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Description: Lemma for cxpaddle . (Contributed by Mario Carneiro, 2-Aug-2014)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | cxpaddlelem.1 | ⊢ ( 𝜑 → 𝐴 ∈ ℝ ) | |
| cxpaddlelem.2 | ⊢ ( 𝜑 → 0 ≤ 𝐴 ) | ||
| cxpaddlelem.3 | ⊢ ( 𝜑 → 𝐴 ≤ 1 ) | ||
| cxpaddlelem.4 | ⊢ ( 𝜑 → 𝐵 ∈ ℝ+ ) | ||
| cxpaddlelem.5 | ⊢ ( 𝜑 → 𝐵 ≤ 1 ) | ||
| Assertion | cxpaddlelem | ⊢ ( 𝜑 → 𝐴 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cxpaddlelem.1 | ⊢ ( 𝜑 → 𝐴 ∈ ℝ ) | |
| 2 | cxpaddlelem.2 | ⊢ ( 𝜑 → 0 ≤ 𝐴 ) | |
| 3 | cxpaddlelem.3 | ⊢ ( 𝜑 → 𝐴 ≤ 1 ) | |
| 4 | cxpaddlelem.4 | ⊢ ( 𝜑 → 𝐵 ∈ ℝ+ ) | |
| 5 | cxpaddlelem.5 | ⊢ ( 𝜑 → 𝐵 ≤ 1 ) | |
| 6 | 1re | ⊢ 1 ∈ ℝ | |
| 7 | 4 | rpred | ⊢ ( 𝜑 → 𝐵 ∈ ℝ ) |
| 8 | resubcl | ⊢ ( ( 1 ∈ ℝ ∧ 𝐵 ∈ ℝ ) → ( 1 − 𝐵 ) ∈ ℝ ) | |
| 9 | 6 7 8 | sylancr | ⊢ ( 𝜑 → ( 1 − 𝐵 ) ∈ ℝ ) |
| 10 | 1 2 9 | recxpcld | ⊢ ( 𝜑 → ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ∈ ℝ ) |
| 11 | 10 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ∈ ℝ ) |
| 12 | 1red | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → 1 ∈ ℝ ) | |
| 13 | recxpcl | ⊢ ( ( 𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ 𝐵 ∈ ℝ ) → ( 𝐴 ↑𝑐 𝐵 ) ∈ ℝ ) | |
| 14 | cxpge0 | ⊢ ( ( 𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ 𝐵 ∈ ℝ ) → 0 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) | |
| 15 | 13 14 | jca | ⊢ ( ( 𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ 𝐵 ∈ ℝ ) → ( ( 𝐴 ↑𝑐 𝐵 ) ∈ ℝ ∧ 0 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) ) |
| 16 | 1 2 7 15 | syl3anc | ⊢ ( 𝜑 → ( ( 𝐴 ↑𝑐 𝐵 ) ∈ ℝ ∧ 0 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) ) |
| 17 | 16 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( ( 𝐴 ↑𝑐 𝐵 ) ∈ ℝ ∧ 0 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) ) |
| 18 | 3 | ad2antrr | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → 𝐴 ≤ 1 ) |
| 19 | 1 | ad2antrr | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → 𝐴 ∈ ℝ ) |
| 20 | 2 | ad2antrr | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → 0 ≤ 𝐴 ) |
| 21 | 1red | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → 1 ∈ ℝ ) | |
| 22 | 0le1 | ⊢ 0 ≤ 1 | |
| 23 | 22 | a1i | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → 0 ≤ 1 ) |
| 24 | difrp | ⊢ ( ( 𝐵 ∈ ℝ ∧ 1 ∈ ℝ ) → ( 𝐵 < 1 ↔ ( 1 − 𝐵 ) ∈ ℝ+ ) ) | |
| 25 | 7 6 24 | sylancl | ⊢ ( 𝜑 → ( 𝐵 < 1 ↔ ( 1 − 𝐵 ) ∈ ℝ+ ) ) |
| 26 | 25 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 𝐵 < 1 ↔ ( 1 − 𝐵 ) ∈ ℝ+ ) ) |
