Step
*
1
of Lemma
combinations-formula
.....assertion.....
∀n,m:ℕ. ((n ≤ m)
⇒ ((C(n;m) * (m - n)!) = (m)! ∈ ℤ))
BY
{ ((InductionOnNat THEN (D 0 THENA Auto)) THEN (RWO "combinations-step" 0 THENA Auto) THEN Reduce 0 THEN Auto) }
Latex:
Latex:
.....assertion.....
\mforall{}n,m:\mBbbN{}. ((n \mleq{} m) {}\mRightarrow{} ((C(n;m) * (m - n)!) = (m)!))
By
Latex:
((InductionOnNat THEN (D 0 THENA Auto))
THEN (RWO "combinations-step" 0 THENA Auto)
THEN Reduce 0
THEN Auto)
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