如何讓枚舉標籤左對齊

Question

我有這個 MWE：

\documentclass[12pt,a4paper]{article}

\usepackage{nicematrix}

\begin{document}
\begin{enumerate}
\item 

\begin{center}

$\begin{pNiceMatrix}[first-row,first-col]
 & \{1,2\} & \{1,3\} & \{1,4\} & \{2,3\} & \{2,4\} & \{3,4\} \\
x_1 & 1 & 0 & 1 & 0 & 0 & 0 \\
x_2 & -1 & 0 & 0 & 1 & 1 & 0 \\
x_3 & 0 & 0 & 0 & -1 & 0 & 1 \\
x_4 & 0 & 0 & -1 & 0 & -1 & -1 \\
\end{pNiceMatrix}$

\end{center}

\item Two.
\item Three.

\end{enumerate}
\end{document}

不幸的是，矩陣之前的 1. 也居中。我怎樣才能避免這種情況？

Answer 1

快速而骯髒的駭客：

\documentclass[12pt,a4paper]{article}

\usepackage{nicematrix}

\begin{document}
\begin{enumerate}
\item  \hfill $\begin{pNiceMatrix}[first-row,first-col]
 & \{1,2\} & \{1,3\} & \{1,4\} & \{2,3\} & \{2,4\} & \{3,4\} \\
x_1 & 1 & 0 & 1 & 0 & 0 & 0 \\
x_2 & -1 & 0 & 0 & 1 & 1 & 0 \\
x_3 & 0 & 0 & 0 & -1 & 0 & 1 \\
x_4 & 0 & 0 & -1 & 0 & -1 & -1 \\
\end{pNiceMatrix}$\hfill\mbox{}

\item Two.
\item Three.

\end{enumerate}
\end{document}

Answer 2

一個簡單的解決方案是將矩陣放入 a 中minipage：

\documentclass[12pt,a4paper]{article}

\usepackage{nicematrix}

\begin{document}
\begin{enumerate}
\item 
\begin{minipage}{\linewidth}
\begin{center}
$\begin{pNiceMatrix}[first-row,first-col]
 & \{1,2\} & \{1,3\} & \{1,4\} & \{2,3\} & \{2,4\} & \{3,4\} \\
x_1 & 1 & 0 & 1 & 0 & 0 & 0 \\
x_2 & -1 & 0 & 0 & 1 & 1 & 0 \\
x_3 & 0 & 0 & 0 & -1 & 0 & 1 \\
x_4 & 0 & 0 & -1 & 0 & -1 & -1 \\
\end{pNiceMatrix}$
\end{center}
\end{minipage}
\item Two.
\item Three.

\end{enumerate}
\end{document}