def oneex_twoex():
    A = (Uedg(f, t1) * Ugde(a, t1))
    print(evaluate_cumulant(A, positive_times=(t1,), leading_index=a, arrays='gg'))
def oneex_twoex():
    A = (Uedg(f, t1) * Ugde(a, t1))
    print(evaluate_cumulant(A, positive_times=(t1,), leading_index=a, arrays='gg'))