缺少} 插入。\end{split}

Question

\begin{equation}
\begin{split}
${\delta _{k + 1}} = {\theta _{k + 1}} - {\theta _k}$ \\
\end{split} 
\end{equation}

我正在使用 TeXstudio 编写方程式。我收到以下错误。我是 latex 的初学者

Missing } inserted. \end{split}

我必须插入哪里}？

Answer 1

你$里面有虚假的split：

\documentclass{article}

\usepackage{amsmath}

\begin{document}


\begin{equation}
\begin{split}
{\delta _{k + 1}} = {\theta _{k + 1}} - {\theta _k} \\
\end{split} 
\end{equation}

\end{document}

顺便说一句：如果它只是方程内的线，split则完全不需要。

Answer 2

我还删除了不必要的括号：

% My standard header for TeX.SX answers:
\documentclass[a4paper]{article} % To avoid confusion, let us explicitly 
                                 % declare the paper format.

\usepackage[T1]{fontenc}         % Not always necessary, but recommended.
% End of standard header.  What follows pertains to the problem at hand.

\usepackage{amsmath}



\begin{document}

Some text.
\begin{equation}
    \begin{split}
        \delta_{k + 1} &= \theta_{k + 1} - \theta_{k} \\
        &= \text{there should be an alignment point, shouldn't it?}
    \end{split} 
\end{equation}

\end{document}

Answer 3

避免$、\\和行距

\begin{equation}
    \begin{split}
        \delta _{k + 1} = \theta _{k + 1} - \theta _k
    \end{split}
\end{equation}