---

Step * 1 of Lemma equal-nat-inf-infinity


1. x : ℕ∞
2. x = ∞ ∈ ℕ∞
3. i : ℕ
⊢ ¬(x = i∞ ∈ ℕ∞)
BY
{ (HypSubst' 2 0 THEN Auto) }

---

Latex:

---

Latex:

1.  x  :  \mBbbN{}\minfty{}
2.  x  =  \minfty{}
3.  i  :  \mBbbN{}
\mvdash{}  \mneg{}(x  =  i\minfty{})


By

---

Latex:
(HypSubst'  2  0  THEN  Auto)

---

Home Index