Proof of Theorem eloprabg
| Step | Hyp | Ref
| Expression |
| 1 | | opex 1893 |
. 2
⊢ 〈〈A, B〉,
C〉 ∈ V |
| 2 | | cleq1 1107 |
. . . . . . . . . 10
⊢ (w =
〈〈A, B〉, C〉
→ (w = 〈〈x, y〉,
z〉 ↔ 〈〈A, B〉,
C〉 = 〈〈x, y〉,
z〉)) |
| 3 | | cleqcom 1103 |
. . . . . . . . . 10
⊢ (〈〈A, B〉,
C〉 = 〈〈x, y〉,
z〉 ↔ 〈〈x, y〉,
z〉 = 〈〈A, B〉,
C〉) |
| 4 | 2, 3 | syl6bb 414 |
. . . . . . . . 9
⊢ (w =
〈〈A, B〉, C〉
→ (w = 〈〈x, y〉,
z〉 ↔ 〈〈x, y〉,
z〉 = 〈〈A, B〉,
C〉)) |
| 5 | | visset 1350 |
. . . . . . . . . . 11
⊢ x
∈ V |
| 6 | | visset 1350 |
. . . . . . . . . . 11
⊢ y
∈ V |
| 7 | | visset 1350 |
. . . . . . . . . . 11
⊢ z
∈ V |
| 8 | 5, 6, 7 | otthg 1900 |
. . . . . . . . . 10
⊢ ((B
∈ R ∧ C ∈ S)
→ (〈〈x, y〉, z〉
= 〈〈A, B〉, C〉
↔ (x = A ∧ y =
B ∧ z = C))) |
| 9 | 8 | 3adant1 597 |
. . . . . . . . 9
⊢ ((A
∈ D ∧ B ∈ R ∧
C ∈ S) → (〈〈x, y〉,
z〉 = 〈〈A, B〉,
C〉 ↔ (x = A ∧
y = B
∧ z = C))) |
| 10 | 4, 9 | sylan9bbr 419 |
. . . . . . . 8
⊢ (((<3ONT COLOR="#CC33CC">A
∈ D ∧ B ∈ R ∧
C ∈ S) ∧ w =
〈〈A, B〉, C〉) → (w = 〈〈x, y〉,
z〉 ↔ (x = A ∧
y = B
∧ z = C))) |
| 11 | 10 | anbi1d 469 |
. . . . . . 7
⊢ (((A
∈ D ∧ B ∈ R ∧
C ∈ S) ∧ w =
〈〈A, B〉, C〉) → ((w = 〈〈x, y〉,
z〉 ∧ φ) ↔ ((x = A ∧
y = B
∧ z = C) ∧ φ))) |
| 12 | | eloprabg.1 |
. . . . . . . . 9
⊢ (x =
A → (φ ↔ ψ)) |
| 13 | | eloprabg.2 |
. . . . . . . . 9
⊢ (y =
B → (ψ ↔ χ)) |
| 14 | | eloprabg.3 |
. . . . . . . . 9
⊢ (z =
C → (χ ↔ θ)) |
| 15 | 12, 13, 14 | syl3an9b 634 |
. . . . . . . 8
⊢ ((x =
A ∧ y = B ∧
z = C)
→ (φ ↔ θ)) |
| 16 | 15 | pm5.32i 489 |
. . . . . . 7
⊢ (((x =
A ∧ y = B ∧
z = C)
∧ φ) ↔ ((x = A ∧
y = B
∧ z = C) ∧ θ)) |
| 17 | 11, 16 | syl6bb 414 |
. . . . . 6
⊢ (((A
∈ D ∧ B ∈ R ∧
C ∈ S) ∧ w =
〈〈A, B〉, C〉) → ((w = 〈〈x, y〉,
z〉 ∧ φ) ↔ ((x = A ∧
y = B
∧ z = C) ∧ θ))) |
| 18 | 17 | bi3exdv 939 |
. . . . 5
⊢ (((A
∈ D ∧ B ∈ R ∧
C ∈ S) ∧ w =
〈〈A, B〉, C〉) → (∃x∃y∃z(w =
〈〈x, y〉, z〉
∧ φ) ↔ ∃x∃y∃z((x = A ∧ y =
B ∧ z = C) ∧
θ))) |
| 19 | | eleq1 1149 |
. . . . . . 7
⊢ (w =
〈〈A, B〉, C〉
→ (w ∈ {〈〈x, y〉,
z〉∣φ} ↔ 〈〈A, B〉,
C〉 ∈ {〈〈x, y〉,
z〉∣φ})) |
| 20 | | df-oprab 3004 |
. . . . . . . . 9
⊢ {〈〈x, y〉,
z〉∣φ} = {w∣∃x∃y∃z(w =
〈〈x, y〉, z〉
