---

Step * of Lemma l_disjoint_singleton2

∀[T:Type]. ∀[a:T List]. ∀[x:T].  uiff(l_disjoint(T;[x];a);¬(x ∈ a))
BY
{ (InstLemma `l_disjoint_singleton` []
   THEN RepeatFor 3 (ParallelLast)
   THEN RWO "l_disjoint-symmetry" 0
   THEN Try (Trivial)
   THEN Auto) }

---

Latex:

---

Latex:
\mforall{}[T:Type].  \mforall{}[a:T  List].  \mforall{}[x:T].    uiff(l\_disjoint(T;[x];a);\mneg{}(x  \mmember{}  a))


By

---

Latex:
(InstLemma  `l\_disjoint\_singleton`  []
  THEN  RepeatFor  3  (ParallelLast)
  THEN  RWO  "l\_disjoint-symmetry"  0
  THEN  Try  (Trivial)
  THEN  Auto)

---

Home Index