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我一生都找不到錯誤

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我一生都找不到錯誤

我在背面有這段文本，底部有一個方程式，但我找不到背面無法編譯的原因。它說我缺少 $ 或 { 但我沒有看到那裡有問題。 Overightharp 是我導入的一個包，而且工作正常，所以這不是問題。這是怎麼回事？

The stiffness matrix $\bf{K}$ of the physical reservoir 
is a function of $\overrightharp{x}$, where 
$\overrightharp{x}=\[x_1(t), x_(t),...,x_D(t)\]$ 
is a collection of all displacements for $D$ 
masses/nodes/neurons. Since the mass displacements 
vary as a function of time, the stiffness matrix 
dies as well. Consequently, the system's eigenvalues 
and eigenfrequencies vary as a function of time. Using 
the discretized time-scale $m=1,2,3,...,M$ with time-step 
$dt$, the system's eigenvalues $\overrightharp{\lambda}(m)$ 
and eigenfrequencies $\overrightharp{\omega}(m)$  are found 
analytically for each time step by solving the by solving the 
Quadratic Eigenvalue Problem (QEP) shown below, where 
$\overrightharp{v}(m)$ are the eigenvectors at each each 
time-step $m$. There are a total of $2D$ eigenvalues, unlike 
traditional eigenvalue problems where there are $D$ eigenvalues \cite{QEP}.

\begin{equation}
   \left(\bf{M} \overrightharp{\lambda^2}(m)+\bf{C}\overrightharp{\lambda}(m)
   +\bf{K}\right)\overrightharp{v}(m) = 0
\end{equation}

答案1

的參數\overrightharp以文字模式排版（參見https://mirror.las.iastate.edu/tex-archive/macros/latex/contrib/harpoon/harpoon.pdf），所以使用$\overrightharp{\lambda}$不起作用，因為它就像\lambda用文本書寫一樣。相反，您可以使用\overrightharp{$\lambda$}.

例如，更改$\overrightharp{\lambda}(m)$為\overrightharp{$\lambda$}$(m)$.

編輯：這可行，但魚叉會有點醜。該accents軟體包可能效果更好，請參閱https://tex.stackexchange.com/a/426353/319442。

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