73.99 CompositeDerivation

CompositeDerivation( chi, chj )

This function applies the Whitehead product to two derivations and returns the composite. In the example, derivations chi4, chi8 correspond to sections xi4 and xi8.

    gap> chi48 := CompositeDerivation( chi4, chi8 );
    XModDerivationByImages( s3, c3, [ (4,5,6), (2,3)(5,6) ], 
       [ (1,2,3)(4,6,5), (1,3,2)(4,5,6) ] )  

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