Step | Hyp | Ref
| Expression |
1 | | simp2 1062 |
. . . . . . . 8
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐹:𝐴⟶ℂ) |
2 | | ffn 6045 |
. . . . . . . 8
⊢ (𝐹:𝐴⟶ℂ → 𝐹 Fn 𝐴) |
3 | 1, 2 | syl 17 |
. . . . . . 7
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐹 Fn 𝐴) |
4 | | simp3 1063 |
. . . . . . . 8
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐺:𝐴⟶ℂ) |
5 | | ffn 6045 |
. . . . . . . 8
⊢ (𝐺:𝐴⟶ℂ → 𝐺 Fn 𝐴) |
6 | 4, 5 | syl 17 |
. . . . . . 7
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐺 Fn 𝐴) |
7 | | simp1 1061 |
. . . . . . 7
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐴 ∈ 𝑉) |
8 | | inidm 3822 |
. . . . . . 7
⊢ (𝐴 ∩ 𝐴) = 𝐴 |
9 | | eqidd 2623 |
. . . . . . 7
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) = (𝐹‘𝑥)) |
10 | | eqidd 2623 |
. . . . . . 7
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) = (𝐺‘𝑥)) |
11 | 3, 6, 7, 7, 8, 9, 10 | ofval 6906 |
. . . . . 6
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → ((𝐹 ∘𝑓 · 𝐺)‘𝑥) = ((𝐹‘𝑥) · (𝐺‘𝑥))) |
12 | 11 | eqeq1d 2624 |
. . . . 5
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (((𝐹 ∘𝑓 · 𝐺)‘𝑥) = 0 ↔ ((𝐹‘𝑥) · (𝐺‘𝑥)) = 0)) |
13 | 1 | ffvelrnda 6359 |
. . . . . 6
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) |
14 | 4 | ffvelrnda 6359 |
. . . . . 6
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) ∈ ℂ) |
15 | 13, 14 | mul0ord 10677 |
. . . . 5
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (((𝐹‘𝑥) · (𝐺‘𝑥)) = 0 ↔ ((𝐹‘𝑥) = 0 ∨ (𝐺‘𝑥) = 0))) |
16 | 12, 15 | bitrd 268 |
. . . 4
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (((𝐹 ∘𝑓 · 𝐺)‘𝑥) = 0 ↔ ((𝐹‘𝑥) = 0 ∨ (𝐺‘𝑥) = 0))) |
17 | 16 | pm5.32da 673 |
. . 3
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → ((𝑥 ∈ 𝐴 ∧ ((𝐹 ∘𝑓 · 𝐺)‘𝑥) = 0) ↔ (𝑥 ∈ 𝐴 ∧ ((𝐹‘𝑥) = 0 ∨ (𝐺‘𝑥) = 0)))) |
18 | 3, 6, 7, 7, 8 | offn 6908 |
. . . 4
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝐹 ∘𝑓 · 𝐺) Fn 𝐴) |
19 | | fniniseg 6338 |
. . . 4
⊢ ((𝐹 ∘𝑓
· 𝐺) Fn 𝐴 → (𝑥 ∈ (◡(𝐹 ∘𝑓 · 𝐺) “ {0}) ↔ (𝑥 ∈ 𝐴 ∧ ((𝐹 ∘𝑓 · 𝐺)‘𝑥) = 0))) |
20 | 18, 19 | syl 17 |
. . 3
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝑥 ∈ (◡(𝐹 ∘𝑓 · 𝐺) “ {0}) ↔ (𝑥 ∈ 𝐴 ∧ ((𝐹 ∘𝑓 · 𝐺)‘𝑥) = 0))) |
21 | | fniniseg 6338 |
. . . . . 6
⊢ (𝐹 Fn 𝐴 → (𝑥 ∈ (◡𝐹 “ {0}) ↔ (𝑥 ∈ 𝐴 ∧ (𝐹‘𝑥) = 0))) |
22 | 3, 21 | syl 17 |
. . . . 5
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝑥 ∈ (◡𝐹 “ {0}) ↔ (𝑥 ∈ 𝐴 ∧ (𝐹‘𝑥) = 0))) |
23 | | fniniseg 6338 |
. . . . . 6
⊢ (𝐺 Fn 𝐴 → (𝑥 ∈ (◡𝐺 “ {0}) ↔ (𝑥 ∈ 𝐴 ∧ (𝐺‘𝑥) = 0))) |
24 | 6, 23 | syl 17 |
. . . . 5
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝑥 ∈ (◡𝐺 “ {0}) ↔ (𝑥 ∈ 𝐴 ∧ (𝐺‘𝑥) = 0))) |
25 | 22, 24 | orbi12d 746 |
. . . 4
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → ((𝑥 ∈ (◡𝐹 “ {0}) ∨ 𝑥 ∈ (◡𝐺 “ {0})) ↔ ((𝑥 ∈ 𝐴 ∧ (𝐹‘𝑥) = 0) ∨ (𝑥 ∈ 𝐴 ∧ (𝐺‘𝑥) = 0)))) |
26 | | elun 3753 |
. . . 4
⊢ (𝑥 ∈ ((◡𝐹 “ {0}) ∪ (◡𝐺 “ {0})) ↔ (𝑥 ∈ (◡𝐹 “ {0}) ∨ 𝑥 ∈ (◡𝐺 “ {0}))) |
27 | | andi 911 |
. . . 4
⊢ ((𝑥 ∈ 𝐴 ∧ ((𝐹‘𝑥) = 0 ∨ (𝐺‘𝑥) = 0)) ↔ ((𝑥 ∈ 𝐴 ∧ (𝐹‘𝑥) = 0) ∨ (𝑥 ∈ 𝐴 ∧ (𝐺‘𝑥) = 0))) |
28 | 25, 26, 27 | 3bitr4g 303 |
. . 3
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝑥 ∈ ((◡𝐹 “ {0}) ∪ (◡𝐺 “ {0})) ↔ (𝑥 ∈ 𝐴 ∧ ((𝐹‘𝑥) = 0 ∨ (𝐺‘𝑥) = 0)))) |
29 | 17, 20, 28 | 3bitr4d 300 |
. 2
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝑥 ∈ (◡(𝐹 ∘𝑓 · 𝐺) “ {0}) ↔ 𝑥 ∈ ((◡𝐹 “ {0}) ∪ (◡𝐺 “ {0})))) |
30 | 29 | eqrdv 2620 |
1
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (◡(𝐹 ∘𝑓 · 𝐺) “ {0}) = ((◡𝐹 “ {0}) ∪ (◡𝐺 “ {0}))) |