Dear Mr. Tang Ko Cheung,

Since Martin Schoenert, to whose answer in the GAP Forum you reply, is
at present absent from aachen and will be so for the next few days, I
just want to reply briefly instead.

GAP has not got notebook or worksheet faciliies like Mathematica or
Maple. These are certainly nice commodities, nevertheless we have not
put a similar development anywhere in our priority list. Please
realize that we are a small mathematics department and our first
priority is the development of the mathematical facilities of
GAP. Generally speaking, perhaps also commercial systems have both a
stronger natural interest as well as more free means for the
development of such parts of the surface.

As to the very detailed technical points in your letter, I do not
think that they are of great interest to the large majority of the
more than 300 participants of the GAP-forum. For answering such
question we have created the address GAP-trouble, where we try as well
as we can to answer such questions too without bothering the forum
members. I expect that Martin Schoenert will try to answer (with copy
to the small group of experts reading the GAP-trouble correspondence),
also your further technical questions. May I suggest however that we
stop their further discussion in the GAP-forum.

With kind regards Joachim Neubueser