Proof of Theorem 3lexlogpow2ineq2
| Step | Hyp | Ref
| Expression |
| 1 | | tru 1573 |
. 2
⊢
⊤ |
| 2 | | 2re 12321 |
. . . . 5
⊢ 2 ∈
ℝ |
| 3 | 2 | a1i 11 |
. . . 4
⊢ (⊤
→ 2 ∈ ℝ) |
| 4 | | 3re 12327 |
. . . . . . 7
⊢ 3 ∈
ℝ |
| 5 | 4 | a1i 11 |
. . . . . 6
⊢ (⊤
→ 3 ∈ ℝ) |
| 6 | 5 | rehalfcld 12497 |
. . . . 5
⊢ (⊤
→ (3 / 2) ∈ ℝ) |
| 7 | 6 | resqcld 14168 |
. . . 4
⊢ (⊤
→ ((3 / 2)↑2) ∈ ℝ) |
| 8 | | 2pos 12351 |
. . . . . . 7
⊢ 0 <
2 |
| 9 | 8 | a1i 11 |
. . . . . 6
⊢ (⊤
→ 0 < 2) |
| 10 | | 3pos 12355 |
. . . . . . 7
⊢ 0 <
3 |
| 11 | 10 | a1i 11 |
. . . . . 6
⊢ (⊤
→ 0 < 3) |
| 12 | | 1red 11215 |
. . . . . . . 8
⊢ (⊤
→ 1 ∈ ℝ) |
| 13 | | 1lt2 12419 |
. . . . . . . . 9
⊢ 1 <
2 |
| 14 | 13 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ 1 < 2) |
| 15 | 12, 14 | ltned 11352 |
. . . . . . 7
⊢ (⊤
→ 1 ≠ 2) |
| 16 | 15 | necomd 3012 |
. . . . . 6
⊢ (⊤
→ 2 ≠ 1) |
| 17 | 3, 9, 5, 11, 16 | relogbcld 42769 |
. . . . 5
⊢ (⊤
→ (2 logb 3) ∈ ℝ) |
| 18 | 17 | resqcld 14168 |
. . . 4
⊢ (⊤
→ ((2 logb 3)↑2) ∈ ℝ) |
| 19 | | 2cnd 12325 |
. . . . . . . 8
⊢ (⊤
→ 2 ∈ ℂ) |
| 20 | | 4cn 12332 |
. . . . . . . . 9
⊢ 4 ∈
ℂ |
| 21 | 20 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ 4 ∈ ℂ) |
| 22 | | 0red 11217 |
. . . . . . . . . 10
⊢ (⊤
→ 0 ∈ ℝ) |
| 23 | | 4pos 12357 |
. . . . . . . . . . 11
⊢ 0 <
4 |
| 24 | 23 | a1i 11 |
. . . . . . . . . 10
⊢ (⊤
→ 0 < 4) |
| 25 | 22, 24 | ltned 11352 |
. . . . . . . . 9
⊢ (⊤
→ 0 ≠ 4) |
| 26 | 25 | necomd 3012 |
. . . . . . . 8
⊢ (⊤
→ 4 ≠ 0) |
| 27 | 19, 21, 26 | divcan4d 12003 |
. . . . . . 7
⊢ (⊤
→ ((2 · 4) / 4) = 2) |
| 28 | 27 | eqcomd 2768 |
. . . . . 6
⊢ (⊤
→ 2 = ((2 · 4) / 4)) |
| 29 | | 4re 12331 |
. . . . . . . . 9
⊢ 4 ∈
ℝ |
| 30 | 29 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ 4 ∈ ℝ) |
| 31 | 3, 30 | remulcld 11245 |
. . . . . . 7
⊢ (⊤
→ (2 · 4) ∈ ℝ) |
| 32 | | 9re 12346 |
. . . . . . . 8
⊢ 9 ∈
ℝ |
| 33 | 32 | a1i 11 |
. . . . . . 7
⊢ (⊤
→ 9 ∈ ℝ) |
| 34 | 30, 24 | elrpd 13063 |
. . . . . . 7
⊢ (⊤
→ 4 ∈ ℝ+) |
| 35 | | 2t4e8 12416 |
. . . . . . . . 9
⊢ (2
· 4) = 8 |
| 36 | 35 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ (2 · 4) = 8) |
