Matrix t*K(1) in Subspace 115 with Dimension 4

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

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