| 27 | 26 | biimpa | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → ( 1 − 𝐵 ) ∈ ℝ+ ) |
| 28 | 19 20 21 23 27 | cxple2d | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → ( 𝐴 ≤ 1 ↔ ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ≤ ( 1 ↑𝑐 ( 1 − 𝐵 ) ) ) ) |
| 29 | 18 28 | mpbid | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ≤ ( 1 ↑𝑐 ( 1 − 𝐵 ) ) ) |
| 30 | 9 | recnd | ⊢ ( 𝜑 → ( 1 − 𝐵 ) ∈ ℂ ) |
| 31 | 30 | 1cxpd | ⊢ ( 𝜑 → ( 1 ↑𝑐 ( 1 − 𝐵 ) ) = 1 ) |
| 32 | 31 | ad2antrr | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → ( 1 ↑𝑐 ( 1 − 𝐵 ) ) = 1 ) |
| 33 | 29 32 | breqtrd | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 < 1 ) → ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ≤ 1 ) |
| 34 | simpr | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 = 1 ) → 𝐵 = 1 ) | |
| 35 | 34 | oveq2d | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 = 1 ) → ( 1 − 𝐵 ) = ( 1 − 1 ) ) |
| 36 | 1m1e0 | ⊢ ( 1 − 1 ) = 0 | |
| 37 | 35 36 | eqtrdi | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 = 1 ) → ( 1 − 𝐵 ) = 0 ) |
| 38 | 37 | oveq2d | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 = 1 ) → ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) = ( 𝐴 ↑𝑐 0 ) ) |
| 39 | 1 | recnd | ⊢ ( 𝜑 → 𝐴 ∈ ℂ ) |
| 40 | 39 | ad2antrr | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 = 1 ) → 𝐴 ∈ ℂ ) |
| 41 | 40 | cxp0d | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 = 1 ) → ( 𝐴 ↑𝑐 0 ) = 1 ) |
| 42 | 38 41 | eqtrd | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 = 1 ) → ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) = 1 ) |
| 43 | 1le1 | ⊢ 1 ≤ 1 | |
| 44 | 42 43 | eqbrtrdi | ⊢ ( ( ( 𝜑 ∧ 0 < 𝐴 ) ∧ 𝐵 = 1 ) → ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ≤ 1 ) |
| 45 | leloe | ⊢ ( ( 𝐵 ∈ ℝ ∧ 1 ∈ ℝ ) → ( 𝐵 ≤ 1 ↔ ( 𝐵 < 1 ∨ 𝐵 = 1 ) ) ) | |
| 46 | 7 6 45 | sylancl | ⊢ ( 𝜑 → ( 𝐵 ≤ 1 ↔ ( 𝐵 < 1 ∨ 𝐵 = 1 ) ) ) |
| 47 | 5 46 | mpbid | ⊢ ( 𝜑 → ( 𝐵 < 1 ∨ 𝐵 = 1 ) ) |
| 48 | 47 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 𝐵 < 1 ∨ 𝐵 = 1 ) ) |
| 49 | 33 44 48 | mpjaodan | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ≤ 1 ) |
| 50 | lemul1a | ⊢ ( ( ( ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ∈ ℝ ∧ 1 ∈ ℝ ∧ ( ( 𝐴 ↑𝑐 𝐵 ) ∈ ℝ ∧ 0 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) ) ∧ ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) ≤ 1 ) → ( ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) · ( 𝐴 ↑𝑐 𝐵 ) ) ≤ ( 1 · ( 𝐴 ↑𝑐 𝐵 ) ) ) | |
