open the branching tactical \verb+[+. Then you can interact with the system
reaching a proof of the first case, without having to specify the whole
branching tactical. When you have proved all the induction cases, you close
- the branching tactical with \verb+]+ and you are done with a structured proof
- without the.
+ the branching tactical with \verb+]+ and you are done with a structured proof.
\item[Rereading]
is possible. Going on step by step shows exactly what is going on.
Consider again a proof by induction, that starts applying the induction