列表：不转义公式

Question 1

您收到的错误（但未完整显示）是

! Missing $ inserted.
<inserted text> 
                $
l.24      -- n^2-1=6.255+\frac{2.316λ
                                      ^2}{λ^2-0.6263^2}+\frac{2.765λ^2}{λ...

换行符准确地显示了 TeX 到达的位置。您定义了 λ 来执行数学命令，\lambda因此出现错误。

\documentclass[12pt,paper=a4,]{scrreprt}    

\usepackage{listings}
\lstdefinestyle{mystyle}{%
inputencoding=utf8,
extendedchars=true, % i have some special chars...
mathescape=false,   % i do not like fancy formulas
escapeinside={},    % i do not like to escape something
escapechar={},      % so i have no char defined
texcl=false         % and i do not wanna make fancy comments too..
}
\lstset{style=mystyle}
\lstset{literate=%            % if i add those characters here i got less errors of not recognized characters 
{λ}{{$\lambda$}}1
{µ}{{$\micro$}}1
{^}{{\textasciicircum}}1
{²}{{\textasciicircum{2}}}1
}
\usepackage{listingsutf8}

\begin{document}

\begin{lstlisting}[language={[5.3]Lua}]
     -- n^2-1=6.255+\frac{2.316λ^2}{λ^2-0.6263^2}+\frac{2.765λ^2}{λ^2-32.935^2}
\end{lstlisting}

\end{document}

Answer

您收到的错误（但未完整显示）是

! Missing $ inserted.
<inserted text> 
                $
l.24      -- n^2-1=6.255+\frac{2.316λ
                                      ^2}{λ^2-0.6263^2}+\frac{2.765λ^2}{λ...

换行符准确地显示了 TeX 到达的位置。您定义了 λ 来执行数学命令，\lambda因此出现错误。

\documentclass[12pt,paper=a4,]{scrreprt}    

\usepackage{listings}
\lstdefinestyle{mystyle}{%
inputencoding=utf8,
extendedchars=true, % i have some special chars...
mathescape=false,   % i do not like fancy formulas
escapeinside={},    % i do not like to escape something
escapechar={},      % so i have no char defined
texcl=false         % and i do not wanna make fancy comments too..
}
\lstset{style=mystyle}
\lstset{literate=%            % if i add those characters here i got less errors of not recognized characters 
{λ}{{$\lambda$}}1
{µ}{{$\micro$}}1
{^}{{\textasciicircum}}1
{²}{{\textasciicircum{2}}}1
}
\usepackage{listingsutf8}

\begin{document}

\begin{lstlisting}[language={[5.3]Lua}]
     -- n^2-1=6.255+\frac{2.316λ^2}{λ^2-0.6263^2}+\frac{2.765λ^2}{λ^2-32.935^2}
\end{lstlisting}

\end{document}

Question 2

LaTeX 之所以插入，是$因为它识别出您正试图以数学模式书写，但这是错误的。因此，它会尝试为您纠正错误。下面是一个示例，说明了如何在数学模式下进行操作，以及您在第一次编辑中提出的主要问题：

\documentclass{article}
\usepackage[utf8]{inputenc}

\usepackage{natbib}
\usepackage{graphicx}

\title{}
\author{}

\usepackage{amsmath}
\usepackage{siunitx}

\begin{document}

\SI{1.55}{\micro\metre}

more text goes here 

Foo is great, and uses:
$\epsilon_r= n^{2}-\kappa^{2}$

Bar is better, using the expression:
$\frac{2.316\lambda^{2}}{\lambda^{2}-0.6263^{2}}$

\end{document}

输出以下内容：

关于您更新的当前代码：

\documentclass[12pt, paper=a4]{scrreprt}    

\usepackage{listings}
\lstdefinestyle{mystyle}{%
inputencoding=utf8,
extendedchars=true, % i have some special chars...
mathescape=false,   % i do not like fancy formulas
escapeinside={},    % i do not like to escape something
escapechar={},      % so i have no char defined
texcl=false         % and i do not wanna make fancy comments too..
}
\lstset{style=mystyle}
\lstset{literate=%            % if i add those characters here i got less errors of not recognized characters 
{λ}{{$\lambda$}}1
{µ}{{$\micro$}}1
{^}{{\textasciicircum}}1
{²}{{\textasciicircum{2}}}1
}
\usepackage{listingsutf8}

\begin{document}

\begin{lstlisting}[language={[5.3]Lua}]
     n^2-1=6.255+\frac{2.316λ^2}{λ^2-0.6263^2}+
     \frac{2.765λ^2}{λ^2-32.935^2}
\end{lstlisting}

\end{document}

使用 LuaLaTeX，并在第二个分数之前加一个换行符，输出如下：

据我所知，除非你写了类似的东西，否则不可能使用数学模式之外的东西：

this circle \( \circ \) is followed by the lambda symbol \( \lambda \)

第一个例子中的输出变成：

Answer