73.75 NormalSubCat1s

NormalSubCat1s( C )

This function takes pairs of normal subgroups from the source and range of {cal C} and constructs a normal sub-cat1-group whenever the axioms are satisfied.

    gap> NormalSubCat1s( SC );
    [ cat1-group [Sub[c3^2
|
Xc2 ==> s3]] ,
      cat1-group [Sub[c3^2
|
Xc2 ==> s3]] , 
      cat1-group [Sub[c3^2
|
Xc2 ==> s3]] ,
      cat1-group [Sub[c3^2
|Xc2 ==> s3]] ]

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GAP 3.4.4
April 1997