Please always provide a
self-contained and
minimal example to make a problem comprehensible instantly for all others. Otherwise it can happen that you get no answer because nobody knows your document setup. Furthermore people are rarely motivated to build a complete example just to test possible solutions for you.
The cell content in the
{array} environment is typeset in text style. Therefore such operators like integrals appear too small in arrays (or matrices). You have to switch to display style by
\displaystyle to get the desired size. This can be simplified by new column types defined with commands by the
array package.
Code: Select all
\documentclass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage{geometry}
\usepackage{mathtools} % loads »amsmath«
\usepackage{array} % Enhancements for {array} and {tabular}
\newcolumntype{C}{>{\displaystyle}c}
\begin{document}
\begin{subequations}
\renewcommand*{\arraystretch}{1.2}
\begin{align}
\textbf{X}_0 &=
\left[
\begin{array}{CC}
\mu \int_{0}^{2b} A_{,y}^{T} A_{,y} dy & 0 \\[5\jot]
0 & 2\mu \int_{0}^{2b} A_{,y}^{T} B_{,y} dy
\end{array}
\right]\\[2\jot]
\textbf{Y}_1 &=
\left[
\begin{array}{CC}
0 & \lambda \int_{0}^{2b} A^{T} N_{,y} dy -\mu \int_{0}^{2b} B_{,y}^{T} N dy\\[5\jot]
-\lambda \int_{0}^{2b} C_{,y}^{T} D dy +\mu \int_{0}^{2b} C^{T} B_{,y} dy & 0
\end{array}
\right]
\end{align}
\end{subequations}
\end{document}
For details referto the manuals of the involved packages.
Remarks:
- The font switch
\bf is obsolete LaTeX2.09 syntax. The correct LaTeX2ε syntax would be \bfseries. Here it is better to use \textbf.
- It seems preferable to use the
align environment from amsmath in order to get those equations aligned properly here.
- Never use
\\ to introduce a new line or paragraph in justified text. New paragraphs are introduced either by a blank line or by \par.
Thorsten
