---

Step * of Lemma isEven-add

∀[n,m:ℤ].  uiff(↑isEven(n + m);↑same-parity(n;m))
BY
{ (RepeatFor 2 ((D 0 THENA Auto)) THEN InstLemma `isOdd-isEven-add` [⌜n⌝;⌜m⌝]⋅ THEN Auto) }

---

Latex:

---

Latex:
\mforall{}[n,m:\mBbbZ{}].    uiff(\muparrow{}isEven(n  +  m);\muparrow{}same-parity(n;m))


By

---

Latex:
(RepeatFor  2  ((D  0  THENA  Auto))  THEN  InstLemma  `isOdd-isEven-add`  [\mkleeneopen{}n\mkleeneclose{};\mkleeneopen{}m\mkleeneclose{}]\mcdot{}  THEN  Auto)

---

Home Index