Group cohomology of alternating group:A6
This article gives specific information, namely, group cohomology, about a particular group, namely: alternating group:A6.
View group cohomology of particular groups | View other specific information about alternating group:A6
|Family name||Parameter values||General discussion of group cohomology of family|
|alternating group||6||group cohomology of alternating groups|
|projective special linear group of degree two over a finite field of size||, i.e., field:F9, i.e., field of nine elements, so the group is||group cohomology of projective special linear group of degree two over a finite field|
Computation of homology groups
The homology groups for trivial group action on the integers can be computed using the Hap package (if the package is installed but not automatically loaded, load it using LoadPackage("hap");), specifically its GroupHomology function. The function returns a list of numbers which are the orders of cyclic groups whose external direct product is the desired homology group.
First homology group
The first homology group, which is also the abelianization, can be computed as follows:
gap> GroupHomology(AlternatingGroup(6),1); [ ]
This says that .
Second homology group
The second homology group, which is also the Schur multiplier, can be computed as follows:
gap> GroupHomology(AlternatingGroup(6),2); [ 2, 3 ]
This says that .
First few homology groups
gap> List([1..10],i -> [i,GroupHomology(AlternatingGroup(6),i)]); [ [ 1, [ ] ], [ 2, [ 2, 3 ] ], [ 3, [ 4, 3, 5 ] ], [ 4, [ ] ], [ 5, [ 2, 2 ] ], [ 6, [ 2, 3 ] ], [ 7, [ 4, 3, 3, 3, 5 ] ], [ 8, [ 2, 2 ] ], [ 9, [ 2, 2 ] ], [ 10, [ 2, 3, 3, 3 ] ] ]