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^ Subject:

At the request of a potential GAP user, I forward the following request

for information. Please reply either to the Forum or directly to Mr. Pop.

In my original reply to him I suggested that he might consider using

GAP, but that I was not familar enough with his problem to tell him

which GAP functions would be most helpful. I also suggested that his

question might be better suited to math.sci, but that some GAP users

might be able to help him out, and I suggested that he post a note to

the Forum after checking to see what GAP resources he had available at

his university. This is his response.

C.R.B. Wright

--------------------------

I would like to ask if anyone may help me with the following problem:

I need to do some calculations in the ring of quantum matrices

for n=4 or 5.

These are iterated Ore rings so we have in hand substitutions,

eventually any monomial can be written as a sum of ordered

monomials. For n=3 I can do it by hand, but already n=4 is messy

and I try to find if :

1 - Do you know of any software that does such calculations (for

noncommutative Ore polynomials) or alike ?

2 - Is there a way of doing it in Maple, Mathematica, etc?

3 - Do you know somebody that knows about it or can help?

Of course if necessary I may write myself a program but

I would be happy to learn that it was already done.

I would really appreciate your help.

Sincerely yours,

Horia Pop

14MLH, Department of Mathematics

The University of Iowa

Iowa City, IA 52242-1419

e-mail hpop@math.uiowa.edu

tel: (319) 335-3253 office (319) 339-8678 home fax: (319) 335-0627

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