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Mirrors > Home > ILE Home > Th. List > elovmpo | GIF version |
Description: Utility lemma for two-parameter classes. (Contributed by Stefan O'Rear, 21-Jan-2015.) |
Ref | Expression |
---|---|
elovmpo.d | ⊢ 𝐷 = (𝑎 ∈ 𝐴, 𝑏 ∈ 𝐵 ↦ 𝐶) |
elovmpo.c | ⊢ 𝐶 ∈ V |
elovmpo.e | ⊢ ((𝑎 = 𝑋 ∧ 𝑏 = 𝑌) → 𝐶 = 𝐸) |
Ref | Expression |
---|---|
elovmpo | ⊢ (𝐹 ∈ (𝑋𝐷𝑌) ↔ (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵 ∧ 𝐹 ∈ 𝐸)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elovmpo.d | . . . 4 ⊢ 𝐷 = (𝑎 ∈ 𝐴, 𝑏 ∈ 𝐵 ↦ 𝐶) | |
2 | 1 | elmpocl 6018 | . . 3 ⊢ (𝐹 ∈ (𝑋𝐷𝑌) → (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵)) |
3 | elovmpo.c | . . . . . . 7 ⊢ 𝐶 ∈ V | |
4 | 3 | gen2 1430 | . . . . . 6 ⊢ ∀𝑎∀𝑏 𝐶 ∈ V |
5 | elovmpo.e | . . . . . . . 8 ⊢ ((𝑎 = 𝑋 ∧ 𝑏 = 𝑌) → 𝐶 = 𝐸) | |
6 | 5 | eleq1d 2226 | . . . . . . 7 ⊢ ((𝑎 = 𝑋 ∧ 𝑏 = 𝑌) → (𝐶 ∈ V ↔ 𝐸 ∈ V)) |
7 | 6 | spc2gv 2803 | . . . . . 6 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) → (∀𝑎∀𝑏 𝐶 ∈ V → 𝐸 ∈ V)) |
8 | 4, 7 | mpi 15 | . . . . 5 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) → 𝐸 ∈ V) |
9 | 5, 1 | ovmpoga 5950 | . . . . 5 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵 ∧ 𝐸 ∈ V) → (𝑋𝐷𝑌) = 𝐸) |
10 | 8, 9 | mpd3an3 1320 | . . . 4 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) → (𝑋𝐷𝑌) = 𝐸) |
11 | 10 | eleq2d 2227 | . . 3 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) → (𝐹 ∈ (𝑋𝐷𝑌) ↔ 𝐹 ∈ 𝐸)) |
12 | 2, 11 | biadan2 452 | . 2 ⊢ (𝐹 ∈ (𝑋𝐷𝑌) ↔ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) ∧ 𝐹 ∈ 𝐸)) |
13 | df-3an 965 | . 2 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵 ∧ 𝐹 ∈ 𝐸) ↔ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) ∧ 𝐹 ∈ 𝐸)) | |
14 | 12, 13 | bitr4i 186 | 1 ⊢ (𝐹 ∈ (𝑋𝐷𝑌) ↔ (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵 ∧ 𝐹 ∈ 𝐸)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 963 ∀wal 1333 = wceq 1335 ∈ wcel 2128 Vcvv 2712 (class class class)co 5824 ∈ cmpo 5826 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-14 2131 ax-ext 2139 ax-sep 4082 ax-pow 4135 ax-pr 4169 ax-setind 4496 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-ral 2440 df-rex 2441 df-v 2714 df-sbc 2938 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3773 df-br 3966 df-opab 4026 df-id 4253 df-xp 4592 df-rel 4593 df-cnv 4594 df-co 4595 df-dm 4596 df-iota 5135 df-fun 5172 df-fv 5178 df-ov 5827 df-oprab 5828 df-mpo 5829 |
This theorem is referenced by: (None) |
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