+\end_inset
+
+ redefines the predefined command
+\series bold
+
+\backslash
+theequation
+\series default
+ to the command
+\series bold
+
+\backslash
+roman{equation}
+\series default
+.
+\begin_inset Foot
+status collapsed
+
+\begin_layout Plain Layout
+The command
+\series bold
+
+\backslash
+renewcommand
+\series default
+ has the same scheme like the command
+\series bold
+
+\backslash
+newcommand
+\series default
+ that is described in
+\begin_inset CommandInset ref
+LatexCommand ref
+reference "subsec:The-Command-newcommand"
+
+\end_inset
+
+.
+\end_layout
+
+\end_inset
+
+
+\series bold
+equation
+\series default
+ is the formula counter.
+ When the command
+\series bold
+
+\backslash
+the
+\series default
+ is used as prefix for a counter, the value of the counter is output as
+ Arabic number.
+ When a formula is numbered, \SpecialChar LaTeX
+ sets internally the command
+\series bold
+
+\backslash
+theequation
+\series default
+ behind the formula.
+
+\series bold
+
+\backslash
+roman{equation}
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Commands ! R !
+\backslash
+roman
+\end_layout
+
+\end_inset
+
+
+\series default
+ outputs the counter as small Roman number.
+\end_layout
+
+\begin_layout Standard
+All formulas behind the command
+\series bold
+
+\backslash
+renew
+\series default
+c
+\series bold
+ommand
+\series default
+ are now numbered Roman.
+ To switch to numbering with big Roman numbers, the command is inserted
+ again, but
+\series bold
+
+\backslash
+roman
+\series default
+ is replaced by
+\series bold
+
+\backslash
+Roman
+\series default
+
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Commands ! R !
+\backslash
+roman@
+\backslash
+Roman
+\end_layout
+
+\end_inset
+
+.
+ To
+\begin_inset Quotes eld
+\end_inset
+
+number
+\begin_inset Quotes erd
+\end_inset
+
+ with small Latin letters there is the command
+\series bold
+
+\backslash
+alph
+\series default
+
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Commands ! A !
+\backslash
+alph
+\end_layout
+
+\end_inset
+
+, for big ones there is the command
+\series bold
+
+\backslash
+Alph
+\series default
+
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Commands ! A !
+\backslash
+alph@
+\backslash
+Alph
+\end_layout
+
+\end_inset
+
+.
+\end_layout
+
+\begin_layout Standard
+\begin_inset Note Greyedout
+status open
+
+\begin_layout Plain Layout
+
+\series bold
+Note:
+\series default
+ Only maximal 26
+\begin_inset space ~
+\end_inset
+
+formulas can be numbered with Latin letters in one document.
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Plain Layout
+
+
+\backslash
+renewcommand{
+\backslash
+theequation}{
+\backslash
+roman{equation}}
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Formula
+\begin{equation}
+A=\textrm{small roman}
+\end{equation}
+
+\end_inset
+
+
+\begin_inset ERT
+status collapsed
+
+\begin_layout Plain Layout
+
+
+\backslash
+renewcommand{
+\backslash
+theequation}{
+\backslash
+Roman{equation}}
+\end_layout
+
+\end_inset
+
+
+\begin_inset Formula
+\begin{equation}
+B=\textrm{big Roman}\label{eq:Rom}
+\end{equation}
+
+\end_inset
+
+
+\begin_inset ERT
+status collapsed
+
+\begin_layout Plain Layout
+
+
+\backslash
+renewcommand{
+\backslash
+theequation}{
+\backslash
+alph{equation}}
+\end_layout
+
+\end_inset
+
+
+\begin_inset Formula
+\begin{equation}
+C=\textrm{small Latin}
+\end{equation}
+
+\end_inset
+
+
+\begin_inset ERT
+status collapsed
+
+\begin_layout Plain Layout
+
+
+\backslash
+renewcommand{
+\backslash
+theequation}{
+\backslash
+Alph{equation}}
+\end_layout
+
+\end_inset
+
+
+\begin_inset Formula
+\begin{equation}
+D=\textrm{big Latin}\label{eq:Lat}
+\end{equation}
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+To switch back to the default numbering, insert the command:
+\end_layout
+
+\begin_layout Standard
+
+\series bold
+
+\backslash
+renewcommand{
+\backslash
+theequation}{
+\backslash
+arabic{equation}}
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Commands ! A !
+\backslash
+arabic
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Plain Layout
+
+
+\backslash
+renewcommand{
+\backslash
+theequation}{
+\backslash
+arabic{equation}}
+\end_layout
+
+\end_inset
+
+
+\begin_inset Formula
+\begin{equation}
+E=\textrm{Arabic}
+\end{equation}
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset VSpace medskip
+\end_inset
+
+As you see, formulas are numbered serially independent from the numbering
+ style.
+ When then numbering should start with
+\begin_inset Quotes eld
+\end_inset
+
+1
+\begin_inset Quotes erd
+\end_inset
+
+ when the style is changed, new equation counters have to be defined.
+ A description about this can be found in the file
+\begin_inset CommandInset href
+LatexCommand href
+name "Formula-numbering.lyx"
+target "run:Formula-numbering.lyx"
+literal "false"
+
+\end_inset
+
+.
+\end_layout
+
+\begin_layout Subsection
+User-defined Numbering
+\begin_inset CommandInset label
+LatexCommand label
+name "subsec:User-defined-Numbering"
+
+\end_inset
+
+
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Formula numbering ! user-defined
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Note Greyedout
+status open
+
+\begin_layout Plain Layout
+
+\series bold
+Note:
+\series default
+ If the document language is a right-to-left language such as Arabic, you
+ must add this to the to the \SpecialChar LaTeX
+-preamble to be able to use the commands described
+ in this section:
+\begin_inset Newline newline