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Description: Lemma for bpos . (Contributed by Mario Carneiro, 13-Mar-2014)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | bpos.1 | ⊢ ( 𝜑 → 𝑁 ∈ ( ℤ≥ ‘ 5 ) ) | |
| bpos.2 | ⊢ ( 𝜑 → ¬ ∃ 𝑝 ∈ ℙ ( 𝑁 < 𝑝 ∧ 𝑝 ≤ ( 2 · 𝑁 ) ) ) | ||
| bpos.3 | ⊢ 𝐹 = ( 𝑛 ∈ ℕ ↦ if ( 𝑛 ∈ ℙ , ( 𝑛 ↑ ( 𝑛 pCnt ( ( 2 · 𝑁 ) C 𝑁 ) ) ) , 1 ) ) | ||
| bpos.4 | ⊢ 𝐾 = ( ⌊ ‘ ( ( 2 · 𝑁 ) / 3 ) ) | ||
| bpos.5 | ⊢ 𝑀 = ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) | ||
| Assertion | bposlem4 | ⊢ ( 𝜑 → 𝑀 ∈ ( 3 ... 𝐾 ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bpos.1 | ⊢ ( 𝜑 → 𝑁 ∈ ( ℤ≥ ‘ 5 ) ) | |
| 2 | bpos.2 | ⊢ ( 𝜑 → ¬ ∃ 𝑝 ∈ ℙ ( 𝑁 < 𝑝 ∧ 𝑝 ≤ ( 2 · 𝑁 ) ) ) | |
| 3 | bpos.3 | ⊢ 𝐹 = ( 𝑛 ∈ ℕ ↦ if ( 𝑛 ∈ ℙ , ( 𝑛 ↑ ( 𝑛 pCnt ( ( 2 · 𝑁 ) C 𝑁 ) ) ) , 1 ) ) | |
| 4 | bpos.4 | ⊢ 𝐾 = ( ⌊ ‘ ( ( 2 · 𝑁 ) / 3 ) ) | |
| 5 | bpos.5 | ⊢ 𝑀 = ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) | |
| 6 | 2nn | ⊢ 2 ∈ ℕ | |
| 7 | 5nn | ⊢ 5 ∈ ℕ | |
| 8 | eluznn | ⊢ ( ( 5 ∈ ℕ ∧ 𝑁 ∈ ( ℤ≥ ‘ 5 ) ) → 𝑁 ∈ ℕ ) | |
| 9 | 7 1 8 | sylancr | ⊢ ( 𝜑 → 𝑁 ∈ ℕ ) |
| 10 | nnmulcl | ⊢ ( ( 2 ∈ ℕ ∧ 𝑁 ∈ ℕ ) → ( 2 · 𝑁 ) ∈ ℕ ) | |
| 11 | 6 9 10 | sylancr | ⊢ ( 𝜑 → ( 2 · 𝑁 ) ∈ ℕ ) |
| 12 | 11 | nnred | ⊢ ( 𝜑 → ( 2 · 𝑁 ) ∈ ℝ ) |
| 13 | 11 | nnrpd | ⊢ ( 𝜑 → ( 2 · 𝑁 ) ∈ ℝ+ ) |
| 14 | 13 | rpge0d | ⊢ ( 𝜑 → 0 ≤ ( 2 · 𝑁 ) ) |
| 15 | 12 14 | resqrtcld | ⊢ ( 𝜑 → ( √ ‘ ( 2 · 𝑁 ) ) ∈ ℝ ) |
| 16 | 15 | flcld | ⊢ ( 𝜑 → ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ∈ ℤ ) |
| 17 | sqrt9 | ⊢ ( √ ‘ 9 ) = 3 | |
| 18 | 9re | ⊢ 9 ∈ ℝ | |
| 19 | 18 | a1i | ⊢ ( 𝜑 → 9 ∈ ℝ ) |
