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Speed up Exponent for groups with known conjugacy classes #4902

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Jun 22, 2022
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Speed up Exponent for groups with known conjugacy classes #4902

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5 changes: 5 additions & 0 deletions lib/grp.gi
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Original file line number Diff line number Diff line change
Expand Up @@ -1277,6 +1277,11 @@ function(G)
return exp;
end);

# ranked below the method for abelian groups
InstallMethod( Exponent,
[ "IsGroup and IsFinite and HasConjugacyClasses" ],
G-> Lcm(List(ConjugacyClasses(G), c-> Order(Representative(c)))) );

InstallMethod( Exponent,
"method for finite abelian groups with generators",
[ IsGroup and IsAbelian and HasGeneratorsOfGroup and IsFinite ],
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