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Dear Forum,

I have tried to calculate maximal subgroups of symmetric groups

using MaximalSubgroups in GAP 3.4.4.

This was successfull for all n not greater then 8, but for n=9

I obtain the following message:

Error, sorry, can' t identify the group's solvable residuum in

struct.operations.RepresentativesPerfectSubgroups( struct ) called from

RepresentativesPerfectSubgroups( ShallowCopyNoSC( G ) ) called from

struct.operations.LatticeSubgroups( struct ) called from

LatticeSubgroups( G ) called from

G.operations.ConjugacyClassesMaximalSubgroups( G ) called from

...

What does it mean ?

Whether function MaximalSubgroups couldn't work in this case ?

Sincerely yours,

Alexander B. Konovalov,

Zaporozhye State University, Zaporozhye, Ukraine.

E-mail: konovalov@member.ams.org, algebra@hotmail.zp.ua

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