Step
*
of Lemma
less-iff-positive
∀[x,y:ℤ]. uiff(x < y;0 < y - x)
BY
{ TACTIC:((UnivCD THENM RepeatFor 2 (D 0)) THENA Auto) }
1
1. x : ℤ
2. y : ℤ
3. x < y
⊢ 0 < y - x
2
1. x : ℤ
2. y : ℤ
3. 0 < y - x
⊢ x < y
Latex:
Latex:
\mforall{}[x,y:\mBbbZ{}]. uiff(x < y;0 < y - x)
By
Latex:
TACTIC:((UnivCD THENM RepeatFor 2 (D 0)) THENA Auto)
Home
Index