| 20 | 10re | ⊢ ; 1 0 ∈ ℝ | |
| 21 | 20 | a1i | ⊢ ( 𝜑 → ; 1 0 ∈ ℝ ) |
| 22 | lep1 | ⊢ ( 9 ∈ ℝ → 9 ≤ ( 9 + 1 ) ) | |
| 23 | 18 22 | ax-mp | ⊢ 9 ≤ ( 9 + 1 ) |
| 24 | 9p1e10 | ⊢ ( 9 + 1 ) = ; 1 0 | |
| 25 | 23 24 | breqtri | ⊢ 9 ≤ ; 1 0 |
| 26 | 25 | a1i | ⊢ ( 𝜑 → 9 ≤ ; 1 0 ) |
| 27 | 5cn | ⊢ 5 ∈ ℂ | |
| 28 | 2cn | ⊢ 2 ∈ ℂ | |
| 29 | 5t2e10 | ⊢ ( 5 · 2 ) = ; 1 0 | |
| 30 | 27 28 29 | mulcomli | ⊢ ( 2 · 5 ) = ; 1 0 |
| 31 | eluzle | ⊢ ( 𝑁 ∈ ( ℤ≥ ‘ 5 ) → 5 ≤ 𝑁 ) | |
| 32 | 1 31 | syl | ⊢ ( 𝜑 → 5 ≤ 𝑁 ) |
| 33 | 9 | nnred | ⊢ ( 𝜑 → 𝑁 ∈ ℝ ) |
| 34 | 5re | ⊢ 5 ∈ ℝ | |
| 35 | 2re | ⊢ 2 ∈ ℝ | |
| 36 | 2pos | ⊢ 0 < 2 | |
| 37 | 35 36 | pm3.2i | ⊢ ( 2 ∈ ℝ ∧ 0 < 2 ) |
| 38 | lemul2 | ⊢ ( ( 5 ∈ ℝ ∧ 𝑁 ∈ ℝ ∧ ( 2 ∈ ℝ ∧ 0 < 2 ) ) → ( 5 ≤ 𝑁 ↔ ( 2 · 5 ) ≤ ( 2 · 𝑁 ) ) ) | |
| 39 | 34 37 38 | mp3an13 | ⊢ ( 𝑁 ∈ ℝ → ( 5 ≤ 𝑁 ↔ ( 2 · 5 ) ≤ ( 2 · 𝑁 ) ) ) |
| 40 | 33 39 | syl | ⊢ ( 𝜑 → ( 5 ≤ 𝑁 ↔ ( 2 · 5 ) ≤ ( 2 · 𝑁 ) ) ) |
| 41 | 32 40 | mpbid | ⊢ ( 𝜑 → ( 2 · 5 ) ≤ ( 2 · 𝑁 ) ) |
| 42 | 30 41 | eqbrtrrid | ⊢ ( 𝜑 → ; 1 0 ≤ ( 2 · 𝑁 ) ) |
| 43 | 19 21 12 26 42 | letrd | ⊢ ( 𝜑 → 9 ≤ ( 2 · 𝑁 ) ) |
| 44 | 0re | ⊢ 0 ∈ ℝ | |
| 45 | 9pos | ⊢ 0 < 9 | |
| 46 | 44 18 45 | ltleii | ⊢ 0 ≤ 9 |
| 47 | 18 46 | pm3.2i | ⊢ ( 9 ∈ ℝ ∧ 0 ≤ 9 ) |
| 48 | 13 | rprege0d | ⊢ ( 𝜑 → ( ( 2 · 𝑁 ) ∈ ℝ ∧ 0 ≤ ( 2 · 𝑁 ) ) ) |
| 49 | sqrtle | ⊢ ( ( ( 9 ∈ ℝ ∧ 0 ≤ 9 ) ∧ ( ( 2 · 𝑁 ) ∈ ℝ ∧ 0 ≤ ( 2 · 𝑁 ) ) ) → ( 9 ≤ ( 2 · 𝑁 ) ↔ ( √ ‘ 9 ) ≤ ( √ ‘ ( 2 · 𝑁 ) ) ) ) | |
| 50 | 47 48 49 | sylancr | ⊢ ( 𝜑 → ( 9 ≤ ( 2 · 𝑁 ) ↔ ( √ ‘ 9 ) ≤ ( √ ‘ ( 2 · 𝑁 ) ) ) ) |
| 51 | 43 50 | mpbid | ⊢ ( 𝜑 → ( √ ‘ 9 ) ≤ ( √ ‘ ( 2 · 𝑁 ) ) ) |
