但我有:
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\[
\int{\prod_{i=1}^{m+1}|f_{i}|d\mu} \leq
||f_{1}||_{p_{1}}
\left[
\prod_{i=2}^{m+1}
\left(
\int|f_{i}|^{p_{1}/(p_{1}-1) p_{i}(p_{1}-1)/p_{1}}d\mu
\right)^{p_{1}/p_{i}(p_{1}-1)}
\right]^{(p_{1}-1)/p_{1}}
\]
\[
= ||f_{1}||_{p_{1}}
\prod_{i=2}^{m+1}
\left(
\int|f_{i}|^{p_{i}} d\mu
\right)^{\frac{1}{p_{i}}}
\]
\end{document}
答案1
一些建议:
使用
align
环境来包含 display-math 材料的两行使用
\notag
第一行中的指令来抑制方程编号的排版对所有大括号和方括号使用
\biggl
and\biggr
加载
mathtools
包(包的超集amsmath
)并定义名为\abs
和的宏\norm
。这将使读取输入代码变得更加容易可选:在指数周围放置括号,
\abs{f_i}
以帮助读者弄清楚发生了什么
\documentclass{article}
\usepackage{mathtools} % for '\DeclarePairedDelimiter' macro
\DeclarePairedDelimiter\abs\lvert\rvert
\DeclarePairedDelimiter\norm\lVert\rVert
\begin{document}
\begin{align}
\int \prod_{i=1}^{m+1} \abs{f_{i}}\,d\mu
&\leq \norm{f_{1}}_{p_{1}}
\biggl[\,
\prod_{i=2}^{m+1}
\biggl(
\int|f_{i}|^{[p_{1}/(p_{1}-1) p_{i}(p_{1}-1)/p_{1}]}\,d\mu
\biggr)^{\!p_{1}/p_{i}(p_{1}-1)}
\,\biggr]^{(p_{1}-1)/p_{1}}\notag\\
&= \norm{f_{1}}_{p_{1}}
\prod_{i=2}^{m+1}
\biggl(
\int|f_{i}|^{p_{i}} \,d\mu
\biggr)^{\!1/p_{i}}
\end{align}
\end{document}
答案2
借助于包的帮助split
和稍微小一点的裕度,geometry
您可以实现以下输出:
\documentclass{article}
\usepackage{geometry}
\usepackage{amsmath}
\begin{document}
\begin{equation}
\begin{split}
\int{\prod_{i=1}^{m+1}|f_{i}|d\mu} &\leq
\|f_{1}\|_{p_{1}}
\left[
\prod_{i=2}^{m+1}
\left(
\int|f_{i}|^{p_{1}/(p_{1}-1) p_{i}(p_{1}-1)/p_{1}}d\mu
\right)^{p_{1}/p_{i}(p_{1}-1)}
\right]^{(p_{1}-1)/p_{1}}\\
&= \|f_{1}\|_{p_{1}}
\prod_{i=2}^{m+1}
\left(
\int|f_{i}|^{p_{i}} d\mu
\right)^{\frac{1}{p_{i}}}
\end{split}
\end{equation}
\end{document}