Proof of Theorem reeff1o
| Step | Hyp | Ref
| Expression |
| 1 | | df-f1o 3203 |
. 2
⊢ ((exp ↾ ℝ):ℝ–1-1-onto→(0(,)
+∞) ↔ ((exp ↾ ℝ):ℝ–1-1→(0(,) +∞) ⋀ (exp ↾ ℝ):ℝ–onto→(0(,) +∞))) |
| 2 | | reeff1 7410 |
. 2
⊢ (exp ↾ ℝ):ℝ–1-1→(0(,) +∞) |
| 3 | | df-fo 3202 |
. . 3
⊢ ((exp ↾ ℝ):ℝ–onto→(0(,) +∞) ↔ ((exp ↾ ℝ) Fn ℝ ⋀ ran (exp
↾ ℝ) =
(0(,) +∞))) |
| 4 | | axresscn 5280 |
. . . 4
⊢ ℝ ⊆ ℂ |
| 5 | | sumex 6981 |
. . . . . 6
⊢ Σk ∈ ℕ0 ((p↑k) / (!
‘k)) ∈ V |
| 6 | | df-ef 7298 |
. . . . . 6
⊢ exp = {〈p, q〉∣(p ∈ ℂ ⋀ q =
Σk ∈ ℕ0
((p↑k) / (! ‘k)))} |
| 7 | 5, 6 | fnopab2 3624 |
. . . . 5
⊢ exp Fn ℂ |
| 8 | | fnssresb 3605 |
. . . . 5
⊢ (exp Fn ℂ → ((exp ↾ ℝ) Fn ℝ ↔ ℝ
⊆ ℂ)) |
| 9 | 7, 8 | ax-mp 7 |
. . . 4
⊢ ((exp ↾ ℝ) Fn ℝ ↔ ℝ
⊆ ℂ) |
| 10 | 4, 9 | mpbir 190 |
. . 3
⊢ (exp ↾ ℝ) Fn ℝ |
| 11 | | df-f1 3201 |
. . . . . . . 8
⊢ ((exp ↾ ℝ):ℝ–1-1→(0(,) +∞) ↔ ((exp ↾ ℝ):ℝ–→(0(,) +∞) ⋀ Fun ◡(exp ↾
ℝ))) |
| 12 | 2, 11 | mpbi 189 |
. . . . . . 7
⊢ ((exp ↾ ℝ):ℝ–→(0(,) +∞) ⋀ Fun ◡(exp ↾
ℝ)) |
| 13 | 12 | pm3.26i 320 |
. . . . . 6
⊢ (exp ↾ ℝ):ℝ–→(0(,) +∞) |
| 14 | | df-f 3200 |
. . . . . 6
⊢ ((exp ↾ ℝ):ℝ–→(0(,) +∞) ↔ ((exp ↾ ℝ) Fn ℝ ⋀ ran (exp
↾ ℝ)
⊆ (0(,) +∞))) |
| 15 | 13, 14 | mpbi 189 |
. . . . 5
⊢ ((exp ↾ ℝ) Fn ℝ ⋀ ran (exp
↾ ℝ)
⊆ (0(,) +∞)) |
| 16 | 15 | pm3.27i 324 |
. . . 4
⊢ ran (exp ↾ ℝ) ⊆ (0(,) +∞) |
| 17 | | 1re 5447 |
. . . . . . . . . 10
⊢ 1 ∈ ℝ |
| 18 | | lelttrit 5634 |
. . . . . . . . . . 11
⊢ ((z ∈ ℝ ⋀ 1 ∈ ℝ) →
(z ≤ 1 ⋁ 1 < z)) |
| 19 | | leloet 5530 |
. . . . . . . . . . . 12
⊢ ((z ∈ ℝ ⋀ 1 ∈ ℝ) →
(z ≤ 1 ↔ (z < 1 ⋁
z = 1))) |
| 20 | 19 | orbi1d 617 |
. . . . . . . . . . 11
⊢ ((z ∈ ℝ ⋀ 1 ∈ ℝ) →
((z ≤ 1 ⋁ 1 < z)
↔ ((z < 1 ⋁ z = 1) ⋁ 1 < z))) |
| 21 | 18, 20 | mpbid 195 |
. . . . . . . . . 10
⊢ ((z ∈ ℝ ⋀ 1 ∈ ℝ) →
((z < 1 ⋁ z = 1) ⋁ 1 < z)) |
| 22 | 17, 21 | mpan2 698 |
. . . . . . . . 9
⊢ (z ∈ ℝ → ((z
< 1 ⋁ z = 1) ⋁ 1 <
z)) |
| 23 | 22 | adantr 391 |
. . . . . . . 8
⊢ ((z ∈ ℝ ⋀ 0 <
z) → ((z < 1 ⋁
z = 1) ⋁
1 < z)) |
| 24 | | reclt1t 5900 |
. . . . . . . . . . . 12
⊢ ((z ∈ ℝ ⋀ 0 <
z) → (z < 1 ↔ 1 < (1 / z))) |
| 25 | | reeff1olem2 7425 |
. . . . . . . . . . . . . . . 16
⊢ (((1 / z) ∈ ℝ ⋀ 1 < (1 /
z)) → ∃y ∈ ℝ (exp
‘y) = (1 / z)) |
| 26 | | gt0ne0t 5630 |
. . . . . . . . . . . . . . . . 17
⊢ ((z ∈ ℝ ⋀ 0 <
z) → z ≠ 0) |
| 27 | | rerecclt 5805 |
. . . . . . . . . . . . . . . . 17
⊢ ((z ∈ ℝ ⋀ z ≠ 0) → (1 / z) ∈ ℝ) |
| 28 | 26, 27 | syldan 469 |
. . . . . . . . . . . . . . . 16
⊢ ((z ∈ ℝ ⋀ 0 <
z) → (1 / z) ∈ ℝ) |
| 29 | 25, 28 | sylan 450 |
. . . . . . . . . . . . . . 15
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀ 1
