| Step | Hyp | Ref
| Expression |
| 1 | | 1cnd 8042 |
. . 3
⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ 𝑁 = 0) → 1 ∈
ℂ) |
| 2 | | simp1 999 |
. . . . . . 7
⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) → 𝐴 ∈ ℂ) |
| 3 | | nnuz 9637 |
. . . . . . . 8
⊢ ℕ =
(ℤ≥‘1) |
| 4 | | 1zzd 9353 |
. . . . . . . 8
⊢ (𝐴 ∈ ℂ → 1 ∈
ℤ) |
| 5 | | fvconst2g 5776 |
. . . . . . . . 9
⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℕ) →
((ℕ × {𝐴})‘𝑥) = 𝐴) |
| 6 | | simpl 109 |
. . . . . . . . 9
⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℕ) → 𝐴 ∈
ℂ) |
| 7 | 5, 6 | eqeltrd 2273 |
. . . . . . . 8
⊢ ((𝐴 ∈ ℂ ∧ 𝑥 ∈ ℕ) →
((ℕ × {𝐴})‘𝑥) ∈ ℂ) |
| 8 | | mulcl 8006 |
. . . . . . . . 9
⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑥 · 𝑦) ∈ ℂ) |
| 9 | 8 | adantl 277 |
. . . . . . . 8
⊢ ((𝐴 ∈ ℂ ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ)) → (𝑥 · 𝑦) ∈ ℂ) |
| 10 | 3, 4, 7, 9 | seqf 10556 |
. . . . . . 7
⊢ (𝐴 ∈ ℂ → seq1(
· , (ℕ × {𝐴})):ℕ⟶ℂ) |
| 11 | 2, 10 | syl 14 |
. . . . . 6
⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) → seq1( · ,
(ℕ × {𝐴})):ℕ⟶ℂ) |
| 12 | 11 | ad2antrr 488 |
. . . . 5
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ 0 < 𝑁) → seq1( · , (ℕ ×
{𝐴})):ℕ⟶ℂ) |
| 13 | | simp2 1000 |
. . . . . . 7
⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) → 𝑁 ∈ ℤ) |
| 14 | 13 | ad2antrr 488 |
. . . . . 6
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ 0 < 𝑁) → 𝑁 ∈ ℤ) |
| 15 | | simpr 110 |
. . . . . 6
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ 0 < 𝑁) → 0 < 𝑁) |
| 16 | | elnnz 9336 |
. . . . . 6
⊢ (𝑁 ∈ ℕ ↔ (𝑁 ∈ ℤ ∧ 0 <
𝑁)) |
| 17 | 14, 15, 16 | sylanbrc 417 |
. . . . 5
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ 0 < 𝑁) → 𝑁 ∈ ℕ) |
| 18 | 12, 17 | ffvelcdmd 5698 |
. . . 4
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ 0 < 𝑁) → (seq1( · , (ℕ ×
{𝐴}))‘𝑁) ∈
ℂ) |
| 19 | 11 | ad2antrr 488 |
. . . . . 6
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → seq1( · , (ℕ ×
{𝐴})):ℕ⟶ℂ) |
| 20 | 13 | ad2antrr 488 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → 𝑁 ∈ ℤ) |
| 21 | 20 | znegcld 9450 |
. . . . . . 7
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → -𝑁 ∈ ℤ) |
| 22 | | simpr 110 |
. . . . . . . . . . 11
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → ¬ 0 < 𝑁) |
| 23 | | simplr 528 |
. . . . . . . . . . . 12
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → ¬ 𝑁 = 0) |
| 24 | | eqcom 2198 |
. . . . . . . . . . . 12
⊢ (𝑁 = 0 ↔ 0 = 𝑁) |
| 25 | 23, 24 | sylnib 677 |
. . . . . . . . . . 11
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → ¬ 0 = 𝑁) |
| 26 | | ioran 753 |
. . . . . . . . . . 11
⊢ (¬ (0
< 𝑁 ∨ 0 = 𝑁) ↔ (¬ 0 < 𝑁 ∧ ¬ 0 = 𝑁)) |
| 27 | 22, 25, 26 | sylanbrc 417 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → ¬ (0 < 𝑁 ∨ 0 = 𝑁)) |
