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如何忽略左邊距並將居中的數學方程式向左移動？

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如何忽略左邊距並將居中的數學方程式向左移動？

我有一個以下等式在此輸入影像描述

我需要將其向左移動一點，因為它太靠近右側，並且在列印時可能會被夾住。

這些方程式正在使用$$ R=... $$語法。我怎麼才能把它移到左邊？

編輯

更改為\[ ... \]語法後：

\begin{description}
\item[Model matrix] \hfill \\
...
\begin{itemize}
\item Rotation matrix - used to rotate vertex (vertices) by a specifed angle $\alpha$ around specified axis, where each from 3 axes has its own rotation matrix
\[
R_x = \begin{bmatrix} 1 & 0 & 0 & 0 \\ 0 & \cos(\alpha) & -\sin(\alpha) & 0 \\ 0 & \sin(\alpha) & \cos(\alpha) & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix},
\newline
R_y = \begin{bmatrix} \cos(\alpha) & 0 & \sin(\alpha) & 0 \\ 0 & 1 & 0 & 0 \\ -\sin(\alpha) & 0 & \cos(\alpha) & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix},
\newline
R_z = \begin{bmatrix} \cos(\alpha) & -\sin(\alpha) & 0 & 0 \\ \sin(\alpha) & \cos(\alpha) & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix}
\]
\end{itemize}

答案1

透過插入相當於以下內容的負空格來調整清單的累積縮排\@totalleftmargin：

在此輸入影像描述

\documentclass{article}
\usepackage[margin=1in,showframe]{geometry}% Just for this example
\usepackage{amsmath}
\begin{document}
\begin{description}
  \item[Model matrix] \hfill \\
    \ldots

    \begin{itemize}
      \item Rotation matrix - used to rotate vertex (vertices) by a specifed angle $\alpha$ around specified axis, where each from 3 axes has its own rotation matrix
      \[
        \makeatletter
        \hspace*{-\@totalleftmargin}
        \makeatother
        R_x = \begin{bmatrix} 1 & 0 & 0 & 0 \\ 0 & \cos(\alpha) & -\sin(\alpha) & 0 \\ 0 & \sin(\alpha) & \cos(\alpha) & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix},
        \quad
        R_y = \begin{bmatrix} \cos(\alpha) & 0 & \sin(\alpha) & 0 \\ 0 & 1 & 0 & 0 \\ -\sin(\alpha) & 0 & \cos(\alpha) & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix},
        \quad
        R_z = \begin{bmatrix} \cos(\alpha) & -\sin(\alpha) & 0 & 0 \\ \sin(\alpha) & \cos(\alpha) & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix}
      \]
    \end{itemize}
\end{description}

\[
  R_x = \begin{bmatrix} 1 & 0 & 0 & 0 \\ 0 & \cos(\alpha) & -\sin(\alpha) & 0 \\ 0 & \sin(\alpha) & \cos(\alpha) & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix},
  \quad
  R_y = \begin{bmatrix} \cos(\alpha) & 0 & \sin(\alpha) & 0 \\ 0 & 1 & 0 & 0 \\ -\sin(\alpha) & 0 & \cos(\alpha) & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix},
  \quad
  R_z = \begin{bmatrix} \cos(\alpha) & -\sin(\alpha) & 0 & 0 \\ \sin(\alpha) & \cos(\alpha) & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix}
\]

\end{document}

或者，根據需要將方程式左移或多或少。例如，-\leftmargin僅刪除最深的壓痕。

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