< (1 / z)) → ∃y ∈ ℝ (exp
‘y) = (1 / z)) |
| 30 | | rec11rt 5781 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (((z ∈ ℂ ⋀ (exp
‘y) ∈ ℂ) ⋀ (z ≠ 0
⋀ (exp ‘y) ≠ 0)) → ((1 / z) = (exp ‘y) ↔ (1 / (exp ‘y)) = z)) |
| 31 | 30 | an4s 510 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((z ∈ ℂ ⋀ z ≠ 0) ⋀ ((exp
‘y) ∈ ℂ ⋀ (exp ‘y) ≠ 0)) → ((1 / z) = (exp ‘y) ↔ (1 / (exp ‘y)) = z)) |
| 32 | | recnt 5325 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (z ∈ ℝ → z
∈ ℂ) |
| 33 | 32 | adantr 391 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((z ∈ ℝ ⋀ 0 <
z) → z ∈ ℂ) |
| 34 | 33, 26 | jca 288 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((z ∈ ℝ ⋀ 0 <
z) → (z ∈ ℂ ⋀ z ≠ 0)) |
| 35 | | recnt 5325 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (y ∈ ℝ → y
∈ ℂ) |
| 36 | | efclt 7312 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (y ∈ ℂ → (exp ‘y) ∈ ℂ) |
| 37 | 35, 36 | syl 10 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (y ∈ ℝ → (exp ‘y) ∈ ℂ) |
| 38 | | efne0t 7369 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (y ∈ ℂ → (exp ‘y) ≠ 0) |
| 39 | 35, 38 | syl 10 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (y ∈ ℝ → (exp ‘y) ≠ 0) |
| 40 | 37, 39 | jca 288 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (y ∈ ℝ → ((exp ‘y) ∈ ℂ ⋀ (exp
‘y) ≠ 0)) |
| 41 | 31, 34, 40 | syl2an 456 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
y ∈ ℝ) → ((1 / z) = (exp ‘y) ↔ (1 / (exp ‘y)) = z)) |
| 42 | | efcant 7368 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (y ∈ ℂ → ((exp ‘y) · (exp ‘-y)) = 1) |
| 43 | 42 | eqcomd 1483 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (y ∈ ℂ → 1 = ((exp ‘y) · (exp ‘-y))) |
| 44 | | divmul2t 5720 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (((1 ∈ ℂ ⋀ (exp ‘y) ∈ ℂ ⋀ (exp
‘-y) ∈ ℂ) ⋀ (exp ‘y) ≠ 0) → ((1 / (exp ‘y)) = (exp ‘-y) ↔ 1 = ((exp ‘y) · (exp ‘-y)))) |
| 45 | | ax1cn 5281 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ 1 ∈ ℂ |
| 46 | 45 | a1i 8 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (y ∈ ℂ → 1 ∈
ℂ) |
| 47 | | negclt 5380 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (y ∈ ℂ → -y
∈ ℂ) |
| 48 | | efclt 7312 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (-y ∈ ℂ → (exp ‘-y) ∈ ℂ) |
| 49 | 47, 48 | syl 10 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (y ∈ ℂ → (exp ‘-y) ∈ ℂ) |
| 50 | 46, 36, 49 | 3jca 821 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (y ∈ ℂ → (1 ∈
ℂ ⋀ (exp
‘y) ∈ ℂ ⋀ (exp ‘-y) ∈ ℂ)) |
