox:}}
+\def\EQ_declare_right_delimiter:nnnn #1#2#3#4{%
+  \@namedef{empheq#3\expandafter\@gobble\string#2}{%
+    \kern-\nulldelimiterspace
+    #1%
+    \left.%
+    \vphantom{#4{\parbox{.5\maxdimen}{%
+      \EQ_predisplay_adjustment:
+      \EQ_prevent_vertical_space:
+      \usebox{\EQ_tag_box}%
+      \EQ_postdisplay_adjustment:}}}%
+    \mkern-\thinmuskip
+    \right#2}}
+\DeclareLeftDelimiter{\lbrace}
+\DeclareRightDelimiter{\rbrace}
+\DeclareLeftDelimiter{\lbrack}
+\DeclareRightDelimiter{\rbrack}
+\DeclareLeftDelimiter{\langle}
+\DeclareRightDelimiter{\rangle}
+\DeclareLeftDelimiter{\lvert}
+\DeclareRightDelimiter{\rvert}
+\DeclareLeftDelimiter{\lVert}
+\DeclareRightDelimiter{\rVert}
+\DeclareLeftDelimiter{\lfloor}
+\DeclareRightDelimiter{\rfloor}
+\DeclareLeftDelimiter{\lceil}
+\DeclareRightDelimiter{\rceil}
+\DeclareLeftDelimiter{\lparen}
+\DeclareRightDelimiter{\rparen}
+\def\EQ_typeset_tags_hook:{}
+\def\EQ_typeset_display_hook:{}
+\g@addto@macro\EQ_typeset_display_hook:{
+  \def\SK@@label#1>#2\SK@{}
+}
+\@namedef{SK@AmSequation}  {\SK@equationtrue}
+\@namedef{SK@AmSequation*} {\SK@equationtrue}
+\@namedef{SK@AmSalign}     {\SK@equationtrue}
+\@namedef{SK@AmSalign*}    {\SK@equationtrue}
+\@namedef{SK@AmSalignat}   {\SK@equationtrue}
+\@namedef{SK@AmSalignat*}  {\SK@equationtrue}
+\@namedef{SK@AmSgather}    {\SK@equationtrue}
+\@namedef{SK@AmSgather*}   {\SK@equationtrue}
+\@namedef{SK@AmSmultline}  {\SK@equationtrue}
+\@namedef{SK@AmSmultline*} {\SK@equationtrue}
+\@namedef{SK@AmSflalign}   {\SK@equationtrue}
+\@namedef{SK@AmSflalign*}  {\SK@equationtrue}
+\AtBeginDocument{
+  \@ifundefined{Hy@linkcounter}{\newcount\Hy@linkcounter}{}
+}
+\g@addto@macro\EQ_typeset_display_hook:{
+  \MH_let:NwN \hyper@refstepcounter\@gobble
+}
+\g@addto@macro\EQ_typeset_tags_hook:{
+  \MH_let:NwN\TagsPlusEndmarks\relax
+  \MH_let:NwN\RestoreTags\relax
+}
+\g@addto@macro\EQ_typeset_display_hook:{
+  \MH_let:NwN\TagsPlusEndmarks\relax
+  \MH_let:NwN\RestoreTags\relax
+}
+\g@addto@macro\EQ_typeset_display_hook:{
+  \MH_let:NwN\ltx@label\MT_gobblelabel:w
+  \MH_let:NwN \GenericError \@gobblefour
+}
+\AtBeginDocument{%
+  \@ifpackageloaded{fancybox}{%
+    \@ifpackageloaded{color}{\definecolor{shadowcolor}{rgb}{0,0,0}}%
+    {\newcommand*\textcolor[2]{\normalcolor{#2}}}%
+    \MH_new_boolean:n {shadowbox_star}
+    \renewcommand*\shadowbox{%
+      \@ifstar{\MH_set_boolean_T:n {shadowbox_star}
+               \VerbBox\EQ_shadowbox:n}
+              {\MH_set_boolean_F:n {shadowbox_star}
+               \VerbBox\EQ_shadowbox:n}}
+    \def\EQ_shadowbox:n #1{%
+      \sbox{\z@}{\fbox{#1}}%
+      \MH_if_boolean:nTF {shadowbox_star}{
+        \MH_setlength:dn \@tempdima{\z@}%
+      }{
+        \MH_setlength:dn \@tempdima{\dp\z@+\shadowsize}%
+      }
+      \raisebox{\@tempdima}{%
+        \makebox[\z@][l]{%
+          \kern\shadowsize \textcolor{shadowcolor}{%
+            \rule[-\dp\z@-\shadowsize]{\wd\z@}{\shadowsize}}%
+        }%
+        \usebox\z@\textcolor{shadowcolor}{%
+          \rule[-\dp\z@-\shadowsize]{\shadowsize}{\ht\z@+\dp\z@}}}}%
+  }{}%
+}
+\def\EQ_overload_ams_begin:n #1{%
+  \MH_let:cc {AmS#1}{#1}%
+  \MH_let:cc {AmS#1*}{#1*}
+}
+\def\EQ_overload_ams_end:n #1{%
+  \MH_let:cc {endAmS#1}{endAmSalign}
+}
+\AtBeginDocument{
+  \EQ_overload_ams_begin:n {equation}
+  \MH_let:cc {endAmSequation}{endequation}
+  \MH_let:cc {endAmSequation*}{endequation*}
+  \MH_if_boolean:nT {overload_ams}{
+    \def\EQ_renew_ams_environment:n #1{%
+      \MaybeMHPrecedingSpacesOff
+      \renewenvironment{#1}[1][]{%
+        \setkeys{\EQ_options_name:}{##1}%
+        \setkeys{EmphEqEnv}{AmS#1}%
+        \EmphEqMainEnv
+      }{\endEmphEqMainEnv}
+      \MHPrecedingSpacesOn
+    }
