[LON-CAPA-users] coding a customresponse problem using &cas()

[Gerd Kortemeyer]

Hi Again,

> On May 25, 2015, at 9:49 PM, Justin Gray <jgray at math.sfu.ca> wrote:
> 
> P.S. Ideally, I would like to stipulate that students provide a nontrivial example (excluding the zero matrix and the identity matrix) but that is the topic of another discussion.

I don’t know enough MAXIMA. How would you test for this in MAXIMA?

is(A=(0))
is(A=([1,0],[0,1]))

Would that catch it?

And if they enter that, should they be charged a try?

- Gerd.