#LyX 2.4 created this file. For more info see https://www.lyx.org/
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\usepackage{ifpdf}

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\usepackage[colorlinks=true,
 pdftitle=Formelnummerierung, pdfpagemode=none,
 pdfpagelayout=OneColumn, pdfstartview=XYZ,
 pdfauthor={Uwe Stohr},
 pdfsubject={LaTeX/LyX numbering example},
 pdfkeywords={LaTeX, numbering, LyX}]{hyperref}

\else % if DVI

\usepackage[colorlinks=true, hypertex]{hyperref}

\fi

% define Roman counter
\newcounter{rom}
\renewcommand{\therom}{\roman{rom}}

% remember the original counter
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\newcommand{\org@theeq}{}
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% \setrom activates the Roman counter
\newcommand{\setrom}{
  \let\c@equation\c@rom
  \let\theequation\therom}

% \setarab activates the original Arabic counter
\newcommand{\setarab}{
  \let\c@equation\c@org@eq
  \let\theequation\org@theeq}
% Added by lyx2lyx
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\begin_body

\begin_layout Standard
この文書は，
二つの数式カテゴリの使い方を示すものです．一つのカテゴリにはアラビア数字，
もう一つはローマ数字で番号が振られています．
\end_layout

\begin_layout Standard
\begin_inset Formula 
\begin{equation}
A=B\label{eq:B}
\end{equation}

\end_inset


\begin_inset Formula 
\begin{equation}
A=C\label{eq:C}
\end{equation}

\end_inset


\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
setrom
\end_layout

\end_inset


\begin_inset Formula 
\begin{equation}
A=D\label{eq:D}
\end{equation}

\end_inset


\begin_inset Formula 
\begin{equation}
A=E\label{eq:E}
\end{equation}

\end_inset


\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
setarab
\end_layout

\end_inset


\begin_inset Formula 
\begin{equation}
A=F\label{eq:F}
\end{equation}

\end_inset


\begin_inset Formula 
\begin{equation}
A=G\label{eq:G}
\end{equation}

\end_inset


\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
setrom
\end_layout

\end_inset


\begin_inset Formula 
\begin{equation}
A=H\label{eq:H}
\end{equation}

\end_inset


\begin_inset Formula 
\begin{equation}
A=I\label{eq:I}
\end{equation}

\end_inset


\end_layout

\begin_layout Standard
相互参照：

\begin_inset CommandInset ref
LatexCommand eqref
reference "eq:B"
nolink "false"

\end_inset

 ,
 
\begin_inset CommandInset ref
LatexCommand eqref
reference "eq:C"
nolink "false"

\end_inset

 ,
 
\begin_inset CommandInset ref
LatexCommand eqref
reference "eq:F"
nolink "false"

\end_inset

 ,
 
\begin_inset CommandInset ref
LatexCommand eqref
reference "eq:G"
nolink "false"

\end_inset

 ,
 
\begin_inset CommandInset ref
LatexCommand eqref
reference "eq:D"
nolink "false"

\end_inset

 ,
 
\begin_inset CommandInset ref
LatexCommand eqref
reference "eq:E"
nolink "false"

\end_inset

 ,
 
\begin_inset CommandInset ref
LatexCommand eqref
reference "eq:H"
nolink "false"

\end_inset

 ,
 
\begin_inset CommandInset ref
LatexCommand eqref
reference "eq:I"
nolink "false"

\end_inset


\end_layout

\begin_layout Standard
\noindent
\begin_inset CommandInset line
LatexCommand rule
offset "0.5ex"
width "100line%"
height "1pt"

\end_inset


\begin_inset VSpace medskip
\end_inset

この例を作成するには，
ローマ数字の数式のカウンタをまず定義しなくてはなりません．そのためには，
\SpecialChar LaTeX
プリアンブルに以下のように入力します．
\end_layout

\begin_layout Standard

\series bold

\backslash
newcounter{rom}
\begin_inset Newline newline
\end_inset


\backslash
renewcommand{
\backslash
therom}{
\backslash
roman{rom}}
\end_layout

\begin_layout Standard
\begin_inset Newpage newpage
\end_inset

アラビア数字カウンタ
\series bold
equation
\series default
の値を保存するには，
プリアンブルに以下のように入力します．
\end_layout

\begin_layout Standard

\series bold

\backslash
newcommand{
\backslash
c@org@eq}{}
\begin_inset Newline newline
\end_inset


\backslash
let
\backslash
c@org@eq
\backslash
c@equation
\begin_inset Newline newline
\end_inset


\backslash
newcommand{
\backslash
org@theeq}{}
\begin_inset Newline newline
\end_inset


\backslash
let
\backslash
org@theeq
\backslash
theequation
\end_layout

\begin_layout Standard
文書中で二つの連番スキームの間を切り替えるには，
ローマ数字用に
\end_layout

\begin_layout Standard

\series bold

\backslash
newcommand{
\backslash
setrom}{
\backslash
let
\backslash
c@equation
\backslash
c@rom
\backslash
let
\backslash
theequation
\backslash
therom}
\end_layout

\begin_layout Standard
というコマンドをプリアンブルで定義し，
アラビア数字用には
\end_layout

\begin_layout Standard

\series bold

\backslash
newcommand{
\backslash
setarab}{
\backslash
let
\backslash
c@equation
\backslash
c@org@eq
\backslash
let
\backslash
theequation
\backslash
org@theeq}
\end_layout

\begin_layout Standard
と定義します．
\end_layout

\begin_layout Standard
各数式は，
既定ではアラビア数字で連番が振られます．ローマ数字に切り替えるには\SpecialChar TeX
コードで
\series bold

\backslash
setrom
\series default
コマンドを挿入します．
\series bold

\backslash
setarab
\series default
コマンドで連番はアラビア数字に切り替わります．
\end_layout

\end_body
\end_document