| Step | Hyp | Ref
| Expression |
| 1 | | 0cn 8018 |
. . 3
⊢ 0 ∈
ℂ |
| 2 | | eqid 2196 |
. . . . 5
⊢
(MetOpen‘(abs ∘ − )) = (MetOpen‘(abs ∘
− )) |
| 3 | 2 | cntoptop 14769 |
. . . 4
⊢
(MetOpen‘(abs ∘ − )) ∈ Top |
| 4 | | unicntopcntop 14778 |
. . . . 5
⊢ ℂ =
∪ (MetOpen‘(abs ∘ −
)) |
| 5 | 4 | ntrtop 14364 |
. . . 4
⊢
((MetOpen‘(abs ∘ − )) ∈ Top →
((int‘(MetOpen‘(abs ∘ − )))‘ℂ) =
ℂ) |
| 6 | 3, 5 | ax-mp 5 |
. . 3
⊢
((int‘(MetOpen‘(abs ∘ − )))‘ℂ) =
ℂ |
| 7 | 1, 6 | eleqtrri 2272 |
. 2
⊢ 0 ∈
((int‘(MetOpen‘(abs ∘ −
)))‘ℂ) |
| 8 | | ax-1cn 7972 |
. . 3
⊢ 1 ∈
ℂ |
| 9 | | 1rp 9732 |
. . . . . 6
⊢ 1 ∈
ℝ+ |
| 10 | | rpmincl 11403 |
. . . . . 6
⊢ ((𝑥 ∈ ℝ+
∧ 1 ∈ ℝ+) → inf({𝑥, 1}, ℝ, < ) ∈
ℝ+) |
| 11 | 9, 10 | mpan2 425 |
. . . . 5
⊢ (𝑥 ∈ ℝ+
→ inf({𝑥, 1}, ℝ,
< ) ∈ ℝ+) |
| 12 | | breq1 4036 |
. . . . . . . 8
⊢ (𝑢 = 𝑤 → (𝑢 # 0 ↔ 𝑤 # 0)) |
| 13 | 12 | elrab 2920 |
. . . . . . 7
⊢ (𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↔ (𝑤 ∈ ℂ ∧ 𝑤 # 0)) |
| 14 | | simprl 529 |
. . . . . . . . . . . . 13
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) → 𝑤 ∈
ℂ) |
| 15 | 14 | subid1d 8326 |
. . . . . . . . . . . 12
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) → (𝑤 − 0) = 𝑤) |
| 16 | 15 | fveq2d 5562 |
. . . . . . . . . . 11
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
(abs‘(𝑤 − 0)) =
(abs‘𝑤)) |
| 17 | 16 | breq1d 4043 |
. . . . . . . . . 10
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
((abs‘(𝑤 − 0))
< inf({𝑥, 1}, ℝ,
< ) ↔ (abs‘𝑤)
< inf({𝑥, 1}, ℝ,
< ))) |
| 18 | 14 | abscld 11346 |
. . . . . . . . . . 11
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
(abs‘𝑤) ∈
ℝ) |
| 19 | | rpre 9735 |
. . . . . . . . . . . 12
⊢ (𝑥 ∈ ℝ+
→ 𝑥 ∈
ℝ) |
| 20 | 19 | adantr 276 |
. . . . . . . . . . 11
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) → 𝑥 ∈
ℝ) |
| 21 | | 1red 8041 |
. . . . . . . . . . 11
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) → 1
∈ ℝ) |
| 22 | | ltmininf 11400 |
. . . . . . . . . . 11
⊢
(((abs‘𝑤)
∈ ℝ ∧ 𝑥
∈ ℝ ∧ 1 ∈ ℝ) → ((abs‘𝑤) < inf({𝑥, 1}, ℝ, < ) ↔
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1))) |
| 23 | 18, 20, 21, 22 | syl3anc 1249 |
. . . . . . . . . 10
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
((abs‘𝑤) <
inf({𝑥, 1}, ℝ, < )
↔ ((abs‘𝑤) <
𝑥 ∧ (abs‘𝑤) < 1))) |
| 24 | 17, 23 | bitrd 188 |
. . . . . . . . 9
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
((abs‘(𝑤 − 0))
< inf({𝑥, 1}, ℝ,
< ) ↔ ((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1))) |
| 25 | | eqid 2196 |
. . . . . . . . . . . . 13
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)) = (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)) |
| 26 | | fveq2 5558 |
. . . . . . . . . . . . . . 15
⊢ (𝑧 = 𝑤 → (exp‘𝑧) = (exp‘𝑤)) |
| 27 | 26 | oveq1d 5937 |
. . . . . . . . . . . . . 14
⊢ (𝑧 = 𝑤 → ((exp‘𝑧) − 1) = ((exp‘𝑤) − 1)) |
| 28 | | id 19 |
. . . . . . . . . . . . . 14
⊢ (𝑧 = 𝑤 → 𝑧 = 𝑤) |
| 29 | 27, 28 | oveq12d 5940 |
. . . . . . . . . . . . 13
⊢ (𝑧 = 𝑤 → (((exp‘𝑧) − 1) / 𝑧) = (((exp‘𝑤) − 1) / 𝑤)) |
| 30 | | simplr 528 |
. . . . . . . . . . . . . 14
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) → (𝑤 ∈ ℂ ∧ 𝑤 # 0)) |
