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Dear Mrs. and Mr. Forum,

yesterday Akihiro Munemasa sent two bug reports to 'gap-trouble'.

The first was about an error message that occurs in some cases

in the computation of (rational) conjugacy classes.

For example, 'ConjugacyClasses( GU(2,5) )' will produce this.

The second was about the groups 'GU(2,q)' and 'SU(2,q)'. Here one

gets no error message. But the groups one gets with these commands

are not the required unitary groups.

Two other bugs in GAP-3.3 should be mentioned which meanwhile

were found in Aachen.

The first is in the new implementation of the LLL algorithm;

in some cases the computed basis is not LLL-reduced, or it contains

zero vectors.

The other bug is in one of the programs that are used to compute the

canonical representative of conjugacy classes in Ag groups; in some

cases the question whether two elements are conjugate is answered ``no''

although in fact the elements are conjugate.

All these bugs will be fixed in the next version of GAP.

Kindest regards

Thomas Breuer

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