hi, we had discussions about lyx mathbox and limits for the sum and int-symbol. there are some irritating behaviour in lyx math box with the commands \limits \displaystyle \textstyle \scriptstyle \scriptscriptstyle on the other hand there are some important facts to remember where are the differences between the math-array and math- eqnarray-environment. i summerized all these facts and wrote a mini-faq. if you are interested in it, please have a look and feel free to comment it in any way. maybe that i'm totally wrong and that there are some better solutions. Herbert -- [EMAIL PROTECTED] http://perce.de/voss/lyx/
#LyX 1.1 created this file. For more info see http://www.lyx.org/ \lyxformat 2.16 \textclass article \begin_preamble \newcommand{\bigmath}[1]{\displaystyle{#1}} \newcommand{\normalmath}[1]{\textsyle{#1}} \newcommand{\smallmath}[1]{\scriptstyle{#1}} \newcommand{\tinymath}[1]{\scriptscriptstyle{#1}} \newcommand\myLimits{\limits} \let\newcommand=\providecommand \end_preamble \language default \inputencoding latin1 \fontscheme default \graphics default \paperfontsize default \spacing single \papersize Default \paperpackage a4 \use_geometry 0 \use_amsmath 0 \paperorientation portrait \secnumdepth 3 \tocdepth 3 \paragraph_separation indent \defskip medskip \quotes_language english \quotes_times 2 \papercolumns 1 \papersides 1 \paperpagestyle default \layout Subsection* Inlinemath \layout Standard Mathstuff \begin_inset Formula \( \left( \begin{array}{cc} a & b\\ c & d \end{array}\right) \) \end_inset in a textline is called \series bold inlinemode. \series default They are always vertically centered and in fact of big linespacing \begin_inset Formula \( \int _{3}^{5}\sin \frac{1}{x}dx \) \end_inset limits should appear only as super- or subscript. Latex allows both modes over/under \begin_inset Formula \( \int\limits _{3}^{5}\sin \frac{1}{x}dx \) \end_inset and super/sub \begin_inset Formula \( \ \sum _{i=0}^{17}i \) \end_inset . Toggling between these modes is possible with \series bold Alt-m-l \series default (the cursors position must be before or behind the symbol). \layout Subsection* Displaymath \layout Standard Another mathmode is the \series bold displaymode \series default , where the equation is like a parbox. Now equation-numbering is possible with \series bold Alt-m-n \series default and toggling off with \series bold Alt-m-N \series default : \layout Standard \begin_inset Formula \begin{equation} \label{Gl1} \sum _{i=0}^{\infty }\sin \frac{1}{x}\neq \int _{3}^{5}\sin \frac{1}{x}dx=\int\limits _{3}^{5}\sin \frac{1}{x}dx \end{equation} \end_inset \layout Standard In displaymath the big-symbols are used and the limits can be write in both modes. \layout Subsection* array-environment \layout Standard Matrizes can be construct as tables (arrays), where each cell is a centered mathmode-text like the inlinemode. The following equation shows this: \layout Standard \begin_inset Formula \begin{equation} \label{Gl2} \underline{A}=\left( \begin{array}{cccc} a_{11} & \ \sum\nolimits \myLimits _{i=0}^{5}(i+1) & \sum _{i=0}^{5}(i+1) & \int _{0}^{5}(i+1)dx\\ a_{21} & a_{22} & a_{23} & a_{24} \end{array}\right) \end{equation} \end_inset \layout Standard The problem is, that lyx don't write the \latex latex \backslash verb/ \backslash limits/ \latex default -command for the sum, therefore the limits are only super/subscript. Inserting the \latex latex \backslash verb/ \backslash limits/ \latex default -command by hand don't solve the problem. Saving and rereading the lyx-file the \latex latex \backslash verb/ \backslash limits/ \latex default -command: the \latex latex \backslash verb/ \backslash limits/ \latex default -command get lost! A solution for this behaviour is to write a limit-macro. \layout Subsection* eqnarray-environment \layout Standard A special mathemode is the equanarray-environment, which has per line three parts: \layout Standard \align center left formula- middleformula -rightformula \layout Standard \begin_inset Formula \begin{equation} \begin{array}{ccc} left & middle & right \end{array} \end{equation} \end_inset \layout Standard This environment is construct with ctrl-enter in the blue lyx math-box. \layout Standard left and right formula are the same as a single displaymath, so there is the same behaviour as in Eqn \begin_inset LatexCommand \ref{Gl1} \end_inset . The