| 31 | 30, 13 | sylibr 134 |
. . . . . . . . . . . . 13
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) → 𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0}) |
| 32 | | efcl 11829 |
. . . . . . . . . . . . . . . 16
⊢ (𝑤 ∈ ℂ →
(exp‘𝑤) ∈
ℂ) |
| 33 | | peano2cnm 8292 |
. . . . . . . . . . . . . . . 16
⊢
((exp‘𝑤)
∈ ℂ → ((exp‘𝑤) − 1) ∈ ℂ) |
| 34 | 14, 32, 33 | 3syl 17 |
. . . . . . . . . . . . . . 15
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
((exp‘𝑤) − 1)
∈ ℂ) |
| 35 | | simprr 531 |
. . . . . . . . . . . . . . 15
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) → 𝑤 # 0) |
| 36 | 34, 14, 35 | divclapd 8817 |
. . . . . . . . . . . . . 14
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
(((exp‘𝑤) − 1)
/ 𝑤) ∈
ℂ) |
| 37 | 36 | adantr 276 |
. . . . . . . . . . . . 13
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
(((exp‘𝑤) − 1)
/ 𝑤) ∈
ℂ) |
| 38 | 25, 29, 31, 37 | fvmptd3 5655 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) → ((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧))‘𝑤) = (((exp‘𝑤) − 1) / 𝑤)) |
| 39 | 38 | fvoveq1d 5944 |
. . . . . . . . . . 11
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
(abs‘(((𝑧 ∈
{𝑢 ∈ ℂ ∣
𝑢 # 0} ↦
(((exp‘𝑧) − 1)
/ 𝑧))‘𝑤) − 1)) =
(abs‘((((exp‘𝑤)
− 1) / 𝑤) −
1))) |
| 40 | | 1cnd 8042 |
. . . . . . . . . . . . . 14
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) → 1 ∈
ℂ) |
| 41 | 37, 40 | subcld 8337 |
. . . . . . . . . . . . 13
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
((((exp‘𝑤) − 1)
/ 𝑤) − 1) ∈
ℂ) |
| 42 | 41 | abscld 11346 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
(abs‘((((exp‘𝑤)
− 1) / 𝑤) − 1))
∈ ℝ) |
| 43 | | simplrl 535 |
. . . . . . . . . . . . 13
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) → 𝑤 ∈
ℂ) |
| 44 | 43 | abscld 11346 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
(abs‘𝑤) ∈
ℝ) |
| 45 | | simpll 527 |
. . . . . . . . . . . . 13
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) → 𝑥 ∈
ℝ+) |
| 46 | 45 | rpred 9771 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) → 𝑥 ∈
ℝ) |
| 47 | | abscl 11216 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑤 ∈ ℂ →
(abs‘𝑤) ∈
ℝ) |
| 48 | 47 | ad2antrr 488 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘𝑤) ∈
ℝ) |
| 49 | 32 | ad2antrr 488 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(exp‘𝑤) ∈
ℂ) |
| 50 | | subcl 8225 |
. . . . . . . . . . . . . . . . . . . . 21
⊢
(((exp‘𝑤)
∈ ℂ ∧ 1 ∈ ℂ) → ((exp‘𝑤) − 1) ∈ ℂ) |
| 51 | 49, 8, 50 | sylancl 413 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((exp‘𝑤) − 1)
∈ ℂ) |
| 52 | | simpll 527 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → 𝑤 ∈
ℂ) |
| 53 | | simplr 528 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → 𝑤 # 0) |
| 54 | 51, 52, 53 | divclapd 8817 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(((exp‘𝑤) − 1)
/ 𝑤) ∈
ℂ) |
| 55 | | 1cnd 8042 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → 1 ∈
ℂ) |
| 56 | 54, 55 | subcld 8337 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((((exp‘𝑤) − 1)
/ 𝑤) − 1) ∈
ℂ) |
| 57 | 56 | abscld 11346 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘((((exp‘𝑤)
