---

Step * 2 1 1 2 of Lemma wfd-tree-cases


1. A : Type
2. w : wfd-tree(A)
3. ¬↑co-w-null(w)
4. wfd-subtrees(w) ∈ A ⟶ wfd-tree(A)
5. ¬↑co-w-null(w)
⊢ w = w ∈ wfd-tree(A)
BY
{ Auto }

---

Latex:

---

Latex:

1.  A  :  Type
2.  w  :  wfd-tree(A)
3.  \mneg{}\muparrow{}co-w-null(w)
4.  wfd-subtrees(w)  \mmember{}  A  {}\mrightarrow{}  wfd-tree(A)
5.  \mneg{}\muparrow{}co-w-null(w)
\mvdash{}  w  =  w


By

---

Latex:
Auto

---

Home Index