| 37 | | 8lt9 12448 |
. . . . . . . . 9
⊢ 8 <
9 |
| 38 | 37 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ 8 < 9) |
| 39 | 36, 38 | eqbrtrd 5132 |
. . . . . . 7
⊢ (⊤
→ (2 · 4) < 9) |
| 40 | 31, 33, 34, 39 | ltdiv1dd 13123 |
. . . . . 6
⊢ (⊤
→ ((2 · 4) / 4) < (9 / 4)) |
| 41 | 28, 40 | eqbrtrd 5132 |
. . . . 5
⊢ (⊤
→ 2 < (9 / 4)) |
| 42 | | eqid 2762 |
. . . . . . . . . 10
⊢ 9 =
9 |
| 43 | | 3t3e9 12414 |
. . . . . . . . . 10
⊢ (3
· 3) = 9 |
| 44 | 42, 43 | eqtr4i 2788 |
. . . . . . . . 9
⊢ 9 = (3
· 3) |
| 45 | 44 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ 9 = (3 · 3)) |
| 46 | | eqid 2762 |
. . . . . . . . . 10
⊢ 4 =
4 |
| 47 | | 2t2e4 12410 |
. . . . . . . . . 10
⊢ (2
· 2) = 4 |
| 48 | 46, 47 | eqtr4i 2788 |
. . . . . . . . 9
⊢ 4 = (2
· 2) |
| 49 | 48 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ 4 = (2 · 2)) |
| 50 | 45, 49 | oveq12d 7430 |
. . . . . . 7
⊢ (⊤
→ (9 / 4) = ((3 · 3) / (2 · 2))) |
| 51 | 5 | recnd 11243 |
. . . . . . . . 9
⊢ (⊤
→ 3 ∈ ℂ) |
| 52 | 3 | recnd 11243 |
. . . . . . . . 9
⊢ (⊤
→ 2 ∈ ℂ) |
| 53 | 9 | gt0ne0d 11784 |
. . . . . . . . 9
⊢ (⊤
→ 2 ≠ 0) |
| 54 | 51, 52, 51, 52, 53, 53 | divmuldivd 12038 |
. . . . . . . 8
⊢ (⊤
→ ((3 / 2) · (3 / 2)) = ((3 · 3) / (2 ·
2))) |
| 55 | 54 | eqcomd 2768 |
. . . . . . 7
⊢ (⊤
→ ((3 · 3) / (2 · 2)) = ((3 / 2) · (3 /
2))) |
| 56 | 50, 55 | eqtrd 2797 |
. . . . . 6
⊢ (⊤
→ (9 / 4) = ((3 / 2) · (3 / 2))) |
| 57 | 6 | recnd 11243 |
. . . . . . 7
⊢ (⊤
→ (3 / 2) ∈ ℂ) |
| 58 | | sqval 14157 |
. . . . . . . 8
⊢ ((3 / 2)
∈ ℂ → ((3 / 2)↑2) = ((3 / 2) · (3 /
2))) |
| 59 | 58 | eqcomd 2768 |
. . . . . . 7
⊢ ((3 / 2)
∈ ℂ → ((3 / 2) · (3 / 2)) = ((3 /
2)↑2)) |
| 60 | 57, 59 | syl 18 |
. . . . . 6
⊢ (⊤
→ ((3 / 2) · (3 / 2)) = ((3 / 2)↑2)) |
| 61 | 56, 60 | eqtrd 2797 |
. . . . 5
⊢ (⊤
→ (9 / 4) = ((3 / 2)↑2)) |
| 62 | 41, 61 | breqtrd 5136 |
. . . 4
⊢ (⊤
→ 2 < ((3 / 2)↑2)) |
| 63 | | 3lexlogpow2ineq1 42853 |
. . . . . . 7
⊢ ((3 / 2)
< (2 logb 3) ∧ (2 logb 3) < (5 /
3)) |
| 64 | 63 | a1i 11 |
. . . . . 6
⊢ (⊤
→ ((3 / 2) < (2 logb 3) ∧ (2 logb 3) < (5
/ 3))) |
| 65 | 64 | simpld 499 |
. . . . 5
⊢ (⊤