− 1) / 𝑤) − 1))
∈ ℝ) |
| 58 | 48, 57 | remulcld 8057 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘𝑤) ·
(abs‘((((exp‘𝑤)
− 1) / 𝑤) −
1))) ∈ ℝ) |
| 59 | 48 | resqcld 10791 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘𝑤)↑2)
∈ ℝ) |
| 60 | | 3re 9064 |
. . . . . . . . . . . . . . . . . 18
⊢ 3 ∈
ℝ |
| 61 | | 4nn 9154 |
. . . . . . . . . . . . . . . . . 18
⊢ 4 ∈
ℕ |
| 62 | | nndivre 9026 |
. . . . . . . . . . . . . . . . . 18
⊢ ((3
∈ ℝ ∧ 4 ∈ ℕ) → (3 / 4) ∈
ℝ) |
| 63 | 60, 61, 62 | mp2an 426 |
. . . . . . . . . . . . . . . . 17
⊢ (3 / 4)
∈ ℝ |
| 64 | | remulcl 8007 |
. . . . . . . . . . . . . . . . 17
⊢
((((abs‘𝑤)↑2) ∈ ℝ ∧ (3 / 4) ∈
ℝ) → (((abs‘𝑤)↑2) · (3 / 4)) ∈
ℝ) |
| 65 | 59, 63, 64 | sylancl 413 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(((abs‘𝑤)↑2)
· (3 / 4)) ∈ ℝ) |
| 66 | 51, 52 | subcld 8337 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(((exp‘𝑤) − 1)
− 𝑤) ∈
ℂ) |
| 67 | 66, 52, 53 | divcanap2d 8819 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (𝑤 · ((((exp‘𝑤) − 1) − 𝑤) / 𝑤)) = (((exp‘𝑤) − 1) − 𝑤)) |
| 68 | 51, 52, 52, 53 | divsubdirapd 8857 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((((exp‘𝑤) − 1)
− 𝑤) / 𝑤) = ((((exp‘𝑤) − 1) / 𝑤) − (𝑤 / 𝑤))) |
| 69 | 52, 53 | dividapd 8813 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (𝑤 / 𝑤) = 1) |
| 70 | 69 | oveq2d 5938 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((((exp‘𝑤) − 1)
/ 𝑤) − (𝑤 / 𝑤)) = ((((exp‘𝑤) − 1) / 𝑤) − 1)) |
| 71 | 68, 70 | eqtrd 2229 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((((exp‘𝑤) − 1)
− 𝑤) / 𝑤) = ((((exp‘𝑤) − 1) / 𝑤) − 1)) |
| 72 | 71 | oveq2d 5938 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (𝑤 · ((((exp‘𝑤) − 1) − 𝑤) / 𝑤)) = (𝑤 · ((((exp‘𝑤) − 1) / 𝑤) − 1))) |
| 73 | 49, 55, 52 | subsub4d 8368 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(((exp‘𝑤) − 1)
− 𝑤) =
((exp‘𝑤) − (1 +
𝑤))) |
| 74 | | addcl 8004 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ ((1
∈ ℂ ∧ 𝑤
∈ ℂ) → (1 + 𝑤) ∈ ℂ) |
| 75 | 8, 52, 74 | sylancr 414 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (1 + 𝑤) ∈
ℂ) |
| 76 | | 2nn0 9266 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ 2 ∈
ℕ0 |
| 77 | | eqid 2196 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (𝑛 ∈ ℕ0
↦ ((𝑤↑𝑛) / (!‘𝑛))) = (𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛))) |
| 78 | 77 | eftlcl 11853 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ ((𝑤 ∈ ℂ ∧ 2 ∈
ℕ0) → Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘) ∈ ℂ) |
| 79 | 52, 76, 78 | sylancl 413 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘) ∈ ℂ) |
| 80 | | df-2 9049 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ 2 = (1 +
1) |
| 81 | | 1nn0 9265 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ 1 ∈
ℕ0 |
| 82 | | 1e0p1 9498 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ 1 = (0 +
1) |
| 83 | | 0nn0 9264 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ 0 ∈
ℕ0 |
| 84 | | 0cnd 8019 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → 0 ∈
ℂ) |
| 85 | 77 | efval2 11830 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
