6.2 Quantize

\subsubsection{Tree-level amplitudes} \subsubsection{One-loop amplitudes} \subsubsection{UV finiteness} ^[1] \subsubsection{$l_s\to0$ $l_s\to\infty$ \& $g_s\to 0$ limits}

\begin{outline}[enumerate] \1 Supergravity limit ($l_s\to0$): ^[2]^[3] \1 Higher spin limit ($l_s\to\infty$): \1 Free quantum string limit ($g_s\to 0$): Only tree level. \1 Classical interacting limit ($\hbar\to0$): \end{outline}