overleaf 中未定义的控制序列错误

overleaf 中未定义的控制序列错误

使用 overleaf 时,我的 latex 代码中有 3-4 个部分出现“未定义的控制序列”错误。我在序言中加载了 amsmath。我无法理解原因是什么或如何修复它。我分享了错误指向的代码段:

第一次出现:

\begin{equation*} \small
    n(\ell)= \frac{k\log(\ell)}{\max\limit_{(\gamma,q_{sp})}
    h\Big(E\Big[e^{-\frac{\gamma}{V  \sigma^{2}P+\sigma_{w}^{2}}}\Big]\Big)- 
    E\Big[h\Big(e^{-\frac{\gamma}{V  \sigma^{2}P+\sigma_{w}^{2}}}\Big)\Big]}
\end{equation*} \normalsize where $E(.)$ denotes the expectation for  $V \sim 
 \operatorname{Bin}(k, q_{sp})$, $q_{sp}$ is the probability  $\gamma$ denotes threshold.

第二次出现:

\begin{equation} 
    n(\ell) \geq \frac{k\log(\ell)}{\max\limit_{(\gamma,q_{sp})}h\Big(E\Big[e^{- 
    \frac{\gamma}{V  \sigma^{2}P+\sigma_{w}^{2}}}\Big]\Big)-E\Big[h\Big(e^{- 
    \frac{\gamma}{V  \sigma^{2}P+\sigma_{w}^{2}}}\Big)\Big]}.\label{equ}
\end{equation}

第三次出现:

  \begin{equation}
    C=\max\limit_{(\gamma,\textbf{q})} I(\Tilde{\textbf{X}};Z) \label{sumcap}
    \end{equation} where $\textbf{q} =\{q_{a_1} \ldots q_{a_k}\}$ are sampling 
    probabilities of   $\{a_1 \ldots a_k\}$, i.e., $X^{a_i}  \sim Bern(q_{a_i})$  
    such that  $X^{a_i}\ind X^{a_j}  $ $\forall i,j \in  \{1,\ldots k\}; i\neq j$.

我觉得一切都正常。但不知何故,情况却并非如此。有人能帮我解决这个问题吗?

答案1

第一个错误的完整错误消息是:

<argument> \max \limit 
                       _{(\gamma ,q_{sp})} h\Big (E\Big [e^{-\frac {\gamma }...
l.7 ...{V  \sigma^{2}P+\sigma_{w}^{2}}}\Big)\Big]}
                                                  
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

注意:“顶行末尾的控制序列...”所以它指向了\limit,可能应该是\lim

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