→ (3 / 2) < (2 logb 3)) |
| 66 | | 2nn 12320 |
. . . . . . 7
⊢ 2 ∈
ℕ |
| 67 | 66 | a1i 11 |
. . . . . 6
⊢ (⊤
→ 2 ∈ ℕ) |
| 68 | | 3rp 13028 |
. . . . . . . 8
⊢ 3 ∈
ℝ+ |
| 69 | 68 | a1i 11 |
. . . . . . 7
⊢ (⊤
→ 3 ∈ ℝ+) |
| 70 | 69 | rphalfcld 13078 |
. . . . . 6
⊢ (⊤
→ (3 / 2) ∈ ℝ+) |
| 71 | 5, 3, 11, 9 | divgt0d 12156 |
. . . . . . . 8
⊢ (⊤
→ 0 < (3 / 2)) |
| 72 | 22, 6, 17, 71, 65 | lttrd 11377 |
. . . . . . 7
⊢ (⊤
→ 0 < (2 logb 3)) |
| 73 | 17, 72 | elrpd 13063 |
. . . . . 6
⊢ (⊤
→ (2 logb 3) ∈ ℝ+) |
| 74 | | rpexpmord 14211 |
. . . . . 6
⊢ ((2
∈ ℕ ∧ (3 / 2) ∈ ℝ+ ∧ (2
logb 3) ∈ ℝ+) → ((3 / 2) < (2
logb 3) ↔ ((3 / 2)↑2) < ((2 logb
3)↑2))) |
| 75 | 67, 70, 73, 74 | syl3anc 1397 |
. . . . 5
⊢ (⊤
→ ((3 / 2) < (2 logb 3) ↔ ((3 / 2)↑2) < ((2
logb 3)↑2))) |
| 76 | 65, 75 | mpbid 235 |
. . . 4
⊢ (⊤
→ ((3 / 2)↑2) < ((2 logb 3)↑2)) |
| 77 | 3, 7, 18, 62, 76 | lttrd 11377 |
. . 3
⊢ (⊤
→ 2 < ((2 logb 3)↑2)) |
| 78 | | 5re 12334 |
. . . . . . 7
⊢ 5 ∈
ℝ |
| 79 | 78 | a1i 11 |
. . . . . 6
⊢ (⊤
→ 5 ∈ ℝ) |
| 80 | 22, 11 | gtned 11351 |
. . . . . 6
⊢ (⊤
→ 3 ≠ 0) |
| 81 | 79, 5, 80 | redivcld 12049 |
. . . . 5
⊢ (⊤
→ (5 / 3) ∈ ℝ) |
| 82 | 67 | nnnn0d 12571 |
. . . . 5
⊢ (⊤
→ 2 ∈ ℕ0) |
| 83 | 81, 82 | reexpcld 14206 |
. . . 4
⊢ (⊤
→ ((5 / 3)↑2) ∈ ℝ) |
| 84 | 64 | simprd 500 |
. . . . 5
⊢ (⊤
→ (2 logb 3) < (5 / 3)) |
| 85 | | 5nn 12333 |
. . . . . . . . 9
⊢ 5 ∈
ℕ |
| 86 | 85 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ 5 ∈ ℕ) |
| 87 | 86 | nnrpd 13064 |
. . . . . . 7
⊢ (⊤
→ 5 ∈ ℝ+) |
| 88 | 87, 69 | rpdivcld 13083 |
. . . . . 6
⊢ (⊤
→ (5 / 3) ∈ ℝ+) |
| 89 | | rpexpmord 14211 |
. . . . . 6
⊢ ((2
∈ ℕ ∧ (2 logb 3) ∈ ℝ+ ∧ (5
/ 3) ∈ ℝ+) → ((2 logb 3) < (5 / 3)
↔ ((2 logb 3)↑2) < ((5 / 3)↑2))) |
| 90 | 67, 73, 88, 89 | syl3anc 1397 |
. . . . 5
⊢ (⊤
→ ((2 logb 3) < (5 / 3) ↔ ((2 logb
3)↑2) < ((5 / 3)↑2))) |
| 91 | 84, 90 | mpbid 235 |
. . . 4
⊢ (⊤
→ ((2 logb 3)↑2) < ((5 / 3)↑2)) |
| 92 | 81 | recnd 11243 |
. . . . . 6
⊢ (⊤
→ (5 / 3) ∈ ℂ) |
| 93 | 92 | sqvald 14186 |
. . . . 5
⊢ (⊤
→ ((5 / 3)↑2) = ((5 / 3) · (5 / 3))) |
| 94 | 79 | recnd 11243 |
. . . . . . 7
⊢ (⊤
→ 5 ∈ ℂ) |
| 95 | 94, 51, 94, 51, 80, 80 | divmuldivd 12038 |
