3.5 Non-geometric target space

\subsubsection{Tree-level amplitudes} \subsubsection{One-loop amplitudes}

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