⊢ (𝑤 ∈ ℂ →
(exp‘𝑤) =
Σ𝑘 ∈
ℕ0 ((𝑛
∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘)) |
| 86 | 85 | ad2antrr 488 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(exp‘𝑤) =
Σ𝑘 ∈
ℕ0 ((𝑛
∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘)) |
| 87 | | nn0uz 9636 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
⊢
ℕ0 = (ℤ≥‘0) |
| 88 | 87 | sumeq1i 11528 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢
Σ𝑘 ∈
ℕ0 ((𝑛
∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘) = Σ𝑘 ∈
(ℤ≥‘0)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘) |
| 89 | 86, 88 | eqtr2di 2246 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → Σ𝑘 ∈
(ℤ≥‘0)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘) = (exp‘𝑤)) |
| 90 | 89 | oveq2d 5938 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (0 +
Σ𝑘 ∈
(ℤ≥‘0)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘)) = (0 + (exp‘𝑤))) |
| 91 | 49 | addlidd 8176 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (0 +
(exp‘𝑤)) =
(exp‘𝑤)) |
| 92 | 90, 91 | eqtr2d 2230 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(exp‘𝑤) = (0 +
Σ𝑘 ∈
(ℤ≥‘0)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘))) |
| 93 | | eft0val 11858 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ (𝑤 ∈ ℂ → ((𝑤↑0) / (!‘0)) =
1) |
| 94 | 93 | ad2antrr 488 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → ((𝑤↑0) / (!‘0)) =
1) |
| 95 | 94 | oveq2d 5938 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (0 + ((𝑤↑0) / (!‘0))) = (0 +
1)) |
| 96 | 95, 82 | eqtr4di 2247 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (0 + ((𝑤↑0) / (!‘0))) =
1) |
| 97 | 77, 82, 83, 52, 84, 92, 96 | efsep 11856 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(exp‘𝑤) = (1 +
Σ𝑘 ∈
(ℤ≥‘1)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘))) |
| 98 | | exp1 10637 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
⊢ (𝑤 ∈ ℂ → (𝑤↑1) = 𝑤) |
| 99 | 98 | ad2antrr 488 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (𝑤↑1) = 𝑤) |
| 100 | 99 | oveq1d 5937 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → ((𝑤↑1) / (!‘1)) = (𝑤 /
(!‘1))) |
| 101 | | fac1 10821 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢
(!‘1) = 1 |
| 102 | 101 | oveq2i 5933 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (𝑤 / (!‘1)) = (𝑤 / 1) |
| 103 | 100, 102 | eqtrdi 2245 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → ((𝑤↑1) / (!‘1)) = (𝑤 / 1)) |
| 104 | | div1 8730 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (𝑤 ∈ ℂ → (𝑤 / 1) = 𝑤) |
| 105 | 104 | ad2antrr 488 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (𝑤 / 1) = 𝑤) |
| 106 | 103, 105 | eqtrd 2229 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → ((𝑤↑1) / (!‘1)) = 𝑤) |
| 107 | 106 | oveq2d 5938 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (1 + ((𝑤↑1) / (!‘1))) = (1 +
𝑤)) |
| 108 | 77, 80, 81, 52, 55, 97, 107 | efsep 11856 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(exp‘𝑤) = ((1 + 𝑤) + Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘))) |
| 109 | 75, 79, 108 | mvrladdd 8393 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((exp‘𝑤) − (1 +
