> < ^ From:

^ Subject:

Dear forum members,

Let me first apologise that without prior warning the forum has not

been working properly for a few weeks. In the course of some

reconfiguration of our computers and service software the mailer for

the forum has been replaced in order to get better protection against

unwanted bouncing of mail etc. . However it has taken more time than

anticipated to get over some difficulties with the new mailer. As a

result of this some incoming mail for the forum has waited some time

until it is sent round now and also a letter of mine has reached some

of you more than once and in truncated form. I append this letter

again and hope that it will now reach all in full. We hope that now

the forum is back to order. We think that no mail to the forum has got

lost in this process, but if this should be the case with some letter

of yours would you please be so kind to send it in again now.

Let me also answer in public and again with apologies some questions

and (quite justified) complaints that have been sent a few times to

gap-trouble:

There has been no send-out of patches for GAP 3.3 so far, the first

one will come only after the end of this month.

It always takes some time until a new GAP version or a patch is

available from all servers listed in the GAP-Announcement. This is not

completely under our control but needs the help of the local

adminstrators of these servers. We apologize for inconvenience caused

by trying without success to obtain announced releases from some

servers, on which it became available only later. Please try to obtain

the software in such cases from the Aachen server.

For some of the ports to other computers we rely on the generous help

of colleagues since we do not have these computers easily available to

us here. This is in particular so with the port to MAC's. Please

understand that these therefore will as a rule become available only

with a certain delay, since the port has to be done by these third

parties after the release of the new version and they may well be

occupied with more urgent own work just at that moment.

Wishing you a good 1994 and in spite of all listed above some further fun with GAP Joachim Neubueser

Here then once more and hopefully finally my letter

====================================================================== In his letter to the GAP-forum of Dec. 13, Jeffrey Hsu asked:

I'm interested in teaching abstract algebra with GAP. Are there any

course material available for this purpose. I read in manual.dvi

that there were several in preperation. What's the status of these

efforts and has students found them helpful as supplementary

exercises?

The short passage in the preface of the manual, which Jeffrey Hsu is

quoting, refers to a discussion in the GAP-forum in 1992, when Michael

K. Johnson and Donald L. Kreher reported about plans to develop course

material for the use of GAP for teaching abstract algebra. I have

also given a description of the situation in Aachen in the GAP-forum

at that time. For convenience I append the three letters to this one.

(Please note at this occasion that all non-trivial correspondance in

the GAP-forum is available in the GAP-distribution in the 'etc'

subdirectory.)

In the meantime we have held the workshop on Computational Group

Theory during the Groups '93 conference in Galway this August and this

included 'practical exercises' using GAP, for which we had prepared a

set of problems and solutions. We intend to supplement this by further

problems, organise these problems and solutions in a standard form and

make the whole file available through ftp together with GAP

eventually; at present, if somebody wants to have it, we can send this

collection in its not completely well-organised form without warranty.

I would very much welcome if Michael K. Johnson and Donald L. Kreher

as well as others who might have used GAP in teaching could tell us in

the GAP-forum about their experience and in fact, if such exists

meanwhile, could make course material available.

Kind regards Joachim Neubueser ================================================================== Michel K. Johnson's letter:

Date: Sat, 31 Oct 1992 00:37:32 +01

From: Michael K Johnson <johnsonm@stolaf.edu>

Subject: Teaching Abstract Algebra with GAP

A few of us at St. Olaf are writing a Laboratory Manual for GAP which

is intended to complement (although it does not /require/) Joseph

Gallian's text Contemporary_Abstract_Algebra. We would like to know

if anyone else is using GAP to teach undergraduate abstract algebra,

and if so, what pedagogical materials you use or have developed.

If anyone is using GAP in this way, please contact me.

michaelkjohnson

===================================================================== Donald L. Kreher's letter:

Date: Mon, 2 Nov 1992 13:35:49 +0100

From: Donald L. Kreher <kreher@math.mtu.edu>

Subject: Re: Teaching Abstract Algebra with GAP

A few of us at St. Olaf are writing a Laboratory Manual for GAP which

is intended to complement (although it does not /require/) Joseph

Gallian's text Contemporary_Abstract_Algebra. We would like to know

if anyone else is using GAP to teach undergraduate abstract algebra,

and if so, what pedagogical materials you use or have developed.

If anyone is using GAP in this way, please contact me.

michaelkjohnson

I was hoping to do rougghly the same, but with Rotman's Group Theory

Text. I would be very interested in seeing your Lab Manual. Also in

particular I would be interested in any other recomendations from

persons using GAP in Graduate Group Theory, Algebra or Discrete

Mathematics Courses.

Don Kreher

Kreher@math.mtu.edu

======================================================================== My letter: Subject: Use of GAP in teaching Date: Mon, 2 Nov 1992 17:05:28 MET

Michael K. Johnson and Don Kreher report that they are working on the

development of course material using GAP and ask where else work of

this kind is done.

It will be no surprise that we do use GAP in teaching in Aachen,

although we have not written a laboratory manual or systematic course

material. In order to explain the situation it should perhaps first be

explained that the contents of courses is less fixed in German

universities than it usually seems to be in the US, that is, each of

us rather goes his own way in teaching a course on group theory, say,

and may also change his course from one year to another. With this

reservation made, one can say that we have perhaps two main lines in

integrating algorithmic methods and the use of a system such as GAP

into such a course.

In one line, which I have followed two years ago, I gave a course that

was entitled "Groups, theory and algorithms" parts I and II over a

full year, in which algorithmic aspects and methods were closely knit

into the theory, e.g. the course - that assumed a course on Algebra I

which gave the basics up to Jordan-Hoelder and Sylow - started with

free groups and presentations and alongside with the theory introduced

computational methods such as Todd-Coxeter, Reidemeister-Schreier,

Low-index and IMD. These then were treated through easy

hand-calculations as well as examples using programs in the exercises

( at that time we had partially to resort to SPAS because the

algorithms were not all in GAP yet, but they will be in GAP 3.2 to be

released soon ). In a similar way then permutation groups, soluble

groups and p-groups were treated. This course was followed by a

further year on representation theory, of which I gave the first

semester on ordinary representation theory, again interlacing theory

with computational methods mainly for charactertheory, again using

GAP, which provides quite a lot of possibilities in this field.

For these courses we have files with the weekly exercises given to

the students and some percentage of these involve the use of GAP. If

somebody is interested to get these ( in German and not specially

organized for export ) we will be happy to send them.

In another setup, which we follow this year, my colleague, Prof.

Pahlings will give a more traditional one-semester course on group

theory, in which again GAP may be used occasionally, but more as a

black box, while most of the algorithmic aspects will be treated in a

separate course by me next summer, in which GAP will naturally play a

more central role. Prof Pahlings meanwhile will already go on to

representation theory next summer.

We have followed that line also some years ago, both seem to have

advantages and drawbacks and I really cannot say that I recommend one

of them as the better setup.

Generally we tend to allow or even recommend the use of GAP also in

other courses such as the introductory algebra course. We hope that

for students, who nowadays tend to come being pretty well used to

PASCAL or the like, using GAP is not so difficult, so in these courses

usually we have made no attempt with a systematic introduction to GAP

but rather have "let things happen" and this is perhaps even so with

the above-mentioned courses. But I am sure we could do better than

that and hence I would be very interested to get whatever course

material is developed. I would also very much welcome if such material

- perhaps after some test with students - could be made generally

available alongside with GAP.

Joachim Neubueser

> < [top]