Step
*
of Lemma
even-implies-two-times
∀n:ℕ. ((↑isEven(n))
⇒ (∃k:ℕ. (n = (2 * k) ∈ ℤ)))
BY
{ (Auto THEN (RWO "assert-isEven" (-1) THENA Auto) THEN ParallelLast THEN Auto') }
Latex:
Latex:
\mforall{}n:\mBbbN{}. ((\muparrow{}isEven(n)) {}\mRightarrow{} (\mexists{}k:\mBbbN{}. (n = (2 * k))))
By
Latex:
(Auto THEN (RWO "assert-isEven" (-1) THENA Auto) THEN ParallelLast THEN Auto')
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