Step
*
1
1
1
1
of Lemma
square-between-lemma1
.....assertion.....
1. n : ℕ+
2. k : ℕn - 1
3. a : ℕ
4. (a * a) ≤ ((4 * n) * k)
5. (4 * n) * k < (a + 1) * (a + 1)
6. (k/n) ≤ ((a + 1/2 * n) * (a + 1/2 * n))
⊢ (2 * a) + 1 < 4 * n
BY
{ Subst' ((a + 1) * (a + 1)) = ((a * a) + (2 * a) + 1) ∈ ℤ -1 }
1
1. n : ℕ+
2. k : ℕn - 1
3. a : ℕ
4. (a * a) ≤ ((4 * n) * k)
5. (4 * n) * k < (a + 1) * (a + 1)
6. (k/n) ≤ ((a + 1/2 * n) * (a + 1/2 * n))
⊢ (2 * a) + 1 < 4 * n
Latex:
Latex:
.....assertion.....
1. n : \mBbbN{}\msupplus{}
2. k : \mBbbN{}n - 1
3. a : \mBbbN{}
4. (a * a) \mleq{} ((4 * n) * k)
5. (4 * n) * k < (a + 1) * (a + 1)
6. (k/n) \mleq{} ((a + 1/2 * n) * (a + 1/2 * n))
\mvdash{} (2 * a) + 1 < 4 * n
By
Latex:
Subst' ((a + 1) * (a + 1)) = ((a * a) + (2 * a) + 1) -1
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