𝑤)) = Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘)) |
| 110 | 73, 109 | eqtrd 2229 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(((exp‘𝑤) − 1)
− 𝑤) = Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘)) |
| 111 | 67, 72, 110 | 3eqtr3d 2237 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (𝑤 · ((((exp‘𝑤) − 1) / 𝑤) − 1)) = Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘)) |
| 112 | 111 | fveq2d 5562 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘(𝑤 ·
((((exp‘𝑤) − 1)
/ 𝑤) − 1))) =
(abs‘Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘))) |
| 113 | 52, 56 | absmuld 11359 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘(𝑤 ·
((((exp‘𝑤) − 1)
/ 𝑤) − 1))) =
((abs‘𝑤) ·
(abs‘((((exp‘𝑤)
− 1) / 𝑤) −
1)))) |
| 114 | 112, 113 | eqtr3d 2231 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘)) = ((abs‘𝑤) · (abs‘((((exp‘𝑤) − 1) / 𝑤) − 1)))) |
| 115 | | eqid 2196 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑛 ∈ ℕ0
↦ (((abs‘𝑤)↑𝑛) / (!‘𝑛))) = (𝑛 ∈ ℕ0 ↦
(((abs‘𝑤)↑𝑛) / (!‘𝑛))) |
| 116 | | eqid 2196 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑛 ∈ ℕ0
↦ ((((abs‘𝑤)↑2) / (!‘2)) · ((1 / (2 +
1))↑𝑛))) = (𝑛 ∈ ℕ0
↦ ((((abs‘𝑤)↑2) / (!‘2)) · ((1 / (2 +
1))↑𝑛))) |
| 117 | | 2nn 9152 |
. . . . . . . . . . . . . . . . . . . 20
⊢ 2 ∈
ℕ |
| 118 | 117 | a1i 9 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → 2 ∈
ℕ) |
| 119 | | 1red 8041 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → 1 ∈
ℝ) |
| 120 | | simpr 110 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘𝑤) <
1) |
| 121 | 48, 119, 120 | ltled 8145 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘𝑤) ≤
1) |
| 122 | 77, 115, 116, 118, 52, 121 | eftlub 11855 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘Σ𝑘 ∈
(ℤ≥‘2)((𝑛 ∈ ℕ0 ↦ ((𝑤↑𝑛) / (!‘𝑛)))‘𝑘)) ≤ (((abs‘𝑤)↑2) · ((2 + 1) / ((!‘2)
· 2)))) |
| 123 | 114, 122 | eqbrtrrd 4057 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘𝑤) ·
(abs‘((((exp‘𝑤)
− 1) / 𝑤) −
1))) ≤ (((abs‘𝑤)↑2) · ((2 + 1) / ((!‘2)
· 2)))) |
| 124 | | df-3 9050 |
. . . . . . . . . . . . . . . . . . 19
⊢ 3 = (2 +
1) |
| 125 | | fac2 10823 |
. . . . . . . . . . . . . . . . . . . . 21
⊢
(!‘2) = 2 |
| 126 | 125 | oveq1i 5932 |
. . . . . . . . . . . . . . . . . . . 20
⊢
((!‘2) · 2) = (2 · 2) |
| 127 | | 2t2e4 9145 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (2
· 2) = 4 |
| 128 | 126, 127 | eqtr2i 2218 |
. . . . . . . . . . . . . . . . . . 19
⊢ 4 =
((!‘2) · 2) |
| 129 | 124, 128 | oveq12i 5934 |
. . . . . . . . . . . . . . . . . 18
⊢ (3 / 4) =
((2 + 1) / ((!‘2) · 2)) |
| 130 | 129 | oveq2i 5933 |
. . . . . . . . . . . . . . . . 17
⊢
(((abs‘𝑤)↑2) · (3 / 4)) =
(((abs‘𝑤)↑2)
· ((2 + 1) / ((!‘2) · 2))) |
| 131 | 123, 130 | breqtrrdi 4075 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘𝑤) ·
(abs‘((((exp‘𝑤)
− 1) / 𝑤) −
1))) ≤ (((abs‘𝑤)↑2) · (3 / 4))) |
| 132 | 63 | a1i 9 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (3 / 4) ∈
ℝ) |
| 133 | 48 | sqge0d 10792 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → 0 ≤
((abs‘𝑤)↑2)) |
| 134 | | 1re 8025 |
. . . . . . . . . . . . . . . . . . . 20
⊢ 1 ∈
ℝ |
