Proof of Theorem logdivlt
| Step | Hyp | Ref
| Expression |
| 1 | | logdivlti 15986 |
. . . . . 6
⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ e ≤
𝐴) ∧ 𝐴 < 𝐵) → ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) |
| 2 | 1 | ex 115 |
. . . . 5
⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ e ≤
𝐴) → (𝐴 < 𝐵 → ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴))) |
| 3 | 2 | 3expa 1234 |
. . . 4
⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ e ≤
𝐴) → (𝐴 < 𝐵 → ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴))) |
| 4 | 3 | an32s 574 |
. . 3
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴))) |
| 5 | 4 | adantrr 483 |
. 2
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (𝐴 < 𝐵 → ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴))) |
| 6 | | simpll 531 |
. . . . . . . . . . . . . 14
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 𝐴 ∈ ℝ) |
| 7 | 6 | adantr 276 |
. . . . . . . . . . . . 13
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐴 ∈ ℝ) |
| 8 | | 0red 8327 |
. . . . . . . . . . . . . 14
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 0 ∈ ℝ) |
| 9 | | ere 12439 |
. . . . . . . . . . . . . . 15
⊢ e ∈
ℝ |
| 10 | 9 | a1i 9 |
. . . . . . . . . . . . . 14
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → e ∈ ℝ) |
| 11 | | epos 12550 |
. . . . . . . . . . . . . . 15
⊢ 0 <
e |
| 12 | 11 | a1i 9 |
. . . . . . . . . . . . . 14
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 0 < e) |
| 13 | | simpllr 540 |
. . . . . . . . . . . . . 14
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → e ≤ 𝐴) |
| 14 | 8, 10, 7, 12, 13 | ltletrd 8751 |
. . . . . . . . . . . . 13
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 0 < 𝐴) |
| 15 | 7, 14 | elrpd 10096 |
. . . . . . . . . . . 12
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐴 ∈
ℝ+) |
| 16 | 15 | relogcld 15987 |
. . . . . . . . . . 11
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (log‘𝐴) ∈ ℝ) |
| 17 | 16 | recnd 8354 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (log‘𝐴) ∈ ℂ) |
| 18 | 17 | adantr 276 |
. . . . . . . . 9
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → (log‘𝐴) ∈ ℂ) |
| 19 | 18 | mulridd 8343 |
. . . . . . . 8
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → ((log‘𝐴) · 1) = (log‘𝐴)) |
| 20 | | simpr 110 |
. . . . . . . . 9
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → ((log‘𝐵) / (log‘𝐴)) # 1) |
| 21 | | simprl 535 |
. . . . . . . . . . . . . 14
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 𝐵 ∈ ℝ) |
| 22 | | 0red 8327 |
. . . . . . . . . . . . . . 15
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 0 ∈
ℝ) |
| 23 | 9 | a1i 9 |
. . . . . . . . . . . . . . 15
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → e ∈
ℝ) |
| 24 | 11 | a1i 9 |
. . . . . . . . . . . . . . 15
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 0 <
e) |
| 25 | | simprr 537 |
. . . . . . . . . . . . . . 15
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → e ≤ 𝐵) |
| 26 | 22, 23, 21, 24, 25 | ltletrd 8751 |
. . . . . . . . . . . . . 14
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 0 < 𝐵) |
| 27 | 21, 26 | elrpd 10096 |
. . . . . . . . . . . . 13
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 𝐵 ∈
ℝ+) |
| 28 | 27 | relogcld 15987 |
. . . . . . . . . . . 12