| 28 | | 0zd 9338 |
. . . . . . . . . . 11
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → 0 ∈ ℤ) |
| 29 | | zleloe 9373 |
. . . . . . . . . . 11
⊢ ((0
∈ ℤ ∧ 𝑁
∈ ℤ) → (0 ≤ 𝑁 ↔ (0 < 𝑁 ∨ 0 = 𝑁))) |
| 30 | 28, 20, 29 | syl2anc 411 |
. . . . . . . . . 10
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → (0 ≤ 𝑁 ↔ (0 < 𝑁 ∨ 0 = 𝑁))) |
| 31 | 27, 30 | mtbird 674 |
. . . . . . . . 9
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → ¬ 0 ≤ 𝑁) |
| 32 | | zltnle 9372 |
. . . . . . . . . 10
⊢ ((𝑁 ∈ ℤ ∧ 0 ∈
ℤ) → (𝑁 < 0
↔ ¬ 0 ≤ 𝑁)) |
| 33 | 20, 28, 32 | syl2anc 411 |
. . . . . . . . 9
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → (𝑁 < 0 ↔ ¬ 0 ≤ 𝑁)) |
| 34 | 31, 33 | mpbird 167 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → 𝑁 < 0) |
| 35 | 20 | zred 9448 |
. . . . . . . . 9
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → 𝑁 ∈ ℝ) |
| 36 | 35 | lt0neg1d 8542 |
. . . . . . . 8
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → (𝑁 < 0 ↔ 0 < -𝑁)) |
| 37 | 34, 36 | mpbid 147 |
. . . . . . 7
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → 0 < -𝑁) |
| 38 | | elnnz 9336 |
. . . . . . 7
⊢ (-𝑁 ∈ ℕ ↔ (-𝑁 ∈ ℤ ∧ 0 <
-𝑁)) |
| 39 | 21, 37, 38 | sylanbrc 417 |
. . . . . 6
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → -𝑁 ∈ ℕ) |
| 40 | 19, 39 | ffvelcdmd 5698 |
. . . . 5
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → (seq1( · , (ℕ ×
{𝐴}))‘-𝑁) ∈
ℂ) |
| 41 | 2 | ad2antrr 488 |
. . . . . 6
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → 𝐴 ∈ ℂ) |
| 42 | | simpll3 1040 |
. . . . . . 7
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → (𝐴 # 0 ∨ 0 ≤ 𝑁)) |
| 43 | 31, 42 | ecased 1360 |
. . . . . 6
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → 𝐴 # 0) |
| 44 | 41, 43, 39 | exp3vallem 10632 |
. . . . 5
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → (seq1( · , (ℕ ×
{𝐴}))‘-𝑁) # 0) |
| 45 | 40, 44 | recclapd 8808 |
. . . 4
⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) ∧ ¬ 0 < 𝑁) → (1 / (seq1( · , (ℕ
× {𝐴}))‘-𝑁)) ∈
ℂ) |
| 46 | | 0zd 9338 |
. . . . 5
⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) → 0 ∈
ℤ) |
| 47 | | simpl2 1003 |
. . . . 5
⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) → 𝑁 ∈ ℤ) |
| 48 | | zdclt 9403 |
. . . . 5
⊢ ((0
∈ ℤ ∧ 𝑁
∈ ℤ) → DECID 0 < 𝑁) |
| 49 | 46, 47, 48 | syl2anc 411 |
. . . 4
⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) → DECID 0 <
𝑁) |
| 50 | 18, 45, 49 | ifcldadc 3590 |
. . 3
⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) ∧ ¬ 𝑁 = 0) → if(0 < 𝑁, (seq1( · , (ℕ × {𝐴}))‘𝑁), (1 / (seq1( · , (ℕ ×
{𝐴}))‘-𝑁))) ∈
ℂ) |
| 51 | | 0zd 9338 |
. . . 4
⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) → 0 ∈
ℤ) |
| 52 | | zdceq 9401 |
. . . 4
⊢ ((𝑁 ∈ ℤ ∧ 0 ∈
ℤ) → DECID 𝑁 = 0) |
| 53 | 13, 51, 52 | syl2anc 411 |
