Step
*
1
1
of Lemma
posint_well_fnd
WellFnd{i}(ℕ+;x,y.(x | y) ∧ (¬(y | x)))
BY
{ Assert ∀a,b:ℕ+. {((a | b) ∧ (¬(b | a)))
⇒ a < b}
THENA ((Unfold `guard` 0 THEN UnivCD) THENA Auto) }
1
1. a : ℕ+
2. b : ℕ+
3. (a | b) ∧ (¬(b | a))
⊢ a < b
2
1. ∀a,b:ℕ+. {((a | b) ∧ (¬(b | a)))
⇒ a < b}
⊢ WellFnd{i}(ℕ+;x,y.(x | y) ∧ (¬(y | x)))
Latex:
Latex:
WellFnd\{i\}(\mBbbN{}\msupplus{};x,y.(x | y) \mwedge{} (\mneg{}(y | x)))
By
Latex:
Assert \mforall{}a,b:\mBbbN{}\msupplus{}. \{((a | b) \mwedge{} (\mneg{}(b | a))) {}\mRightarrow{} a < b\}
THENA ((Unfold `guard` 0 THEN UnivCD) THENA Auto)
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