* this is
* L Atree231 = laHm(1,m)*V(2)*la*ga(m)*W(3);
* with normalization <la3th5> = 1

  L   Atree231 =
       + 1/320*gmn1(k2,k2)*e2.e3
       + 1/320*gmn1(k2,e2)*k1.e3
       - 1/320*gmn1(k2,e3)*k1.e2
       + 1/640*gmn1(e2,e3)*ap^-1
       - 1/320*bmnp1(k2,e2,e3)*i_*ap^-1
      ;