Step
*
1
2
1
of Lemma
fact-greater-exp
1. k : ℕ+
2. m : ℤ
3. 0 < m
4. ((k - 1)! * k^(m - 1) * ((m - 1) + k)) ≤ ((m - 1) + k)!
5. ((m + k) * (k - 1)! * k^(m - 1) * ((m - 1) + k)) ≤ ((m + k) * ((m - 1) + k)!)
⊢ ((k - 1)! * k^m * (m + k)) ≤ ((m + k) * ((m + k) - 1)!)
BY
{ xxx(Subst' (m - 1) + k ~ (m + k) - 1 -1 THEN Auto)xxx }
1
1. k : ℕ+
2. m : ℤ
3. 0 < m
4. ((k - 1)! * k^(m - 1) * ((m - 1) + k)) ≤ ((m - 1) + k)!
5. ((m + k) * (k - 1)! * k^(m - 1) * ((m + k) - 1)) ≤ ((m + k) * ((m + k) - 1)!)
⊢ ((k - 1)! * k^m * (m + k)) ≤ ((m + k) * ((m + k) - 1)!)
Latex:
Latex:
1. k : \mBbbN{}\msupplus{}
2. m : \mBbbZ{}
3. 0 < m
4. ((k - 1)! * k\^{}(m - 1) * ((m - 1) + k)) \mleq{} ((m - 1) + k)!
5. ((m + k) * (k - 1)! * k\^{}(m - 1) * ((m - 1) + k)) \mleq{} ((m + k) * ((m - 1) + k)!)
\mvdash{} ((k - 1)! * k\^{}m * (m + k)) \mleq{} ((m + k) * ((m + k) - 1)!)
By
Latex:
xxx(Subst' (m - 1) + k \msim{} (m + k) - 1 -1 THEN Auto)xxx
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