Step
*
of Lemma
cardinality-le-int_seg
∀[x,y:ℤ]. ∀[n:ℕ]. (y - x) ≤ n supposing |{x..y-}| ≤ n
BY
{ (Auto THEN D -1 THEN Decide x < y THEN Auto') }
1
1. x : ℤ
2. y : ℤ
3. n : ℕ
4. f : ℕn ⟶ {x..y-}
5. Surj(ℕn;{x..y-};f)
6. x < y
⊢ (y - x) ≤ n
Latex:
Latex:
\mforall{}[x,y:\mBbbZ{}]. \mforall{}[n:\mBbbN{}]. (y - x) \mleq{} n supposing |\{x..y\msupminus{}\}| \mleq{} n
By
Latex:
(Auto THEN D -1 THEN Decide x < y THEN Auto')
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