Matrix t*K(1) in Subspace 166 with Dimension 3

(K(1) is the first-order Grosse operator)

I*Sqrt[3]*t (U + I*Sqrt[3]*U)/2 ((3 + I*Sqrt[3])*t)/Sqrt[2]
(I/2)*(I + Sqrt[3])*U (-I)*Sqrt[3]*t 0
(I*(3*I + Sqrt[3])*t)/Sqrt[2] 0 0