only difference is that the left formula is formattted right and the right formula formatted left. But the middle part is different, it's centered and there are always the small math-symbols and toggeling between super/subscript and above/under-limits is always possible: \layout Standard \begin_inset Formula \begin{eqnarray} \textstyle \sum _{i=0}^{\infty }\sin \frac{1}{x} & \int _{3}^{5}\sin \frac{1}{x}dx & \int _{3}^{5}\cos \frac{1}{x}dx\\ \sum _{i=0}^{\infty }\sin \frac{1}{x} & \ \sum\limits _{i=0}^{\infty }\sin \frac{1}{x} & \sum _{i=0}^{\infty }\sin \frac{1}{x}\\ \smallmath {\sum _{i=0}^{5}\frac{i}{3}} & \bigmath {\int _{0}^{5}(i+1)di} & \smallmath {\sum\limits _{i=0}^{\infty }\sin \frac{1}{x}}\label{Gl6} \\ \int _{0}^{5}(i+1)di & \ \int\limits _{\bigmath {0}}^{5}(i+1)di & \oint _{0}^{5}(i+1)\tinymath {di} \end{eqnarray} \end_inset \layout Standard With the \latex latex \backslash verb/ \backslash displaystyle/ \latex default -command it's possible to change the size to the displaymath-format but it's the same behaviour, lyx ingores this command after saving and rereading. It's the same with the other mathfonts-commands: \layout Itemize \latex latex \backslash verb/ \backslash textstyle/ \layout Itemize \latex latex \backslash verb/ \backslash scriptstyle/ \layout Itemize \latex latex \backslash verb/ \backslash scriptscriptstyle/ \layout Standard Therefore four new macros are defined in the latex preamble: \layout Itemize \latex latex \backslash verb/ \backslash newcommand{ \backslash bigmath}[1]{ \backslash displaystyle{#1}}/ \latex default \layout Itemize \latex latex \backslash verb/ \backslash newcommand{ \backslash normalmath}[1]{ \backslash textsyle{#1}}/ \latex default \layout Itemize \latex latex \backslash verb/ \backslash newcommand{ \backslash smallmath}[1]{ \backslash scriptstyle{#1}}/ \latex default \layout Itemize \latex latex \backslash verb/ \backslash newcommand{ \backslash tinymath}[1]{ \backslash scriptscriptstyle{#1}}/ \layout Itemize \latex latex \backslash verb/ \backslash newcommand{ \backslash myLimits}{ \backslash limits}/ \layout Standard With these macros the style of the formulas can be changed and lyx don't forget this one (Eqn \begin_inset LatexCommand \ref{Gl6} \end_inset ). \layout Subsection* Mathboxes in tablecells \layout Standard Another way is useful, if no equantionnumbers are needed. Working with a table and single formulas in the cells is sometimes the better way: \layout Standard \latex latex \backslash renewcommand \backslash arraystretch{2.0} \layout Standard With \latex latex \backslash verb/ \backslash renewcommand \backslash arraystretch{2.0}/ \latex default it's possible to change the vertical space in the table. \layout Standard \added_space_top 0.3cm \added_space_bottom 0.3cm \align center \LyXTable multicol5 2 4 0 0 -1 -1 -1 -1 0 0 0 0 0 0 0 0 8 0 0 "" "" 8 0 0 "" "" 8 0 0 "" "" 8 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" \begin_inset Formula \( \frac{1}{2}+\sum\limits _{3}^{3}\sin \alpha \) \end_inset \newline \begin_inset Formula \( \frac{1}{2}+\sum\limits _{3}^{3}\sin \alpha \) \end_inset \newline \begin_inset Formula \( \frac{1}{2}+\sum _{3}^{3}\sin \alpha \) \end_inset \newline 0 \newline 1 \newline 2 \newline 3 \newline 1 \layout Standard \latex latex \backslash renewcommand \backslash arraystretch{1.0} \layout Standard Resetting the vertical tablespace with \latex latex \backslash verb/ \backslash renewcommand \backslash arraystretch{1.0}/ \latex default Here is the same table with borders: \layout Standard \latex latex \backslash renewcommand \backslash arraystretch{2.0} \layout Standard \added_space_top 0.3cm \added_space_bottom 0.3cm \align center \LyXTable multicol5 2 4 0 0 -1 -1 -1 -1 1 0 0 0 1 1 0 0 8 1 1 "" "" 8 0 0 "" "" 8 1 1 "" "" 8 0 1 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" 0 8 1 0 0 0 0 "" "" \begin_inset Formula \( \frac{1}{2}+\sum _{3}^{3}\sin \alpha \) \end_inset \newline \begin_inset Formula \( \frac{1}{2}+\sum _{3}^{3}\sin \alpha \) \end_inset \newline \begin_inset Formula \( \frac{1}{2}+\ \sum\limits _{3}^{3}\sin \alpha \) \end_inset \newline 0 \newline 1 \newline 2 \newline 3 \newline 1 \layout Standard \latex latex \backslash renewcommand \backslash arraystretch{1.0} \layout Standard \added_space_top vfill [EMAIL PROTECTED] \layout Standard \latex latex \backslash today \the_end
