Equation

• Multiline equation with single number – use split environment

    \begin{align}
        \label{eq:bellman}
        \begin{split}
            V_{t}\left(S_{t}\right)= &\max _{a_{t} \in \mathcal{A}_{t}}\bigg(C_{t}\left(S_{t}, a_{t}\right) \\ &+ \gamma \sum_{s^{\prime} \in \mathcal{S}} \mathbb{P}\left(S_{t+1}=s^{\prime} \mid S_{t}, a_{t}\right) V_{t+1}\left(s^{\prime}\right)\bigg)
        \end{split}
    \end{align}
  

  

• Centering the subscript or superscript – use \limits

  • First declare the operator, take argmax as an example

      \DeclareMathOperator*{\argmax}{argmax}
    

  • Then apply the limits

      \begin{equation}
          \pi_{t} \in \argmax\limits_{\pi \in \Pi} \mathbb{E}\left[R_{t}(\pi)\right]
      \end{equation}