| 52 | 17 51 | eqbrtrrid | ⊢ ( 𝜑 → 3 ≤ ( √ ‘ ( 2 · 𝑁 ) ) ) |
| 53 | 3z | ⊢ 3 ∈ ℤ | |
| 54 | flge | ⊢ ( ( ( √ ‘ ( 2 · 𝑁 ) ) ∈ ℝ ∧ 3 ∈ ℤ ) → ( 3 ≤ ( √ ‘ ( 2 · 𝑁 ) ) ↔ 3 ≤ ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ) ) | |
| 55 | 15 53 54 | sylancl | ⊢ ( 𝜑 → ( 3 ≤ ( √ ‘ ( 2 · 𝑁 ) ) ↔ 3 ≤ ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ) ) |
| 56 | 52 55 | mpbid | ⊢ ( 𝜑 → 3 ≤ ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ) |
| 57 | 53 | eluz1i | ⊢ ( ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ∈ ( ℤ≥ ‘ 3 ) ↔ ( ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ∈ ℤ ∧ 3 ≤ ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ) ) |
| 58 | 16 56 57 | sylanbrc | ⊢ ( 𝜑 → ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ∈ ( ℤ≥ ‘ 3 ) ) |
| 59 | 3nn | ⊢ 3 ∈ ℕ | |
| 60 | nndivre | ⊢ ( ( ( 2 · 𝑁 ) ∈ ℝ ∧ 3 ∈ ℕ ) → ( ( 2 · 𝑁 ) / 3 ) ∈ ℝ ) | |
| 61 | 12 59 60 | sylancl | ⊢ ( 𝜑 → ( ( 2 · 𝑁 ) / 3 ) ∈ ℝ ) |
| 62 | 3re | ⊢ 3 ∈ ℝ | |
| 63 | 62 | a1i | ⊢ ( 𝜑 → 3 ∈ ℝ ) |
| 64 | 13 | sqrtgt0d | ⊢ ( 𝜑 → 0 < ( √ ‘ ( 2 · 𝑁 ) ) ) |
| 65 | lemul2 | ⊢ ( ( 3 ∈ ℝ ∧ ( √ ‘ ( 2 · 𝑁 ) ) ∈ ℝ ∧ ( ( √ ‘ ( 2 · 𝑁 ) ) ∈ ℝ ∧ 0 < ( √ ‘ ( 2 · 𝑁 ) ) ) ) → ( 3 ≤ ( √ ‘ ( 2 · 𝑁 ) ) ↔ ( ( √ ‘ ( 2 · 𝑁 ) ) · 3 ) ≤ ( ( √ ‘ ( 2 · 𝑁 ) ) · ( √ ‘ ( 2 · 𝑁 ) ) ) ) ) | |
| 66 | 63 15 15 64 65 | syl112anc | ⊢ ( 𝜑 → ( 3 ≤ ( √ ‘ ( 2 · 𝑁 ) ) ↔ ( ( √ ‘ ( 2 · 𝑁 ) ) · 3 ) ≤ ( ( √ ‘ ( 2 · 𝑁 ) ) · ( √ ‘ ( 2 · 𝑁 ) ) ) ) ) |
| 67 | 52 66 | mpbid | ⊢ ( 𝜑 → ( ( √ ‘ ( 2 · 𝑁 ) ) · 3 ) ≤ ( ( √ ‘ ( 2 · 𝑁 ) ) · ( √ ‘ ( 2 · 𝑁 ) ) ) ) |
| 68 | remsqsqrt | ⊢ ( ( ( 2 · 𝑁 ) ∈ ℝ ∧ 0 ≤ ( 2 · 𝑁 ) ) → ( ( √ ‘ ( 2 · 𝑁 ) ) · ( √ ‘ ( 2 · 𝑁 ) ) ) = ( 2 · 𝑁 ) ) | |