. . . . . 6
⊢ (⊤
→ ((5 / 3) · (5 / 3)) = ((5 · 5) / (3 ·
3))) |
| 96 | | 5t5e25 12825 |
. . . . . . . . 9
⊢ (5
· 5) = ;25 |
| 97 | 96 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ (5 · 5) = ;25) |
| 98 | 43 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ (3 · 3) = 9) |
| 99 | 97, 98 | oveq12d 7430 |
. . . . . . 7
⊢ (⊤
→ ((5 · 5) / (3 · 3)) = (;25 / 9)) |
| 100 | | 2nn0 12527 |
. . . . . . . . . . 11
⊢ 2 ∈
ℕ0 |
| 101 | | 5nn0 12530 |
. . . . . . . . . . 11
⊢ 5 ∈
ℕ0 |
| 102 | | 7nn 12339 |
. . . . . . . . . . 11
⊢ 7 ∈
ℕ |
| 103 | | 5lt7 12436 |
. . . . . . . . . . 11
⊢ 5 <
7 |
| 104 | 100, 101,
102, 103 | declt 12750 |
. . . . . . . . . 10
⊢ ;25 < ;27 |
| 105 | | 9cn 12347 |
. . . . . . . . . . 11
⊢ 9 ∈
ℂ |
| 106 | | 3cn 12328 |
. . . . . . . . . . 11
⊢ 3 ∈
ℂ |
| 107 | | 9t3e27 12845 |
. . . . . . . . . . 11
⊢ (9
· 3) = ;27 |
| 108 | 105, 106,
107 | mulcomli 11224 |
. . . . . . . . . 10
⊢ (3
· 9) = ;27 |
| 109 | 104, 108 | breqtrri 5137 |
. . . . . . . . 9
⊢ ;25 < (3 · 9) |
| 110 | 109 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ ;25 < (3 ·
9)) |
| 111 | 100, 85 | decnncl 12741 |
. . . . . . . . . . 11
⊢ ;25 ∈ ℕ |
| 112 | 111 | a1i 11 |
. . . . . . . . . 10
⊢ (⊤
→ ;25 ∈
ℕ) |
| 113 | 112 | nnred 12254 |
. . . . . . . . 9
⊢ (⊤
→ ;25 ∈
ℝ) |
| 114 | | 9nn 12345 |
. . . . . . . . . . 11
⊢ 9 ∈
ℕ |
| 115 | 114 | a1i 11 |
. . . . . . . . . 10
⊢ (⊤
→ 9 ∈ ℕ) |
| 116 | 115 | nnrpd 13064 |
. . . . . . . . 9
⊢ (⊤
→ 9 ∈ ℝ+) |
| 117 | 113, 5, 116 | ltdivmul2d 13118 |
. . . . . . . 8
⊢ (⊤
→ ((;25 / 9) < 3 ↔
;25 < (3 ·
9))) |
| 118 | 110, 117 | mpbird 260 |
. . . . . . 7
⊢ (⊤
→ (;25 / 9) <
3) |
| 119 | 99, 118 | eqbrtrd 5132 |
. . . . . 6
⊢ (⊤
→ ((5 · 5) / (3 · 3)) < 3) |
| 120 | 95, 119 | eqbrtrd 5132 |
. . . . 5
⊢ (⊤
→ ((5 / 3) · (5 / 3)) < 3) |
| 121 | 93, 120 | eqbrtrd 5132 |
. . . 4
⊢ (⊤
→ ((5 / 3)↑2) < 3) |
| 122 | 18, 83, 5, 91, 121 | lttrd 11377 |
. . 3
⊢ (⊤
→ ((2 logb 3)↑2) < 3) |
| 123 | 77, 122 | jca 520 |
. 2
⊢ (⊤
→ (2 < ((2 logb 3)↑2) ∧ ((2 logb
3)↑2) < 3)) |
| 124 | 1, 123 | ax-mp 5 |
1
⊢ (2 <
((2 logb 3)↑2) ∧ ((2 logb 3)↑2) <
3) |