Let x0 of type ι be given.
Apply complex_E with
x0,
CSNo_Re x0 ∈ real leaving 2 subgoals.
The subproof is completed by applying H0.
Let x1 of type ι be given.
Let x2 of type ι be given.
Apply H3 with
λ x3 x4 . CSNo_Re x4 ∈ real.
Apply complex_Re_eq with
x1,
x2,
λ x3 x4 . x4 ∈ real leaving 3 subgoals.
The subproof is completed by applying H1.
The subproof is completed by applying H2.
The subproof is completed by applying H1.