Hi,

in
questions where students have to find the solution set of an
equation it would be helpful if they could also enter the set of
the real numbers, namely in a way, that Maxima also realizes it as a set.

The point is, that I would like to set Check_Type to true in the input options. Then the students have to enter a set and not a list or a single solution. But next to the empty set {} and any finite set like {1,2,3} also the set of the real numbers should be accepted. I was thinking of recommending "all" as the proper answer if the solution set was the set of the real numbers, but "all" is no set in Maxima.

Therefore if I then use the option Check_Type the students will not be allowed to enter a regular set and I basicly give away the solution, if I don't use the option Check_Type some will probably not type any set.

Is there any solution to this?

Stephan.