\cdbalgorithm{tree}{}

Display the internal tree form of a given
expression. Can be used on a single expression or on an entire tree:
\begin{screen}{1,2,3,10}
A_{m n}:
B_{m n}:
@tree(1);
(1): \history  (0)
  1:{\expression}  (1)
  2:  {A}  (2)
  3:    _{m}  (3)
  4:    _{n}  (3)
  5:  \asymimplicit  (2)
@tree;
(1): {\expression}  (1)
  1:  {A}  (2)
  2:    _{m}  (3)
  3:    _{n}  (3)
  4:  \asymimplicit  (2)

(2): {\expression}  (1)
  1:  {B}  (2)
  2:    _{m}  (3)
  3:    _{n}  (3)
  4:  \asymimplicit  (2)
\end{screen}
Most expressions lead to extremely lengthy output, so it is useful to
redirect it to a file using output redirection.