∧ φ)} |
| 21 | 20 | eleq2i 1153 |
. . . . . . . 8
⊢ (w
∈ {〈〈x, y〉, z〉∣φ} ↔ w ∈ {w∣∃x∃y∃z(w =
〈〈x, y〉, z〉
∧ φ)}) |
| 22 | | abid 1094 |
. . . . . . . 8
⊢ (w
∈ {w∣∃x∃y∃z(w =
〈〈x, y〉, z〉
∧ φ)} ↔ ∃x∃y∃z(w =
〈〈x, y〉, z〉
∧ φ)) |
| 23 | 21, 22 | bitr2 152 |
. . . . . . 7
⊢ (∃x∃y∃z(w =
〈〈x, y〉, z〉
∧ φ) ↔ w ∈ {〈〈x, y〉,
z〉∣φ}) |
| 24 | 19, 23 | syl5bb 410 |
. . . . . 6
⊢ (w =
〈〈A, B〉, C〉
→ (∃x∃y∃z(w =
〈〈x, y〉, z〉
∧ φ) ↔ 〈〈A, B〉,
C〉 ∈ {〈〈x, y〉,
z〉∣φ})) |
| 25 | 24 | adantl 305 |
. . . . 5
⊢ (((A
∈ D ∧ B ∈ R ∧
C ∈ S) ∧ w =
〈〈A, B〉, C〉) → (∃x∃y∃z(w =
〈〈x, y〉, z〉
∧ φ) ↔ 〈〈A, B〉,
C〉 ∈ {〈〈x, y〉,
z〉∣φ})) |
| 26 | | elex 1356 |
. . . . . . . . . 10
⊢ (A
∈ D → ∃x x = A) |
| 27 | | elex 1356 |
. . . . . . . . . 10
⊢ (B
∈ R → ∃y y = B) |
| 28 | | elex 1356 |
. . . . . . . . . 10
⊢ (C
∈ S → ∃z z = C) |
| 29 | 26, 27, 28 | im3an 605 |
. . . . . . . . 9
⊢ ((A
∈ D ∧ B ∈ R ∧
C ∈ S) → (∃x x = A ∧ ∃y
y = B
∧ ∃z z = C)) |
| 30 | | eeeanv 981 |
. . . . . . . . 9
⊢ (∃x∃y∃z(x = A ∧ y =
B ∧ z = C) ↔
(∃x x = A ∧
∃y y = B ∧
∃z z = C)) |
| 31 | 29, 30 | sylibr 175 |
. . . . . . . 8
⊢ ((A
∈ D ∧ B ∈ R ∧
C ∈ S) → ∃x∃y∃z(x = A ∧ y =
B ∧ z = C)) |
| 32 | 31 | biantrurd 546 |
. . . . . . 7
⊢ ((A
∈ D ∧ B ∈ R ∧
C ∈ S) → (θ ↔ (∃x∃y∃z(x = A ∧ y =
B ∧ z = C) ∧
θ))) |
| 33 | | 19.41vvv 965 |
. . . . . . 7
⊢ (∃x∃y∃z((x = A ∧ y =
B ∧ z = C) ∧
θ) ↔ (∃x∃y∃z(x = A ∧ y =
B ∧ z = C) ∧
θ)) |
| 34 | 32, 33 | syl6rbbr 417 |
. . . . . 6
⊢ ((A
∈ D ∧ B ∈ R ∧
C ∈ S) → (∃x∃y∃z((x = A ∧ y =
B ∧ z = C) ∧
θ) ↔ θ)) |
| 35 | 34 | adantr 306 |
. . . . 5
⊢ (((A
∈ D ∧ B ∈ R ∧
C ∈ S) ∧ w =
〈〈A, B〉, C〉) → (∃x∃y∃z((x = A ∧ y =
B ∧ z = C) ∧
θ) ↔ θ)) |
| 36 | 18, 25, 35 | 3bitr3d 423 |
. . . 4
⊢ (((A
∈ D ∧ B ∈ R ∧
C ∈ S) ∧ w =
〈〈A, B〉, C〉) → (〈〈A, B〉,
C〉 ∈ {〈〈x, y〉,
z〉∣φ} ↔ θ)) |
| 37 | 36 | exp 291 |
. . 3
⊢ ((A
∈ D ∧ B ∈ R ∧
C ∈ S) → (w =
〈〈A, B〉, C〉
→ (〈〈A, B〉, C〉
∈ {〈〈x, y〉, z〉∣φ} ↔ θ))) |
| 38 | 37 | com12 13 |
. 2
⊢ (w =
〈〈A, B〉, C〉
→ ((A ∈ D ∧ B ∈
R ∧ C ∈ S)
→ (〈〈A, B〉, C〉
∈ {〈〈x, y〉, z〉∣φ} ↔ θ))) |
| 39 | 1, 38 | vtocle 1391 |
1
⊢ ((A
∈ D ∧ B ∈ R ∧
C ∈ S) → (〈〈A, B〉,
C〉 ∈ {〈〈x, y〉,
z〉∣φ} ↔ θ)) |