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hulpke committed Jul 29, 2024
1 parent 6dc0dc6 commit b3f628c
Showing 1 changed file with 4 additions and 8 deletions.
12 changes: 4 additions & 8 deletions lib/grp.gd
Original file line number Diff line number Diff line change
Expand Up @@ -4362,10 +4362,6 @@ DeclareAttribute( "IsomorphismFpGroup", IsGroup );
## [ (1,2), (1,2,3,4,5) ] -> [ F1, F2 ]
## gap> fp := Image( iso );
## <fp group of size 120 on the generators [ F1, F2 ]>
## gap> RelatorsOfFpGroup( fp );
## [ F1^2, F2^5, (F2^-1*F1)^4, (F1*F2^-1*F1*F2)^3, (F1*F2^-2*F1*F2^2)^2\
## F2^-1*(F2^-1*F1)^2*F2^2*(F1*F2^-1)^2*F2^-1*F1*F2*F1,
## (F1*F2^-2)^2*F2^-1*F1*F2^3*F1*F2^-3 ]
## ]]></Example>
## <P/>
## The main task of the function
Expand All @@ -4392,9 +4388,9 @@ DeclareAttribute( "IsomorphismFpGroup", IsGroup );
## (1,12)(2,11)(3,6)(4,8)(5,9)(7,10) ])
## gap> gens := GeneratorsOfGroup( M12 );;
## gap> iso := IsomorphismFpGroupByGenerators( M12, gens );;
## #I the image group has 3 gens and 21 rels of total length 669
## #I the image group has 3 gens and 24 rels of total length 669
## gap> iso := IsomorphismFpGroupByGenerators( M12, gens );;
## #I the image group has 3 gens and 21 rels of total length 414
## #I the image group has 3 gens and 20 rels of total length 414
## ]]></Example>
## <P/>
## Also in the case of a permutation group <A>G</A>, the function
Expand Down Expand Up @@ -4443,7 +4439,7 @@ DeclareAttribute( "IsomorphismFpGroup", IsGroup );
## #I the image group has 3 gens and 11 rels of total length 92
## gap> iso := IsomorphismFpGroupByGenerators( M12, gens :
## > method := "fast" );;
## #I the image group has 3 gens and 176 rels of total length 3170
## #I the image group has 3 gens and 136 rels of total length 3170
## ]]></Example>
## <P/>
## Though the option <C>method := "regular"</C> is only checked in the case
Expand All @@ -4465,7 +4461,7 @@ DeclareAttribute( "IsomorphismFpGroup", IsGroup );
## [ [ 0, 1, 0, 0, 0 ], [ 0, 0, 1, 0, 0 ], [ 0, 0, 0, 1, 0 ],
## [ 1, 0, 0, 0, 0 ], [ 0, 0, 0, 0, 1 ] ] ]
## gap> iso := IsomorphismFpGroupByGenerators( G, gens );;
## #I the image group has 2 gens and 8 rels of total length 128
## #I the image group has 2 gens and 11 rels of total length 128
## gap> iso := IsomorphismFpGroupByGenerators( G, gens :
## > method := "regular");;
## #I the image group has 2 gens and 6 rels of total length 56
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