Apply CD_mul_0R with
Sing 2,
SNo,
minus_SNo,
λ x0 . x0,
add_SNo,
mul_SNo leaving 7 subgoals.
The subproof is completed by applying complex_tag_fresh.
The subproof is completed by applying SNo_0.
The subproof is completed by applying minus_SNo_0.
Let x0 of type ι → ι → ο be given.
Assume H0: x0 0 0.
The subproof is completed by applying H0.
Apply add_SNo_0L with
0.
The subproof is completed by applying SNo_0.
The subproof is completed by applying mul_SNo_zeroL.
The subproof is completed by applying mul_SNo_zeroR.