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效果图:
演示代码:
\documentclass{article}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{305.0pt}
\usepackage{CJK}
\usepackage{amsmath}
\begin{CJK}{GBK}{song}
\begin{document}
\begin{equation}
\begin{split}
\lvert I_2 \rvert
&=
\left\lvert \int_{0}^T \psi(t)
\left\{ u(a, t) - \int_{\gamma(t)}^a
\frac{d\theta}{k}
(\theta, t) \int_{a}^\theta c (\xi) u_t (\xi, t) \,d\xi
\right\} dt
\right\rvert
\\
&\le C_6
\Biggl\lvert
\left\lvert f \int_\Omega \left\lvert
\widetilde{S}^{-1,0}_{a,-} W_2(\Omega, \Gamma_l)
\right\rvert \ \right\rvert
\left\lvert \lvert u \rvert
\overset{\circ}{\to} W_2^{\widetilde{A}} (\Omega; \Gamma_r,T)
\right\rvert
\Biggr\rvert
\end{split} \end{equation}
\begin{align}
\lvert I_2 \rvert &=
\left\lvert
\int_{0}^T \psi(t)
\left\lbrace
u(a, t) - \int_{\gamma(t)}^a \frac {d\theta} k(\theta, t)
\int_{a}^\theta c (\xi) u_t (\xi, t) \,d\xi
\right\rbrace dt
\right\rvert
\notag \\
&\le C_6
\Biggl\lvert
\left\lvert f \int_\Omega
\left\lvert
\widetilde{S}^{-1,0}_{a,-} W_2(\Omega, \Gamma_l)
\right\rvert \