∀[I:fset(ℕ)]. ∀[x:Point(dM(I))]. uiff(↑isdM0(x);x = 0 ∈ Point(dM(I)))
{ Auto }
1. I : fset(ℕ)
2. x : Point(dM(I))
3. ↑isdM0(x)
⊢ x = 0 ∈ Point(dM(I))
3. x = 0 ∈ Point(dM(I))
⊢ ↑isdM0(x)