Step
*
of Lemma
divides_anti_sym
∀a,b:ℤ. ((a | b)
⇒ (b | a)
⇒ a = ± b)
BY
{ Auto }
1
1. a : ℤ
2. b : ℤ
3. a | b
4. b | a
⊢ a = ± b
Latex:
Latex:
\mforall{}a,b:\mBbbZ{}. ((a | b) {}\mRightarrow{} (b | a) {}\mRightarrow{} a = \mpm{} b)
By
Latex:
Auto
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