Let x0 of type ι be given.
Let x1 of type ι be given.
Apply complex_add_CSNo with
x0,
mul_CSNo Complex_i x1 leaving 2 subgoals.
Apply real_complex with
x0.
The subproof is completed by applying H0.
Apply complex_mul_CSNo with
Complex_i,
x1 leaving 2 subgoals.
The subproof is completed by applying complex_i.
Apply real_complex with
x1.
The subproof is completed by applying H1.