> < ^ Date: Fri, 02 Sep 1994 10:16:00 +0100 (WET)
> < ^ From: Thomas Breuer <Thomas.Breuer@Math.RWTH-Aachen.DE >
< ^ Subject: Re: some bugs in DisplayCharTable

Dear Mrs. and Mr. Forum,

yesterday Peter Blanchard told about several problems with the
'DisplayCharTable' command.

1. Some tables cause alignment problems in output.

I tried Peter's example with versions 3.2, 3.3 and 3.4 of GAP,
and could not reproduce a strange behaviour.
For finding out what went wrong, it would be nice if Peter could
send me the output he got.

2. Not all of the features work. The manual page claims that one
may select certain characters or a character to display. I have
found that this only works for a list which begins with 1.
I have illustrated this twice in the follwing session.

gap> arec := rec( chars:= 5); DisplayCharTable(tbl,arec);

This did not work in GAP-3.3 but is fixed in GAP-3.4.

3. The same errors occur when one trys to select particular
classes as the manual claims you should be able to. Illustrated

gap> arec := rec( classes := 2); DisplayCharTable(tbl,arec);

This is indeed a bug that still exists in GAP-3.4. It will be fixed
with the next upgrade. For the moment, one can get around it using

gap> arec:= rec( classes:= [2] ); DisplayCharTable( tbl, arec );

Thanks for the nice bug report,

Thomas Breuer

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