| 51 | 44, 50, 38 | sylanc 473 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (y ∈ ℂ → ((1 / (exp ‘y)) = (exp ‘-y) ↔ 1 = ((exp ‘y) · (exp ‘-y)))) |
| 52 | 43, 51 | mpbird 196 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (y ∈ ℂ → (1 / (exp ‘y)) = (exp ‘-y)) |
| 53 | 35, 52 | syl 10 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (y ∈ ℝ → (1 / (exp ‘y)) = (exp ‘-y)) |
| 54 | 53 | eqeq1d 1486 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (y ∈ ℝ → ((1 / (exp ‘y)) = z ↔
(exp ‘-y) = z)) |
| 55 | 54 | adantl 390 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
y ∈ ℝ) → ((1 / (exp ‘y)) = z ↔
(exp ‘-y) = z)) |
| 56 | 41, 55 | bitrd 530 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
y ∈ ℝ) → ((1 / z) = (exp ‘y) ↔ (exp ‘-y) = z)) |
| 57 | | eqcom 1480 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((1 / z) = (exp ‘y) ↔ (exp ‘y) = (1 / z)) |
| 58 | 56, 57 | syl5bbr 536 |
. . . . . . . . . . . . . . . . . 18
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
y ∈ ℝ) → ((exp ‘y) = (1 / z)
↔ (exp ‘-y) = z)) |
| 59 | 58 | biimpd 153 |
. . . . . . . . . . . . . . . . 17
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
y ∈ ℝ) → ((exp ‘y) = (1 / z)
→ (exp ‘-y) = z)) |
| 60 | 59 | r19.22dva 1742 |
. . . . . . . . . . . . . . . 16
⊢ ((z ∈ ℝ ⋀ 0 <
z) → (∃y ∈ ℝ (exp
‘y) = (1 / z) → ∃y ∈ ℝ (exp
‘-y) = z)) |
| 61 | 60 | adantr 391 |
. . . . . . . . . . . . . . 15
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀ 1
< (1 / z)) → (∃y ∈ ℝ (exp
‘y) = (1 / z) → ∃y ∈ ℝ (exp
‘-y) = z)) |
| 62 | 29, 61 | mpd 26 |
. . . . . . . . . . . . . 14
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀ 1
< (1 / z)) → ∃y ∈ ℝ (exp
‘-y) = z) |
| 63 | | renegclt 5449 |
. . . . . . . . . . . . . . 15
⊢ (y ∈ ℝ → -y
∈ ℝ) |
| 64 | | infm3lem 6055 |
. . . . . . . . . . . . . . 15
⊢ (x ∈ ℝ → ∃y ∈ ℝ x = -y) |
| 65 | | fveq2 3730 |
. . . . . . . . . . . . . . . 16
⊢ (x = -y →
(exp ‘x) = (exp ‘-y)) |
| 66 | 65 | eqeq1d 1486 |
. . . . . . . . . . . . . . 15
⊢ (x = -y →
((exp ‘x) = z ↔ (exp ‘-y) = z)) |
| 67 | 63, 64, 66 | rexxfr 2907 |
. . . . . . . . . . . . . 14
⊢ (∃x ∈ ℝ (exp
‘x) = z ↔ ∃y ∈ ℝ (exp
‘-y) = z) |
| 68 | 62, 67 | sylibr 200 |
. . . . . . . . . . . . 13
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀ 1
< (1 / z)) → ∃x ∈ ℝ (exp
‘x) = z) |
| 69 | 68 | ex 373 |
. . . . . . . . . . . 12
⊢ ((z ∈ ℝ ⋀ 0 <
z) → (1 < (1 / z) → ∃x ∈ ℝ (exp
‘x) = z)) |
| 70 | 24, 69 | sylbid 203 |
. . . . . . . . . . 11
⊢ ((z ∈ ℝ ⋀ 0 <
z) → (z < 1 → ∃x ∈ ℝ (exp
‘x) = z)) |
| 71 | 70 | imp 350 |
. . . . . . . . . 10