| 135 | | 3lt4 9163 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ 3 <
4 |
| 136 | | 4cn 9068 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ 4 ∈
ℂ |
| 137 | 136 | mulridi 8028 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (4
· 1) = 4 |
| 138 | 135, 137 | breqtrri 4060 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ 3 < (4
· 1) |
| 139 | | 4re 9067 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ 4 ∈
ℝ |
| 140 | | 4pos 9087 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ 0 <
4 |
| 141 | 139, 140 | pm3.2i 272 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (4 ∈
ℝ ∧ 0 < 4) |
| 142 | | ltdivmul 8903 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((3
∈ ℝ ∧ 1 ∈ ℝ ∧ (4 ∈ ℝ ∧ 0 < 4))
→ ((3 / 4) < 1 ↔ 3 < (4 · 1))) |
| 143 | 60, 134, 141, 142 | mp3an 1348 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((3 / 4)
< 1 ↔ 3 < (4 · 1)) |
| 144 | 138, 143 | mpbir 146 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (3 / 4)
< 1 |
| 145 | 63, 134, 144 | ltleii 8129 |
. . . . . . . . . . . . . . . . . . 19
⊢ (3 / 4)
≤ 1 |
| 146 | 145 | a1i 9 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (3 / 4) ≤
1) |
| 147 | 132, 119,
59, 133, 146 | lemul2ad 8967 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(((abs‘𝑤)↑2)
· (3 / 4)) ≤ (((abs‘𝑤)↑2) · 1)) |
| 148 | 48 | recnd 8055 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘𝑤) ∈
ℂ) |
| 149 | 148 | sqcld 10763 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘𝑤)↑2)
∈ ℂ) |
| 150 | 149 | mulridd 8043 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(((abs‘𝑤)↑2)
· 1) = ((abs‘𝑤)↑2)) |
| 151 | 147, 150 | breqtrd 4059 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(((abs‘𝑤)↑2)
· (3 / 4)) ≤ ((abs‘𝑤)↑2)) |
| 152 | 58, 65, 59, 131, 151 | letrd 8150 |
. . . . . . . . . . . . . . 15
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘𝑤) ·
(abs‘((((exp‘𝑤)
− 1) / 𝑤) −
1))) ≤ ((abs‘𝑤)↑2)) |
| 153 | 148 | sqvald 10762 |
. . . . . . . . . . . . . . 15
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘𝑤)↑2) =
((abs‘𝑤) ·
(abs‘𝑤))) |
| 154 | 152, 153 | breqtrd 4059 |
. . . . . . . . . . . . . 14
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘𝑤) ·
(abs‘((((exp‘𝑤)
− 1) / 𝑤) −
1))) ≤ ((abs‘𝑤)
· (abs‘𝑤))) |
| 155 | | absgt0ap 11264 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑤 ∈ ℂ → (𝑤 # 0 ↔ 0 <
(abs‘𝑤))) |
| 156 | 155 | ad2antrr 488 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → (𝑤 # 0 ↔ 0 <
(abs‘𝑤))) |
| 157 | 53, 156 | mpbid 147 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) → 0 <
(abs‘𝑤)) |
| 158 | 48, 157 | elrpd 9768 |
. . . . . . . . . . . . . . 15
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘𝑤) ∈
ℝ+) |
| 159 | 57, 48, 158 | lemul2d 9816 |
. . . . . . . . . . . . . 14
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
((abs‘((((exp‘𝑤) − 1) / 𝑤) − 1)) ≤ (abs‘𝑤) ↔ ((abs‘𝑤) ·
(abs‘((((exp‘𝑤)
− 1) / 𝑤) −
1))) ≤ ((abs‘𝑤)
· (abs‘𝑤)))) |
| 160 | 154, 159 | mpbird 167 |
. . . . . . . . . . . . 13
⊢ (((𝑤 ∈ ℂ ∧ 𝑤 # 0) ∧ (abs‘𝑤) < 1) →
(abs‘((((exp‘𝑤)
− 1) / 𝑤) − 1))
≤ (abs‘𝑤)) |
| 161 | 160 | ad2ant2l 508 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
