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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 6065 | . . 3 ⊢ (𝐹 ∈ (𝑋𝐷𝑌) → (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵)) |
3 | elovmpo.c | . . . . . . 7 ⊢ 𝐶 ∈ V | |
4 | 3 | gen2 1450 | . . . . . 6 ⊢ ∀𝑎∀𝑏 𝐶 ∈ V |
5 | elovmpo.e | . . . . . . . 8 ⊢ ((𝑎 = 𝑋 ∧ 𝑏 = 𝑌) → 𝐶 = 𝐸) | |
6 | 5 | eleq1d 2246 | . . . . . . 7 ⊢ ((𝑎 = 𝑋 ∧ 𝑏 = 𝑌) → (𝐶 ∈ V ↔ 𝐸 ∈ V)) |
7 | 6 | spc2gv 2828 | . . . . . 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 6000 | . . . . 5 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵 ∧ 𝐸 ∈ V) → (𝑋𝐷𝑌) = 𝐸) |
10 | 8, 9 | mpd3an3 1338 | . . . 4 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) → (𝑋𝐷𝑌) = 𝐸) |
11 | 10 | eleq2d 2247 | . . 3 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) → (𝐹 ∈ (𝑋𝐷𝑌) ↔ 𝐹 ∈ 𝐸)) |
12 | 2, 11 | biadan2 456 | . 2 ⊢ (𝐹 ∈ (𝑋𝐷𝑌) ↔ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) ∧ 𝐹 ∈ 𝐸)) |
13 | df-3an 980 | . 2 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵 ∧ 𝐹 ∈ 𝐸) ↔ ((𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵) ∧ 𝐹 ∈ 𝐸)) | |
14 | 12, 13 | bitr4i 187 | 1 ⊢ (𝐹 ∈ (𝑋𝐷𝑌) ↔ (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐵 ∧ 𝐹 ∈ 𝐸)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 978 ∀wal 1351 = wceq 1353 ∈ wcel 2148 Vcvv 2737 (class class class)co 5871 ∈ cmpo 5873 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-14 2151 ax-ext 2159 ax-sep 4120 ax-pow 4173 ax-pr 4208 ax-setind 4535 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-ral 2460 df-rex 2461 df-v 2739 df-sbc 2963 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-br 4003 df-opab 4064 df-id 4292 df-xp 4631 df-rel 4632 df-cnv 4633 df-co 4634 df-dm 4635 df-iota 5176 df-fun 5216 df-fv 5222 df-ov 5874 df-oprab 5875 df-mpo 5876 |
This theorem is referenced by: (None) |
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