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (log‘𝐵) ∈
ℝ) |
| 29 | 28 | recnd 8354 |
. . . . . . . . . . 11
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (log‘𝐵) ∈
ℂ) |
| 30 | 29 | ad2antrr 492 |
. . . . . . . . . 10
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → (log‘𝐵) ∈ ℂ) |
| 31 | | 1cnd 8342 |
. . . . . . . . . 10
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → 1 ∈
ℂ) |
| 32 | | simplr 533 |
. . . . . . . . . . . . . . 15
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → e ≤ 𝐴) |
| 33 | 22, 23, 6, 24, 32 | ltletrd 8751 |
. . . . . . . . . . . . . 14
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 0 < 𝐴) |
| 34 | 6, 33 | elrpd 10096 |
. . . . . . . . . . . . 13
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 𝐴 ∈
ℝ+) |
| 35 | 34 | relogcld 15987 |
. . . . . . . . . . . 12
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (log‘𝐴) ∈
ℝ) |
| 36 | | 1red 8341 |
. . . . . . . . . . . . . 14
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 1 ∈
ℝ) |
| 37 | | 2re 9375 |
. . . . . . . . . . . . . . 15
⊢ 2 ∈
ℝ |
| 38 | 37 | a1i 9 |
. . . . . . . . . . . . . 14
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 2 ∈
ℝ) |
| 39 | | 1lt2 9476 |
. . . . . . . . . . . . . . 15
⊢ 1 <
2 |
| 40 | 39 | a1i 9 |
. . . . . . . . . . . . . 14
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 1 <
2) |
| 41 | | egt2lt3 12549 |
. . . . . . . . . . . . . . . . 17
⊢ (2 < e
∧ e < 3) |
| 42 | 41 | simpli 111 |
. . . . . . . . . . . . . . . 16
⊢ 2 <
e |
| 43 | 42 | a1i 9 |
. . . . . . . . . . . . . . 15
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 2 <
e) |
| 44 | 38, 23, 6, 43, 32 | ltletrd 8751 |
. . . . . . . . . . . . . 14
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 2 < 𝐴) |
| 45 | 36, 38, 6, 40, 44 | lttrd 8452 |
. . . . . . . . . . . . 13
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 1 < 𝐴) |
| 46 | | loggt0b 15996 |
. . . . . . . . . . . . . 14
⊢ (𝐴 ∈ ℝ+
→ (0 < (log‘𝐴) ↔ 1 < 𝐴)) |
| 47 | 34, 46 | syl 14 |
. . . . . . . . . . . . 13
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (0 <
(log‘𝐴) ↔ 1 <
𝐴)) |
| 48 | 45, 47 | mpbird 167 |
. . . . . . . . . . . 12
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 0 <
(log‘𝐴)) |
| 49 | 35, 48 | gt0ap0d 8958 |
. . . . . . . . . . 11
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (log‘𝐴) # 0) |
| 50 | 49 | ad2antrr 492 |
. . . . . . . . . 10
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → (log‘𝐴) # 0) |
| 51 | 30, 18, 31, 50 | apdivmuld 9144 |
. . . . . . . . 9
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → (((log‘𝐵) / (log‘𝐴)) # 1 ↔ ((log‘𝐴) · 1) # (log‘𝐵))) |
| 52 | 20, 51 | mpbid 147 |
. . . . . . . 8
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → ((log‘𝐴) · 1) # (log‘𝐵)) |
| 53 | 19, 52 | eqbrtrrd 4154 |
. . . . . . 7
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → (log‘𝐴) # (log‘𝐵)) |
| 54 | 15 | adantr 276 |
. . . . . . . 8
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → 𝐴 ∈
ℝ+) |
| 55 | 21 | adantr 276 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐵 ∈ ℝ) |
| 56 | | simplrr 542 |
. . . . . . . . . . 11
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → e ≤ 𝐵) |
| 57 | 8, 10, 55, 12, 56 | ltletrd 8751 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 0 < 𝐵) |
| 58 | 55, 57 | elrpd 10096 |
. . . . . . . . 9
