[Latex] Math Equations

最新推荐文章于 2021-11-10 11:02:04 发布

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本文深入探讨了amsmath包在数学公式撰写中的应用，包括内联公式、显示公式、多行公式及详细使用技巧。

amsmath

1. amsmath

Since I am from school of mathematics, the most useful package for me is the amsmath, which helps me write beautiful math formulas.

1.1 Inline equations

We can use $...$ to write inline equations. For example

This is first inline equation $\alpha_1 +\beta_1 = \gamma_1$, \(\alpha_2+\beta_2=\gamma_2\)

Result

1.2 Displayed equations

Recommended environments
- \[...\] un-numbered
- \begin{equation*}...\end{equation*} un-numbered
- \begin{equation}...\end{equation} numbered automatically
Seldom use
- \begin{math}...\end{math}
- \begin{displaymath}...\end{displaymath}
Not recommended
- $$...$$

% alternative 1
\[\sqrt{\mu+\delta}=\kappa\]

% alternative 2
\begin{equation*}
  \sqrt{\mu+\delta}=\kappa
\end{equation*}

% alternative 3
\begin{equation}
  \sqrt{\mu+\delta}=\kappa
\end{equation}

1.3 multi-line equations

Alternatives

Recommended
- \begin{split}...\end{split} which is a subordinate environment that can be used as the contents of equation environment or the contents of one line in a multiple equation structure such as align or gather.
- \begin{multline}...\end{multline} not-aligned
- \begin{gather}...\end{gather} not-aligned
- \begin{align}...\end{align} aligned
Not recommended
- \begin{eqnarray*}...\end{eqnarray*} un-numbered
- \begin{eqnarray}...\end{eqnarray} numbered
- because they produce inconsistent spacing of the equal signs and make no attempt to prevent overprinting of the equation body and equation number.

% split
\begin{equation}
  \begin{split}
    \xi+\zeta&=\theta\\
    \mu+\phi&=\tau
  \end{split}
\end{equation}

% gather
\begin{gather}
  a+b+c+d+e+f+g+h+j+\\
  k+l+m+n
\end{gather}

% multline
\begin{multline}
  a+b+c+d+e+f+g+h+j+\\
  k+l+m+n
\end{multline}

% align
\begin{align}
  a+b&=c\\
  d+e&=f
\end{align}