Let x0 of type ι be given.
Let x1 of type ι be given.
Assume H2: x1 = 0 ⟶ ∀ x2 : ο . x2.
Apply mul_div_SNo_R with
x0,
x1,
x1,
λ x2 x3 . x2 = x0 leaving 4 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
The subproof is completed by applying H1.
Apply mul_div_SNo_invL with
x0,
x1 leaving 3 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
The subproof is completed by applying H2.