. . 3
⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) → DECID
𝑁 = 0) |
| 54 | 1, 50, 53 | ifcldadc 3590 |
. 2
⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) → if(𝑁 = 0, 1, if(0 < 𝑁, (seq1( · , (ℕ × {𝐴}))‘𝑁), (1 / (seq1( · , (ℕ ×
{𝐴}))‘-𝑁)))) ∈
ℂ) |
| 55 | | sneq 3633 |
. . . . . . . 8
⊢ (𝑥 = 𝐴 → {𝑥} = {𝐴}) |
| 56 | 55 | xpeq2d 4687 |
. . . . . . 7
⊢ (𝑥 = 𝐴 → (ℕ × {𝑥}) = (ℕ × {𝐴})) |
| 57 | 56 | seqeq3d 10547 |
. . . . . 6
⊢ (𝑥 = 𝐴 → seq1( · , (ℕ ×
{𝑥})) = seq1( · ,
(ℕ × {𝐴}))) |
| 58 | 57 | fveq1d 5560 |
. . . . 5
⊢ (𝑥 = 𝐴 → (seq1( · , (ℕ ×
{𝑥}))‘𝑦) = (seq1( · , (ℕ
× {𝐴}))‘𝑦)) |
| 59 | 57 | fveq1d 5560 |
. . . . . 6
⊢ (𝑥 = 𝐴 → (seq1( · , (ℕ ×
{𝑥}))‘-𝑦) = (seq1( · , (ℕ
× {𝐴}))‘-𝑦)) |
| 60 | 59 | oveq2d 5938 |
. . . . 5
⊢ (𝑥 = 𝐴 → (1 / (seq1( · , (ℕ
× {𝑥}))‘-𝑦)) = (1 / (seq1( · ,
(ℕ × {𝐴}))‘-𝑦))) |
| 61 | 58, 60 | ifeq12d 3580 |
. . . 4
⊢ (𝑥 = 𝐴 → if(0 < 𝑦, (seq1( · , (ℕ × {𝑥}))‘𝑦), (1 / (seq1( · , (ℕ ×
{𝑥}))‘-𝑦))) = if(0 < 𝑦, (seq1( · , (ℕ
× {𝐴}))‘𝑦), (1 / (seq1( · ,
(ℕ × {𝐴}))‘-𝑦)))) |
| 62 | 61 | ifeq2d 3579 |
. . 3
⊢ (𝑥 = 𝐴 → if(𝑦 = 0, 1, if(0 < 𝑦, (seq1( · , (ℕ × {𝑥}))‘𝑦), (1 / (seq1( · , (ℕ ×
{𝑥}))‘-𝑦)))) = if(𝑦 = 0, 1, if(0 < 𝑦, (seq1( · , (ℕ × {𝐴}))‘𝑦), (1 / (seq1( · , (ℕ ×
{𝐴}))‘-𝑦))))) |
| 63 | | eqeq1 2203 |
. . . 4
⊢ (𝑦 = 𝑁 → (𝑦 = 0 ↔ 𝑁 = 0)) |
| 64 | | breq2 4037 |
. . . . 5
⊢ (𝑦 = 𝑁 → (0 < 𝑦 ↔ 0 < 𝑁)) |
| 65 | | fveq2 5558 |
. . . . 5
⊢ (𝑦 = 𝑁 → (seq1( · , (ℕ ×
{𝐴}))‘𝑦) = (seq1( · , (ℕ
× {𝐴}))‘𝑁)) |
| 66 | | negeq 8219 |
. . . . . . 7
⊢ (𝑦 = 𝑁 → -𝑦 = -𝑁) |
| 67 | 66 | fveq2d 5562 |
. . . . . 6
⊢ (𝑦 = 𝑁 → (seq1( · , (ℕ ×
{𝐴}))‘-𝑦) = (seq1( · , (ℕ
× {𝐴}))‘-𝑁)) |
| 68 | 67 | oveq2d 5938 |
. . . . 5
⊢ (𝑦 = 𝑁 → (1 / (seq1( · , (ℕ
× {𝐴}))‘-𝑦)) = (1 / (seq1( · ,
(ℕ × {𝐴}))‘-𝑁))) |
| 69 | 64, 65, 68 | ifbieq12d 3587 |
. . . 4
⊢ (𝑦 = 𝑁 → if(0 < 𝑦, (seq1( · , (ℕ × {𝐴}))‘𝑦), (1 / (seq1( · , (ℕ ×
{𝐴}))‘-𝑦))) = if(0 < 𝑁, (seq1( · , (ℕ
× {𝐴}))‘𝑁), (1 / (seq1( · ,
(ℕ × {𝐴}))‘-𝑁)))) |
| 70 | 63, 69 | ifbieq2d 3585 |
. . 3
⊢ (𝑦 = 𝑁 → if(𝑦 = 0, 1, if(0 < 𝑦, (seq1( · , (ℕ × {𝐴}))‘𝑦), (1 / (seq1( · , (ℕ ×
{𝐴}))‘-𝑦)))) = if(𝑁 = 0, 1, if(0 < 𝑁, (seq1( · , (ℕ × {𝐴}))‘𝑁), (1 / (seq1( · , (ℕ ×
{𝐴}))‘-𝑁))))) |
| 71 | | df-exp 10631 |
. . 3
⊢ ↑ =
(𝑥 ∈ ℂ, 𝑦 ∈ ℤ ↦ if(𝑦 = 0, 1, if(0 < 𝑦, (seq1( · , (ℕ
× {𝑥}))‘𝑦), (1 / (seq1( · ,
(ℕ × {𝑥}))‘-𝑦))))) |
| 72 | 62, 70, 71 | ovmpog 6057 |
. 2
⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ if(𝑁 = 0, 1, if(0 < 𝑁, (seq1( · , (ℕ
× {𝐴}))‘𝑁), (1 / (seq1( · ,
(ℕ × {𝐴}))‘-𝑁)))) ∈ ℂ) → (𝐴↑𝑁) = if(𝑁 = 0, 1, if(0 < 𝑁, (seq1( · , (ℕ × {𝐴}))‘𝑁), (1 / (seq1( · , (ℕ ×
{𝐴}))‘-𝑁))))) |
| 73 | 54, 72 | syld3an3 1294 |
1
⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℤ ∧ (𝐴 # 0 ∨ 0 ≤ 𝑁)) → (𝐴↑𝑁) = if(𝑁 = 0, 1, if(0 < 𝑁, (seq1( · , (ℕ × {𝐴}))‘𝑁), (1 / (seq1( · , (ℕ ×
{𝐴}))‘-𝑁))))) |