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐵 ∈
ℝ+) |
| 59 | 58 | adantr 276 |
. . . . . . . 8
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → 𝐵 ∈
ℝ+) |
| 60 | | reaplog 15972 |
. . . . . . . 8
⊢ ((𝐴 ∈ ℝ+
∧ 𝐵 ∈
ℝ+) → (𝐴 # 𝐵 ↔ (log‘𝐴) # (log‘𝐵))) |
| 61 | 54, 59, 60 | syl2anc 415 |
. . . . . . 7
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → (𝐴 # 𝐵 ↔ (log‘𝐴) # (log‘𝐵))) |
| 62 | 53, 61 | mpbird 167 |
. . . . . 6
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ ((log‘𝐵) / (log‘𝐴)) # 1) → 𝐴 # 𝐵) |
| 63 | 7 | adantr 276 |
. . . . . . . . 9
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → 𝐴 ∈ ℝ) |
| 64 | 63 | recnd 8354 |
. . . . . . . 8
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → 𝐴 ∈ ℂ) |
| 65 | 64 | mulridd 8343 |
. . . . . . 7
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → (𝐴 · 1) = 𝐴) |
| 66 | | simpr 110 |
. . . . . . . 8
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → (𝐵 / 𝐴) # 1) |
| 67 | 55 | recnd 8354 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐵 ∈ ℂ) |
| 68 | 67 | adantr 276 |
. . . . . . . . 9
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → 𝐵 ∈ ℂ) |
| 69 | | 1cnd 8342 |
. . . . . . . . 9
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → 1 ∈
ℂ) |
| 70 | 6, 33 | gt0ap0d 8958 |
. . . . . . . . . 10
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → 𝐴 # 0) |
| 71 | 70 | ad2antrr 492 |
. . . . . . . . 9
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → 𝐴 # 0) |
| 72 | 68, 64, 69, 71 | apdivmuld 9144 |
. . . . . . . 8
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → ((𝐵 / 𝐴) # 1 ↔ (𝐴 · 1) # 𝐵)) |
| 73 | 66, 72 | mpbid 147 |
. . . . . . 7
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → (𝐴 · 1) # 𝐵) |
| 74 | 65, 73 | eqbrtrrd 4154 |
. . . . . 6
⊢
(((((𝐴 ∈
ℝ ∧ e ≤ 𝐴)
∧ (𝐵 ∈ ℝ
∧ e ≤ 𝐵)) ∧
((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) ∧ (𝐵 / 𝐴) # 1) → 𝐴 # 𝐵) |
| 75 | 58 | relogcld 15987 |
. . . . . . . . 9
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (log‘𝐵) ∈ ℝ) |
| 76 | 48 | adantr 276 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 0 < (log‘𝐴)) |
| 77 | 16, 76 | elrpd 10096 |
. . . . . . . . 9
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (log‘𝐴) ∈
ℝ+) |
| 78 | 75, 77 | rerpdivcld 10131 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐵) / (log‘𝐴)) ∈ ℝ) |
| 79 | 55, 15 | rerpdivcld 10131 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (𝐵 / 𝐴) ∈ ℝ) |
| 80 | | simpr 110 |
. . . . . . . . . . 11
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) |
| 81 | 75, 15, 16, 58 | lt2mul2divd 10168 |
. . . . . . . . . . 11
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (((log‘𝐵) · 𝐴) < ((log‘𝐴) · 𝐵) ↔ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴))) |
| 82 | 80, 81 | mpbird 167 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐵) · 𝐴) < ((log‘𝐴) · 𝐵)) |
| 83 | 17, 67 | mulcomd 8347 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐴) · 𝐵) = (𝐵 · (log‘𝐴))) |
| 84 | 82, 83 | breqtrd 4156 |
. . . . . . . . 9
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐵) · 𝐴) < (𝐵 · (log‘𝐴))) |
| 85 | 75, 15, 55, 77 | lt2mul2divd 10168 |
. . . . . . . . 9
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (((log‘𝐵) · 𝐴) < (𝐵 · (log‘𝐴)) ↔ ((log‘𝐵) / (log‘𝐴)) < (𝐵 / 𝐴))) |
