---

Step * of Lemma retract_wf

∀[T:Type]. ∀[f:Base].  retract(T;f) ∈ ℙ supposing T ⊆r Base
BY
{ (Auto
   THEN Unfold `retract` 0
   THEN RepeatFor 2 (MemCD)
   THEN Try (Complete (Auto))
   THEN BLemma `equal-wf-base`⋅
   THEN Auto) }

---

Latex:

---

Latex:
\mforall{}[T:Type].  \mforall{}[f:Base].    retract(T;f)  \mmember{}  \mBbbP{}  supposing  T  \msubseteq{}r  Base


By

---

Latex:
(Auto
  THEN  Unfold  `retract`  0
  THEN  RepeatFor  2  (MemCD)
  THEN  Try  (Complete  (Auto))
  THEN  BLemma  `equal-wf-base`\mcdot{}
  THEN  Auto)

---

Home Index