+    \EQ_new_equationtype:nnn     {EmphEqEnv}{AmSalign}   {1}
+    \EQ_new_equationtype:nnn     {EmphEqEnv}{AmSalign*}  {2}
+    \EQ_new_equationtype:nnn     {EmphEqEnv}{AmSgather}  {3}
+    \EQ_new_equationtype:nnn     {EmphEqEnv}{AmSgather*} {4}
+    \EQ_new_equationtype:nnn     {EmphEqEnv}{AmSflalign} {5}
+    \EQ_new_equationtype:nnn     {EmphEqEnv}{AmSflalign*}{6}
+    \EQ_new_equationtype_arg:nnn {EmphEqEnv}{AmSalignat} {7}
+    \EQ_new_equationtype_arg:nnn {EmphEqEnv}{AmSalignat*}{8}
+    \EQ_overload_ams_begin:n {gather}
+    \MH_let:cc {endAmSgather}{endgather}
+    \MH_let:cc {endAmSgather*}{endAmSgather}
+    \EQ_renew_ams_environment:n {gather}
+    \EQ_renew_ams_environment:n {gather*}
+    \EQ_overload_ams_begin:n {equation}
+    \MH_keyval_alias_with_addon:nnnn {EmphEqEnv} {AmSequation}
+      {AmSgather}{\EQ_disable_linebreak:}
+    \MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{AmSequation*}
+      {AmSgather*}{\EQ_disable_linebreak:}
+    \EQ_renew_ams_environment:n {equation}
+    \EQ_renew_ams_environment:n {equation*}
+    \EQ_overload_ams_begin:n {align}
+    \MH_let:cc {endAmSalign}{endalign}
+    \EQ_overload_ams_end:n {align*}
+    \EQ_renew_ams_environment:n {align}
+    \EQ_renew_ams_environment:n {align*}
+    \EQ_overload_ams_begin:n {flalign}
+    \EQ_overload_ams_end:n {flalign}
+    \EQ_overload_ams_end:n {flalign*}
+    \EQ_renew_ams_environment:n {flalign}
+    \EQ_renew_ams_environment:n {flalign*}
+    \EQ_overload_ams_begin:n {alignat}
+    \EQ_overload_ams_end:n {alignat}
+    \EQ_overload_ams_end:n {alignat*}
+    \MaybeMHPrecedingSpacesOff
+    \newcommand*\EQ_alignat_optional:w [1][]{
+      \setkeys{\EQ_options_name:}{#1}
+      \EmphEqMainEnv}
+    \MHPrecedingSpacesOn
+    \renewenvironment{alignat}[1]{
+      \setkeys{EmphEqEnv}{AmSalignat=#1}
+      \EQ_alignat_optional:w}
+      {\endEmphEqMainEnv}
+    \renewenvironment{alignat*}[1]{%
+      \setkeys{EmphEqEnv}{AmSalignat*=#1}%
+      \EQ_alignat_optional:w}%
+      {\endEmphEqMainEnv}
+    \DeclareRobustCommand{\[}{\begin{AmSequation*}}
+    \DeclareRobustCommand{\]}{\end{AmSequation*}}
+    \MH_keyval_alias:nnn {EmphEqEnv}{gather}  {AmSgather}
+    \MH_keyval_alias:nnn {EmphEqEnv}{gather*} {AmSgather*}
+    \MH_keyval_alias:nnn {EmphEqEnv}{align}   {AmSalign}
+    \MH_keyval_alias:nnn {EmphEqEnv}{align*}  {AmSalign*}
+    \MH_keyval_alias:nnn {EmphEqEnv}{flalign} {AmSflalign}
+    \MH_keyval_alias:nnn {EmphEqEnv}{flalign*}{AmSflalign*}
+    \MH_keyval_alias:nnn {EmphEqEnv}{alignat} {AmSalignat}
+    \MH_keyval_alias:nnn {EmphEqEnv}{alignat*}{AmSalignat*}
+    \MH_if_boolean:nT {good_mult}{
+      \EQ_overload_ams_begin:n {multline}
+      \MH_let:cc {endAmSmultline}{endmultline}
+      \MH_let:cc {endAmSmultline*}{endAmSmultline}
+      \MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{AmSmultline}
+        {AmSgather}{\MH_set_boolean_T:n {outer_mult}}
+      \MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{AmSmultline*}
+        {AmSgather*}{\MH_set_boolean_T:n {outer_mult}}
+      \EQ_renew_ams_environment:n {multline}
+      \EQ_renew_ams_environment:n {multline*}
+    }
+    \MH_if_boolean:nT {overload_amsII}{
+      \MH_protected:\def\[#1\]{\begin{equation*} #1\end{equation*}}
+      \MH_if_boolean:nF {good_mult}{
+        \EQ_overload_ams_begin:n {multline}
+        \MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{AmSmultline}
+          {AmSflalign}{\MH_set_boolean_T:n {multline}}
+        \MH_keyval_alias_with_addon:nnnn {EmphEqEnv}{AmSmultline*}
+          {AmSflalign*}{\MH_set_boolean_T:n {multline}}
+        \EQ_renew_ams_environment:n {multline}
+        \EQ_renew_ams_environment:n {multline*}
+      }
+    }
+  }
+}
+\endinput
+%%
+%% End of file `empheq.sty'.