Adjust expression

Question

How to adjust this expression

\documentclass[a4paper,twoside,12pt]{ article}
\usepackage[latin1,utf8,utf8x]{inputenc} 
\usepackage[T1]{fontenc} 
\usepackage[french]{babel} 
\frenchbsetup{StandardLists=true}
\usepackage{lmodern}
\usepackage{amsmath} 
%%%%%%%
\usepackage{tabstackengine}  
\TABstackMath
\TABstackMathstyle{\displaystyle}
\renewcommand\stacktype{L}
\renewcommand\stackalignment{r}
\setstackgap{L}{24pt}
%%%%%%%%%
\usepackage{amsfonts} 
\usepackage{amssymb} 
\usepackage{mathrsfs}
\usepackage{mathtools}
\usepackage{hyperref}
\usepackage{amsthm}
\usepackage[mathscr]{euscript}
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\usepackage{wrapfig}
\usepackage{latexsym}
\usepackage{mathtools}

\begin{document}



\begin{equation*}
\partial_tu(t,x)=\left\{
\begin{array}{l l}
\tabbedstackanchor{\Bigl(\partial_t\xi^t(x)R'(\xi^t(x))-\partial_xG(t,x)R(\xi^t(x))-R(\xi^t(x))\int_{\xi^t(x)}^t\partial_x^2G(s,\Phi(s,t,x))\partial_t\Phi(s,t,x)\,\mbox{d}s}{+\partial_t\xi^t(x)R(\xi^t(x))\partial_xG(\xi^t(x),1)\Bigr)\times\exp\left(-\int_{\xi^t(x)}^t\partial_x 
G(s,\Phi_{(t,x)}(s))\,\mbox{d}s\right) },&(t,x)\in \Omega_1\\[20pt]
\tabbedstackanchor{\Bigl(\partial_xG(t,x)u_0(\chi^t(x))+G(t,x)\partial_x\chi^t(x)u'_0(\chi^t(x))-u_0(\chi^t(x))\int_{t_)}^t\partial_x^2G(s,\Phi(s,t,x))\partial_t\Phi(s,t,x)\,\,\mbox{d}s\Bigr)}
{\times\exp\left(-\int_{t_0}^t\partial_xG(s,\Phi_{(t,x)}(s))\,\mbox{d}s\right) },&(t,x)\in \Omega_2\\[24pt]
0,&(t,x)\in\Omega_3
\end{array}
\right.
\end{equation*}
\end{document}

Please use a complete MWE that contains the \documentclass, all the \usepackages (and libraries if you use tikz or something like that), as well as the \begin{document} and \end{document}. Please refer to this and to this — Vinccool96, Apr 02 '19 at 01:37
Also, in addition to a full MWE, please define the nature of the desired adjustment. — Steven B. Segletes, Apr 02 '19 at 01:44

Zarko · Answer 1 · 2019-04-02T03:47:06.390

your equation is too huge that can be fit inside text area. as one solution is break math terms into more line:

\documentclass{article}
\usepackage[margin=25mm]{geometry}
\usepackage{mathtools,
            nccmath,
            amssymb}
\newcommand{\ud}{\,\mathrm{d}}

\usepackage{lipsum} % for dummy text

\begin{document}
\lipsum[1]
    \begin{equation*}\medmath{
\partial_tu(t,x)=
\begin{cases}
\begin{multlined}
\Bigl(\partial_t\xi^t(x)R'\bigl(\xi^t(x)\bigr) -        \\[-3ex]
      \partial_x G(t,x)R  \bigl(\xi^t(x)\bigr) -
      R(\xi^t(x)) \int_{\xi^t(x)}^t \partial_x^2G\bigl(s,\Phi(s,t,x)\bigr)
      \partial_t\Phi(s,t,x)\ud s +                      \\[-2ex]
      \partial_t\xi^t(x)R \bigl(\xi^t(x)\bigr)
                         \partial_x G\bigl(\xi^t(x),1\bigr)\Bigr)
    \times\exp\biggl(-\int_{\xi^t(x)}^t
        \partial_x G(s,\Phi_{(t,x)}(s))\ud s\biggr),
\end{multlined}
    &   (t,x)\in \Omega_1              \\[9ex]
\begin{multlined}
\Bigl(\partial_x G(t,x)u_0 \bigl(\chi^t(x)\bigr) +
    G(t,x)\partial_x \chi^t(x)u'_0\bigl(\chi^t(x)\bigr) -          \\[-2ex]
    u_0\bigl(\chi^t(x)\bigr)
    \int_{t_)}^t \partial_x^2 G\bigl(s,\Phi(s,t,x)\bigr)
                 \partial_t\Phi(s,t,x) \ud s\Bigr)
\times\exp\biggl(-\int_{t_0}^t \partial_x G(s,\Phi_{(t,x)}(s)) \ud s\biggr)
\end{multlined}
    &(t,x)\in \Omega_2              \\[7ex]
0,
    &   (t,x)\in\Omega_3
\end{cases}
    }\end{equation*}
\lipsum[2]
\end{document}

which gives:

as you can see, i practically rewrote your equation. instead array i use cases environment (from the amsmath package which is loaded by mathtools), define \ud for derivative, repair all your brackets mismatch in wrote whole equation in smaller fonts by use of macro \medmath from the package nccmath.

Adjust expression

1 Answers1