TII subcells for the U(2,2) x GL(2,H) block of GL4 # cell#0 , |C| = 1 special orbit = [4] special rep = [4] , dim = 1 cell rep = phi[4] TII depth = 1 TII multiplicity polynomial = X TII subcells: tii[5,1] := {0} cell#1 , |C| = 2 special orbit = [2, 2] special rep = [2, 2] , dim = 2 cell rep = phi[2,2] TII depth = 1 TII multiplicity polynomial = 2*X TII subcells: tii[3,1] := {0} tii[3,2] := {1}