of scan to be in a certain form, which is not true anymore if constant
folding replaces them by a constant.

node in a graph.

madness of elemwise operation introduced by infershape of subtensor and by
scan and makes plots of computational graphs readable and possibly faster.

check if they still use as little memory as needed in FAST_RUN.

gradients.

the key ( in this case the right key .. for scan to figure things out).

optimizer to use a limited amount of memory instead of forcing scan to do
that. This way you can compute gradients through reduce, foldl and flodr as
well.

there is one or not.

added some type checking / an error message to scan so it will fail a little more gracefully if passed bad arguments

added name of output variable error message to facilitate debugging (can someone who knows who the exception works push it into the text of the exception?)

characters.

division by 0)