(abs‘((((exp‘𝑤)
− 1) / 𝑤) − 1))
≤ (abs‘𝑤)) |
| 162 | | simprl 529 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
(abs‘𝑤) < 𝑥) |
| 163 | 42, 44, 46, 161, 162 | lelttrd 8151 |
. . . . . . . . . . 11
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
(abs‘((((exp‘𝑤)
− 1) / 𝑤) − 1))
< 𝑥) |
| 164 | 39, 163 | eqbrtrd 4055 |
. . . . . . . . . 10
⊢ (((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) ∧
((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1)) →
(abs‘(((𝑧 ∈
{𝑢 ∈ ℂ ∣
𝑢 # 0} ↦
(((exp‘𝑧) − 1)
/ 𝑧))‘𝑤) − 1)) < 𝑥) |
| 165 | 164 | ex 115 |
. . . . . . . . 9
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
(((abs‘𝑤) < 𝑥 ∧ (abs‘𝑤) < 1) →
(abs‘(((𝑧 ∈
{𝑢 ∈ ℂ ∣
𝑢 # 0} ↦
(((exp‘𝑧) − 1)
/ 𝑧))‘𝑤) − 1)) < 𝑥)) |
| 166 | 24, 165 | sylbid 150 |
. . . . . . . 8
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
((abs‘(𝑤 − 0))
< inf({𝑥, 1}, ℝ,
< ) → (abs‘(((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧))‘𝑤) − 1)) < 𝑥)) |
| 167 | 166 | adantld 278 |
. . . . . . 7
⊢ ((𝑥 ∈ ℝ+
∧ (𝑤 ∈ ℂ
∧ 𝑤 # 0)) →
((𝑤 # 0 ∧
(abs‘(𝑤 − 0))
< inf({𝑥, 1}, ℝ,
< )) → (abs‘(((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧))‘𝑤) − 1)) < 𝑥)) |
| 168 | 13, 167 | sylan2b 287 |
. . . . . 6
⊢ ((𝑥 ∈ ℝ+
∧ 𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0}) → ((𝑤 # 0 ∧ (abs‘(𝑤 − 0)) < inf({𝑥, 1}, ℝ, < )) →
(abs‘(((𝑧 ∈
{𝑢 ∈ ℂ ∣
𝑢 # 0} ↦
(((exp‘𝑧) − 1)
/ 𝑧))‘𝑤) − 1)) < 𝑥)) |
| 169 | 168 | ralrimiva 2570 |
. . . . 5
⊢ (𝑥 ∈ ℝ+
→ ∀𝑤 ∈
{𝑢 ∈ ℂ ∣
𝑢 # 0} ((𝑤 # 0 ∧ (abs‘(𝑤 − 0)) < inf({𝑥, 1}, ℝ, < )) →
(abs‘(((𝑧 ∈
{𝑢 ∈ ℂ ∣
𝑢 # 0} ↦
(((exp‘𝑧) − 1)
/ 𝑧))‘𝑤) − 1)) < 𝑥)) |
| 170 | | brimralrspcev 4092 |
. . . . 5
⊢
((inf({𝑥, 1},
ℝ, < ) ∈ ℝ+ ∧ ∀𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ((𝑤 # 0 ∧ (abs‘(𝑤 − 0)) < inf({𝑥, 1}, ℝ, < )) →
(abs‘(((𝑧 ∈
{𝑢 ∈ ℂ ∣
𝑢 # 0} ↦
(((exp‘𝑧) − 1)
/ 𝑧))‘𝑤) − 1)) < 𝑥)) → ∃𝑦 ∈ ℝ+
∀𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ((𝑤 # 0 ∧ (abs‘(𝑤 − 0)) < 𝑦) → (abs‘(((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧))‘𝑤) − 1)) < 𝑥)) |
| 171 | 11, 169, 170 | syl2anc 411 |
. . . 4
⊢ (𝑥 ∈ ℝ+
→ ∃𝑦 ∈
ℝ+ ∀𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ((𝑤 # 0 ∧ (abs‘(𝑤 − 0)) < 𝑦) → (abs‘(((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧))‘𝑤) − 1)) < 𝑥)) |
| 172 | 171 | rgen 2550 |
. . 3
⊢
∀𝑥 ∈
ℝ+ ∃𝑦 ∈ ℝ+ ∀𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ((𝑤 # 0 ∧ (abs‘(𝑤 − 0)) < 𝑦) → (abs‘(((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧))‘𝑤) − 1)) < 𝑥) |
| 173 | | elrabi 2917 |
. . . . . . . . . 10
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → 𝑧 ∈ ℂ) |
| 174 | | efcl 11829 |
. . . . . . . . . 10
⊢ (𝑧 ∈ ℂ →
(exp‘𝑧) ∈
ℂ) |
| 175 | 173, 174 | syl 14 |
. . . . . . . . 9
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → (exp‘𝑧) ∈ ℂ) |
| 176 | | 1cnd 8042 |
. . . . . . . . 9
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → 1 ∈
ℂ) |
| 177 | 175, 176 | subcld 8337 |
. . . . . . . 8
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → ((exp‘𝑧) − 1) ∈ ℂ) |
| 178 | | breq1 4036 |
. . . . . . . . . 10
⊢ (𝑢 = 𝑧 → (𝑢 # 0 ↔ 𝑧 # 0)) |
| 179 | 178 | elrab 2920 |
. . . . . . . . 9
