---

Step * of Lemma assert-f-proper-subset-dec

∀[T:Type]. ∀[eq:EqDecider(T)]. ∀[xs,ys:fset(T)].  uiff(↑f-proper-subset-dec(eq;xs;ys);xs ⊆≠ ys)
BY
{ (((UnivCD THENA Auto) THEN Unfolds ``f-proper-subset-dec f-proper-subset`` 0) THEN RW assert_pushdownC 0 THEN Auto) }

---

Latex:

---

Latex:
\mforall{}[T:Type].  \mforall{}[eq:EqDecider(T)].  \mforall{}[xs,ys:fset(T)].    uiff(\muparrow{}f-proper-subset-dec(eq;xs;ys);xs  \msubseteq{}\mneq{}  ys)


By

---

Latex:
(((UnivCD  THENA  Auto)  THEN  Unfolds  ``f-proper-subset-dec  f-proper-subset``  0)
  THEN  RW  assert\_pushdownC  0
  THEN  Auto)

---

Home Index