I have this code ;
\documentclass[oneside]{oblivoir}
\usepackage{amsmath,amssymb,amsthm,mathrsfs,amsthm}
\usepackage{paralist,kotex,caption,mdframed,tabu,graphicx}
\begin{document}
\(g\) is a holomorphic function on the compact set \(\triangle\).
By the maximum modulus theorem, \(|g|\) attains its maximum on the boundary of \(\triangle\).
By symmetry of \(\triangle\), \(|g|\) attains its maximum on the segment \(ab\), where the segment can be parametrized by \(\gamma(t):[-1,1]\to\mathbb C\) as follows;
\[\gamma(t)=t\quad(-1\le t\le1)\]
The value of \(g\) on the segment can be written as
\[g(\gamma(t))=(t^2-1)(t-\sqrt3i)=t(t^2-1)-\sqrt3(t^2-1)i\]
and
\[\left|g(\gamma(t))\right|^2=t^2(t^2-1)^2+3(t^2-1)^2=(t^2-1)^2(t^2+3).\]
Since
\[
\frac{d}{dt}\left|g(\gamma(t))\right|^2
=2(t^2-1)\cdot2t(t^2+3)+(t^2-1)^2\cdot2t=2t(t^2-1)(3t^2+5)
\]
\(\left|g(\gamma(t))\right|^2\) has critical values(local maximum and local minimum) at \(t=-1\), \(t=0\), \(t=1\) where
\begin{center}
\tabulinesep=5pt
\begin{tabu}to.9\textwidth{X[1.5$c]|X[$c]|X[$c]|X[$c]|X[$c]|X[$c]}\toprule
t &-1 &\cdots &0 &\cdots &1 \\\hline
\frac d{dt}|g(\gamma(t))|^2 &0 &+ &0 &- &0 \\\hline
|g(\gamma(t))|^2 &\vbox{local minimum} &\nearrow &\vbox{ local maximum} &\searrow &\vbox{ local minimum}\\\bottomrule
\end{tabu}
\end{center}
Therefore, \(|g|\) has maximum value \(\sqrt3\) on the whole triangle \(\triangle\).
\end{document}
with the ugly result looks like
I don't want to enlarge the width of the second column, but want the word 'local minimum' be written in two lines, not three lines.
I tried to change the size of the font(normalsize, small, footnotesize, scriptsize, tiny), unsuccessfully even when the size is 'tiny'.
Is there any parameter like 'tabulinesep' or 'extrarowsep' to set the horizontal(not vertical) margin inside the cell?
tabu
package since it is unmaintained and buggy (github.com/tabu-issues-for-future-maintainer/tabu). Could you please also make your code compilable by adding the documentclass as well as the relevant packages. Do you use thegeometry
package? If so, please also include these settings.tabu
is not maintained (ii) some fixes are available at github (iii) for help you we need to provide an MWE (small complete document, with your table, which reproduce your problem.booktabs
package with vertical lines as they are incompatible (See teh small gap around the vertical lines)tabu
is good package, since an expert recommended it (six years ago). I didn't knowtabu
is outdated. I edited the question so that the codes in the preamble is visible. (I was usingoblivoir
, which I think is not that good package for english documents ; A korean expert recommended this class, on which we can use things related to Korean language)