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↔ (𝑧 ∈ ℂ ∧ 𝑧 # 0)) |
| 180 | 179 | simprbi 275 |
. . . . . . . 8
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → 𝑧 # 0) |
| 181 | 177, 173,
180 | divclapd 8817 |
. . . . . . 7
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → (((exp‘𝑧) − 1) / 𝑧) ∈ ℂ) |
| 182 | 25, 181 | fmpti 5714 |
. . . . . 6
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)):{𝑢 ∈ ℂ ∣ 𝑢 # 0}⟶ℂ |
| 183 | 182 | a1i 9 |
. . . . 5
⊢ (⊤
→ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)):{𝑢 ∈ ℂ ∣ 𝑢 # 0}⟶ℂ) |
| 184 | | apsscn 8674 |
. . . . . 6
⊢ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ⊆
ℂ |
| 185 | 184 | a1i 9 |
. . . . 5
⊢ (⊤
→ {𝑢 ∈ ℂ
∣ 𝑢 # 0} ⊆
ℂ) |
| 186 | | 0cnd 8019 |
. . . . 5
⊢ (⊤
→ 0 ∈ ℂ) |
| 187 | 183, 185,
186 | ellimc3ap 14897 |
. . . 4
⊢ (⊤
→ (1 ∈ ((𝑧 ∈
{𝑢 ∈ ℂ ∣
𝑢 # 0} ↦
(((exp‘𝑧) − 1)
/ 𝑧)) limℂ
0) ↔ (1 ∈ ℂ ∧ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ+
∀𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ((𝑤 # 0 ∧ (abs‘(𝑤 − 0)) < 𝑦) → (abs‘(((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧))‘𝑤) − 1)) < 𝑥)))) |
| 188 | 187 | mptru 1373 |
. . 3
⊢ (1 ∈
((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)) limℂ 0)
↔ (1 ∈ ℂ ∧ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ+
∀𝑤 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ((𝑤 # 0 ∧ (abs‘(𝑤 − 0)) < 𝑦) → (abs‘(((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧))‘𝑤) − 1)) < 𝑥))) |
| 189 | 8, 172, 188 | mpbir2an 944 |
. 2
⊢ 1 ∈
((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)) limℂ
0) |
| 190 | 2 | cntoptopon 14768 |
. . . . 5
⊢
(MetOpen‘(abs ∘ − )) ∈
(TopOn‘ℂ) |
| 191 | 190 | toponrestid 14257 |
. . . 4
⊢
(MetOpen‘(abs ∘ − )) = ((MetOpen‘(abs ∘
− )) ↾t ℂ) |
| 192 | 173 | subid1d 8326 |
. . . . . . 7
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → (𝑧 − 0) = 𝑧) |
| 193 | 192 | oveq2d 5938 |
. . . . . 6
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → (((exp‘𝑧) − (exp‘0)) / (𝑧 − 0)) =
(((exp‘𝑧) −
(exp‘0)) / 𝑧)) |
| 194 | | ef0 11837 |
. . . . . . . 8
⊢
(exp‘0) = 1 |
| 195 | 194 | oveq2i 5933 |
. . . . . . 7
⊢
((exp‘𝑧)
− (exp‘0)) = ((exp‘𝑧) − 1) |
| 196 | 195 | oveq1i 5932 |
. . . . . 6
⊢
(((exp‘𝑧)
− (exp‘0)) / 𝑧)
= (((exp‘𝑧) −
1) / 𝑧) |
| 197 | 193, 196 | eqtr2di 2246 |
. . . . 5
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} → (((exp‘𝑧) − 1) / 𝑧) = (((exp‘𝑧) − (exp‘0)) / (𝑧 − 0))) |
| 198 | 197 | mpteq2ia 4119 |
. . . 4
⊢ (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)) = (𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − (exp‘0)) / (𝑧 − 0))) |
| 199 | | ssidd 3204 |
. . . 4
⊢ (⊤
→ ℂ ⊆ ℂ) |
| 200 | | eff 11828 |
. . . . 5
⊢
exp:ℂ⟶ℂ |
| 201 | 200 | a1i 9 |
. . . 4
⊢ (⊤
→ exp:ℂ⟶ℂ) |
| 202 | 191, 2, 198, 199, 201, 199 | eldvap 14918 |
. . 3
⊢ (⊤
→ (0(ℂ D exp)1 ↔ (0 ∈ ((int‘(MetOpen‘(abs
∘ − )))‘ℂ) ∧ 1 ∈ ((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)) limℂ
0)))) |
| 203 | 202 | mptru 1373 |
. 2
⊢
(0(ℂ D exp)1 ↔ (0 ∈ ((int‘(MetOpen‘(abs
∘ − )))‘ℂ) ∧ 1 ∈ ((𝑧 ∈ {𝑢 ∈ ℂ ∣ 𝑢 # 0} ↦ (((exp‘𝑧) − 1) / 𝑧)) limℂ
0))) |
| 204 | 7, 189, 203 | mpbir2an 944 |
1
⊢ 0(ℂ
D exp)1 |