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
z < 1) → ∃x ∈ ℝ (exp
‘x) = z) |
| 72 | | ef0 7335 |
. . . . . . . . . . . . 13
⊢ (exp ‘0) =
1 |
| 73 | 72 | eqeq2i 1488 |
. . . . . . . . . . . 12
⊢ (z = (exp ‘0) ↔ z = 1) |
| 74 | | 0re 5452 |
. . . . . . . . . . . . . 14
⊢ 0 ∈ ℝ |
| 75 | | fveq2 3730 |
. . . . . . . . . . . . . . . 16
⊢ (x = 0 → (exp ‘x) = (exp ‘0)) |
| 76 | 75 | eqeq1d 1486 |
. . . . . . . . . . . . . . 15
⊢ (x = 0 → ((exp ‘x) = z ↔
(exp ‘0) = z)) |
| 77 | 76 | rcla4ev 1880 |
. . . . . . . . . . . . . 14
⊢ ((0 ∈ ℝ ⋀ (exp ‘0) = z) → ∃x ∈ ℝ (exp
‘x) = z) |
| 78 | 74, 77 | mpan 697 |
. . . . . . . . . . . . 13
⊢ ((exp ‘0) = z → ∃x ∈ ℝ (exp
‘x) = z) |
| 79 | 78 | eqcoms 1481 |
. . . . . . . . . . . 12
⊢ (z = (exp ‘0) → ∃x ∈ ℝ (exp
‘x) = z) |
| 80 | 73, 79 | sylbir 201 |
. . . . . . . . . . 11
⊢ (z = 1 → ∃x ∈ ℝ (exp
‘x) = z) |
| 81 | 80 | adantl 390 |
. . . . . . . . . 10
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
z = 1) → ∃x ∈ ℝ (exp
‘x) = z) |
| 82 | 71, 81 | jaodan 428 |
. . . . . . . . 9
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
(z < 1 ⋁ z = 1))
→ ∃x ∈ ℝ (exp ‘x) = z) |
| 83 | | reeff1olem2 7425 |
. . . . . . . . . 10
⊢ ((z ∈ ℝ ⋀ 1 <
z) → ∃x ∈ ℝ (exp
‘x) = z) |
| 84 | 83 | adantlr 395 |
. . . . . . . . 9
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀ 1
< z) → ∃x ∈ ℝ (exp
‘x) = z) |
| 85 | 82, 84 | jaodan 428 |
. . . . . . . 8
⊢ (((z ∈ ℝ ⋀ 0 <
z) ⋀
((z < 1 ⋁ z = 1) ⋁ 1 < z))
→ ∃x ∈ ℝ (exp ‘x) = z) |
| 86 | 23, 85 | mpdan 706 |
. . . . . . 7
⊢ ((z ∈ ℝ ⋀ 0 <
z) → ∃x ∈ ℝ (exp
‘x) = z) |
| 87 | | repos 6400 |
. . . . . . 7
⊢ (z ∈ (0(,)
+∞) ↔ (z ∈ ℝ ⋀ 0 < z)) |
| 88 | | fvres 3740 |
. . . . . . . . 9
⊢ (x ∈ ℝ → ((exp ↾ ℝ)
‘x) = (exp ‘x)) |
| 89 | 88 | eqeq1d 1486 |
. . . . . . . 8
⊢ (x ∈ ℝ → (((exp ↾ ℝ)
‘x) = z ↔ (exp ‘x) = z)) |
| 90 | 89 | rexbiia 1677 |
. . . . . . 7
⊢ (∃x ∈ ℝ ((exp ↾ ℝ)
‘x) = z ↔ ∃x ∈ ℝ (exp
‘x) = z) |
| 91 | 86, 87, 90 | 3imtr4 219 |
. . . . . 6
⊢ (z ∈ (0(,)
+∞) → ∃x ∈ ℝ ((exp ↾ ℝ) ‘x) =
z) |
| 92 | | fvelrnb 3766 |
. . . . . . 7
⊢ ((exp ↾ ℝ) Fn ℝ → (z
∈ ran (exp ↾ ℝ) ↔
∃x ∈ ℝ ((exp ↾ ℝ)
‘x) = z)) |
| 93 | 10, 92 | ax-mp 7 |
. . . . . 6
⊢ (z ∈ ran (exp ↾ ℝ) ↔
∃x ∈ ℝ ((exp ↾ ℝ)
‘x) = z) |
| 94 | 91, 93 | sylibr 200 |
. . . . 5
⊢ (z ∈ (0(,)
+∞) → z ∈ ran (exp ↾
ℝ)) |
| 95 | 94 | ssriv 2072 |
. . . 4
⊢ (0(,) +∞) ⊆ ran (exp ↾
ℝ) |
| 96 | 16, 95 | eqssi 2081 |
. . 3
⊢ ran (exp ↾ ℝ) = (0(,)
+∞) |
| 97 | 3, 10, 96 | mpbir2an 732 |
. 2
⊢ (exp ↾ ℝ):ℝ–onto→(0(,) +∞) |
| 98 | 1, 2, 97 | mpbir2an 732 |
1
⊢ (exp ↾ ℝ):ℝ–1-1-onto→(0(,)
+∞) |