如何增加 \begin{align} 块中行的垂直间距

Question

我想知道如何增加 中的行垂直间距align。示例代码如下：

\begin{align*}
    \left(\left(\psi_{1}\Rightarrow\psi_{2}\right)\Leftrightarrow 1\right) & \,\,\Longleftrightarrow\,\, \left(A_{1}\not \subset B_{1}\,\Leftrightarrow 1\right) \,\vee\,\left(A_{2}\subset B_{2}\,\Leftrightarrow 1\right)  \\
    & \,\,\Longleftrightarrow\,\,\left(\psi_1\Leftrightarrow0\right)\,\vee\,\left(\psi_{2} \Leftrightarrow 1 \right)    
    \\ \medskip
    \left(\left(\psi_{1}\Rightarrow\psi_{2}\right)\Leftrightarrow 0\right) & \,\,\Longleftrightarrow\,\, \left(  A_{1}\subset B_{1}\,\Leftrightarrow1\right)\,\wedge\,\left(A_{2}\not \subset B_{2}\,\Leftrightarrow1\right) \\
    & \,\,\Longleftrightarrow\,\, \left(\psi_{1}\Leftrightarrow 1\right) \,\wedge\,\left(\psi_{2}\Leftrightarrow0\right)
\end{align*}

不幸的是，medskip在这种情况下不起作用，也不起作用vspace。如果使用两个align块，则两者之间的间距会太大。

Answer 1

只需使用换行符的可选参数：

    \documentclass{article}
    \usepackage{mathtools}

    \begin{document}

    \begin{align*}
        \left(\left(\psi_{1}\Rightarrow\psi_{2}\right)\Leftrightarrow 1\right) & \,\,\Longleftrightarrow\,\, \left(A_{1}\not \subset B_{1}\,\Leftrightarrow 1\right) \,\vee\,\left(A_{2}\subset B_{2}\,\Leftrightarrow 1\right) \\
        & \,\,\Longleftrightarrow\,\,\left(\psi_1\Leftrightarrow0\right)\,\vee\,\left(\psi_{2} \Leftrightarrow 1 \right)
        \\[2ex]
        \left(\left(\psi_{1}\Rightarrow\psi_{2}\right)\Leftrightarrow 0\right) & \,\,\Longleftrightarrow\,\, \left( A_{1}\subset B_{1}\,\Leftrightarrow1\right)\,\wedge\,\left(A_{2}\not \subset B_{2}\,\Leftrightarrow1\right) \\
        & \,\,\Longleftrightarrow\,\, \left(\psi_{1}\Leftrightarrow 1\right) \,\wedge\,\left(\psi_{2}\Leftrightarrow0\right)
    \end{align*}

    \end{document}