| 69 | 12 14 68 | syl2anc | ⊢ ( 𝜑 → ( ( √ ‘ ( 2 · 𝑁 ) ) · ( √ ‘ ( 2 · 𝑁 ) ) ) = ( 2 · 𝑁 ) ) |
| 70 | 67 69 | breqtrd | ⊢ ( 𝜑 → ( ( √ ‘ ( 2 · 𝑁 ) ) · 3 ) ≤ ( 2 · 𝑁 ) ) |
| 71 | 3pos | ⊢ 0 < 3 | |
| 72 | 62 71 | pm3.2i | ⊢ ( 3 ∈ ℝ ∧ 0 < 3 ) |
| 73 | 72 | a1i | ⊢ ( 𝜑 → ( 3 ∈ ℝ ∧ 0 < 3 ) ) |
| 74 | lemuldiv | ⊢ ( ( ( √ ‘ ( 2 · 𝑁 ) ) ∈ ℝ ∧ ( 2 · 𝑁 ) ∈ ℝ ∧ ( 3 ∈ ℝ ∧ 0 < 3 ) ) → ( ( ( √ ‘ ( 2 · 𝑁 ) ) · 3 ) ≤ ( 2 · 𝑁 ) ↔ ( √ ‘ ( 2 · 𝑁 ) ) ≤ ( ( 2 · 𝑁 ) / 3 ) ) ) | |
| 75 | 15 12 73 74 | syl3anc | ⊢ ( 𝜑 → ( ( ( √ ‘ ( 2 · 𝑁 ) ) · 3 ) ≤ ( 2 · 𝑁 ) ↔ ( √ ‘ ( 2 · 𝑁 ) ) ≤ ( ( 2 · 𝑁 ) / 3 ) ) ) |
| 76 | 70 75 | mpbid | ⊢ ( 𝜑 → ( √ ‘ ( 2 · 𝑁 ) ) ≤ ( ( 2 · 𝑁 ) / 3 ) ) |
| 77 | flword2 | ⊢ ( ( ( √ ‘ ( 2 · 𝑁 ) ) ∈ ℝ ∧ ( ( 2 · 𝑁 ) / 3 ) ∈ ℝ ∧ ( √ ‘ ( 2 · 𝑁 ) ) ≤ ( ( 2 · 𝑁 ) / 3 ) ) → ( ⌊ ‘ ( ( 2 · 𝑁 ) / 3 ) ) ∈ ( ℤ≥ ‘ ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ) ) | |
| 78 | 15 61 76 77 | syl3anc | ⊢ ( 𝜑 → ( ⌊ ‘ ( ( 2 · 𝑁 ) / 3 ) ) ∈ ( ℤ≥ ‘ ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ) ) |
| 79 | elfzuzb | ⊢ ( ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ∈ ( 3 ... ( ⌊ ‘ ( ( 2 · 𝑁 ) / 3 ) ) ) ↔ ( ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ∈ ( ℤ≥ ‘ 3 ) ∧ ( ⌊ ‘ ( ( 2 · 𝑁 ) / 3 ) ) ∈ ( ℤ≥ ‘ ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ) ) ) | |
| 80 | 58 78 79 | sylanbrc | ⊢ ( 𝜑 → ( ⌊ ‘ ( √ ‘ ( 2 · 𝑁 ) ) ) ∈ ( 3 ... ( ⌊ ‘ ( ( 2 · 𝑁 ) / 3 ) ) ) ) |
| 81 | 4 | oveq2i | ⊢ ( 3 ... 𝐾 ) = ( 3 ... ( ⌊ ‘ ( ( 2 · 𝑁 ) / 3 ) ) ) |
| 82 | 80 5 81 | 3eltr4g | ⊢ ( 𝜑 → 𝑀 ∈ ( 3 ... 𝐾 ) ) |