| 86 | 84, 85 | mpbid 147 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐵) / (log‘𝐴)) < (𝐵 / 𝐴)) |
| 87 | 78, 79, 86 | ltapd 8967 |
. . . . . . 7
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐵) / (log‘𝐴)) # (𝐵 / 𝐴)) |
| 88 | 78 | recnd 8354 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐵) / (log‘𝐴)) ∈ ℂ) |
| 89 | 79 | recnd 8354 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (𝐵 / 𝐴) ∈ ℂ) |
| 90 | | 1cnd 8342 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 1 ∈ ℂ) |
| 91 | | apcotr 8936 |
. . . . . . . 8
⊢
((((log‘𝐵) /
(log‘𝐴)) ∈
ℂ ∧ (𝐵 / 𝐴) ∈ ℂ ∧ 1 ∈
ℂ) → (((log‘𝐵) / (log‘𝐴)) # (𝐵 / 𝐴) → (((log‘𝐵) / (log‘𝐴)) # 1 ∨ (𝐵 / 𝐴) # 1))) |
| 92 | 88, 89, 90, 91 | syl3anc 1278 |
. . . . . . 7
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (((log‘𝐵) / (log‘𝐴)) # (𝐵 / 𝐴) → (((log‘𝐵) / (log‘𝐴)) # 1 ∨ (𝐵 / 𝐴) # 1))) |
| 93 | 87, 92 | mpd 13 |
. . . . . 6
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (((log‘𝐵) / (log‘𝐴)) # 1 ∨ (𝐵 / 𝐴) # 1)) |
| 94 | 62, 74, 93 | mpjaodan 810 |
. . . . 5
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐴 # 𝐵) |
| 95 | 7 | recnd 8354 |
. . . . . 6
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐴 ∈ ℂ) |
| 96 | | apsym 8935 |
. . . . . 6
⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 # 𝐵 ↔ 𝐵 # 𝐴)) |
| 97 | 95, 67, 96 | syl2anc 415 |
. . . . 5
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (𝐴 # 𝐵 ↔ 𝐵 # 𝐴)) |
| 98 | 94, 97 | mpbid 147 |
. . . 4
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐵 # 𝐴) |
| 99 | 75, 58 | rerpdivcld 10131 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐵) / 𝐵) ∈ ℝ) |
| 100 | 16, 15 | rerpdivcld 10131 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ((log‘𝐴) / 𝐴) ∈ ℝ) |
| 101 | 99, 100, 80 | ltnsymd 8446 |
. . . . . . 7
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ¬ ((log‘𝐴) / 𝐴) < ((log‘𝐵) / 𝐵)) |
| 102 | | logdivlti 15986 |
. . . . . . . . . 10
⊢ (((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ e ≤
𝐵) ∧ 𝐵 < 𝐴) → ((log‘𝐴) / 𝐴) < ((log‘𝐵) / 𝐵)) |
| 103 | 102 | ex 115 |
. . . . . . . . 9
⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ e ≤
𝐵) → (𝐵 < 𝐴 → ((log‘𝐴) / 𝐴) < ((log‘𝐵) / 𝐵))) |
| 104 | 103 | con3d 640 |
. . . . . . . 8
⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ e ≤
𝐵) → (¬
((log‘𝐴) / 𝐴) < ((log‘𝐵) / 𝐵) → ¬ 𝐵 < 𝐴)) |
| 105 | 55, 7, 56, 104 | syl3anc 1278 |
. . . . . . 7
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (¬ ((log‘𝐴) / 𝐴) < ((log‘𝐵) / 𝐵) → ¬ 𝐵 < 𝐴)) |
| 106 | 101, 105 | mpd 13 |
. . . . . 6
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → ¬ 𝐵 < 𝐴) |
| 107 | 6, 21 | lenltd 8444 |
. . . . . . 7
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| 108 | 107 | adantr 276 |
. . . . . 6
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| 109 | 106, 108 | mpbird 167 |
. . . . 5
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐴 ≤ 𝐵) |
| 110 | 7, 55, 109 | leltapd 8968 |
. . . 4
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → (𝐴 < 𝐵 ↔ 𝐵 # 𝐴)) |
| 111 | 98, 110 | mpbird 167 |
. . 3
⊢ ((((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) ∧ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴)) → 𝐴 < 𝐵) |
| 112 | 111 | ex 115 |
. 2
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴) → 𝐴 < 𝐵)) |
| 113 | 5, 112 | impbid 129 |
1
⊢ (((𝐴 ∈ ℝ ∧ e ≤
𝐴) ∧ (𝐵 ∈ ℝ ∧ e ≤ 𝐵)) → (𝐴 < 𝐵 ↔ ((log‘𝐵) / 𝐵) < ((log‘𝐴) / 𝐴))) |