| 51 | 11 12 17 49 50 | syl31anc | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) · ( 𝐴 ↑𝑐 𝐵 ) ) ≤ ( 1 · ( 𝐴 ↑𝑐 𝐵 ) ) ) |
| 52 | ax-1cn | ⊢ 1 ∈ ℂ | |
| 53 | 7 | recnd | ⊢ ( 𝜑 → 𝐵 ∈ ℂ ) |
| 54 | npcan | ⊢ ( ( 1 ∈ ℂ ∧ 𝐵 ∈ ℂ ) → ( ( 1 − 𝐵 ) + 𝐵 ) = 1 ) | |
| 55 | 52 53 54 | sylancr | ⊢ ( 𝜑 → ( ( 1 − 𝐵 ) + 𝐵 ) = 1 ) |
| 56 | 55 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( ( 1 − 𝐵 ) + 𝐵 ) = 1 ) |
| 57 | 56 | oveq2d | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 𝐴 ↑𝑐 ( ( 1 − 𝐵 ) + 𝐵 ) ) = ( 𝐴 ↑𝑐 1 ) ) |
| 58 | 39 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → 𝐴 ∈ ℂ ) |
| 59 | 1 | anim1i | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 𝐴 ∈ ℝ ∧ 0 < 𝐴 ) ) |
| 60 | elrp | ⊢ ( 𝐴 ∈ ℝ+ ↔ ( 𝐴 ∈ ℝ ∧ 0 < 𝐴 ) ) | |
| 61 | 59 60 | sylibr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → 𝐴 ∈ ℝ+ ) |
| 62 | 61 | rpne0d | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → 𝐴 ≠ 0 ) |
| 63 | 30 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 1 − 𝐵 ) ∈ ℂ ) |
| 64 | 53 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → 𝐵 ∈ ℂ ) |
| 65 | 58 62 63 64 | cxpaddd | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 𝐴 ↑𝑐 ( ( 1 − 𝐵 ) + 𝐵 ) ) = ( ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) · ( 𝐴 ↑𝑐 𝐵 ) ) ) |
| 66 | 39 | cxp1d | ⊢ ( 𝜑 → ( 𝐴 ↑𝑐 1 ) = 𝐴 ) |
| 67 | 66 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 𝐴 ↑𝑐 1 ) = 𝐴 ) |
| 68 | 57 65 67 | 3eqtr3d | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( ( 𝐴 ↑𝑐 ( 1 − 𝐵 ) ) · ( 𝐴 ↑𝑐 𝐵 ) ) = 𝐴 ) |
| 69 | 39 53 | cxpcld | ⊢ ( 𝜑 → ( 𝐴 ↑𝑐 𝐵 ) ∈ ℂ ) |
| 70 | 69 | mullidd | ⊢ ( 𝜑 → ( 1 · ( 𝐴 ↑𝑐 𝐵 ) ) = ( 𝐴 ↑𝑐 𝐵 ) ) |
| 71 | 70 | adantr | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → ( 1 · ( 𝐴 ↑𝑐 𝐵 ) ) = ( 𝐴 ↑𝑐 𝐵 ) ) |
| 72 | 51 68 71 | 3brtr3d | ⊢ ( ( 𝜑 ∧ 0 < 𝐴 ) → 𝐴 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) |
| 73 | 1 2 7 | cxpge0d | ⊢ ( 𝜑 → 0 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) |
| 74 | breq1 | ⊢ ( 0 = 𝐴 → ( 0 ≤ ( 𝐴 ↑𝑐 𝐵 ) ↔ 𝐴 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) ) | |
| 75 | 73 74 | syl5ibcom | ⊢ ( 𝜑 → ( 0 = 𝐴 → 𝐴 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) ) |
| 76 | 75 | imp | ⊢ ( ( 𝜑 ∧ 0 = 𝐴 ) → 𝐴 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) |
| 77 | 0re | ⊢ 0 ∈ ℝ | |
| 78 | leloe | ⊢ ( ( 0 ∈ ℝ ∧ 𝐴 ∈ ℝ ) → ( 0 ≤ 𝐴 ↔ ( 0 < 𝐴 ∨ 0 = 𝐴 ) ) ) | |
| 79 | 77 1 78 | sylancr | ⊢ ( 𝜑 → ( 0 ≤ 𝐴 ↔ ( 0 < 𝐴 ∨ 0 = 𝐴 ) ) ) |
| 80 | 2 79 | mpbid | ⊢ ( 𝜑 → ( 0 < 𝐴 ∨ 0 = 𝐴 ) ) |
| 81 | 72 76 80 | mpjaodan | ⊢ ( 𝜑 → 𝐴 ≤ ( 𝐴 ↑𝑐 𝐵 ) ) |