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| Mirrors > Home > MPE Home > Th. List > elmpocl | Structured version Visualization version GIF version | ||
| Description: If a two-parameter class is not empty, constrain the implicit pair. (Contributed by Stefan O'Rear, 7-Mar-2015.) |
| Ref | Expression |
|---|---|
| elmpocl.f | ⊢ 𝐹 = (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) |
| Ref | Expression |
|---|---|
| elmpocl | ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elmpocl.f | . . . . . 6 ⊢ 𝐹 = (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) | |
| 2 | df-mpo 7361 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) = {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} | |
| 3 | 1, 2 | eqtri 2757 | . . . . 5 ⊢ 𝐹 = {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} |
| 4 | 3 | dmeqi 5851 | . . . 4 ⊢ dom 𝐹 = dom {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} |
| 5 | dmoprabss 7460 | . . . 4 ⊢ dom {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} ⊆ (𝐴 × 𝐵) | |
| 6 | 4, 5 | eqsstri 3978 | . . 3 ⊢ dom 𝐹 ⊆ (𝐴 × 𝐵) |
| 7 | elfvdm 6866 | . . . 4 ⊢ (𝑋 ∈ (𝐹‘〈𝑆, 𝑇〉) → 〈𝑆, 𝑇〉 ∈ dom 𝐹) | |
| 8 | df-ov 7359 | . . . 4 ⊢ (𝑆𝐹𝑇) = (𝐹‘〈𝑆, 𝑇〉) | |
| 9 | 7, 8 | eleq2s 2852 | . . 3 ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → 〈𝑆, 𝑇〉 ∈ dom 𝐹) |
| 10 | 6, 9 | sselid 3929 | . 2 ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → 〈𝑆, 𝑇〉 ∈ (𝐴 × 𝐵)) |
| 11 | opelxp 5658 | . 2 ⊢ (〈𝑆, 𝑇〉 ∈ (𝐴 × 𝐵) ↔ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐵)) | |
| 12 | 10, 11 | sylib 218 | 1 ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 〈cop 4584 × cxp 5620 dom cdm 5622 ‘cfv 6490 (class class class)co 7356 {coprab 7357 ∈ cmpo 7358 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-xp 5628 df-dm 5632 df-iota 6446 df-fv 6498 df-ov 7359 df-oprab 7360 df-mpo 7361 |
| This theorem is referenced by: elmpocl1 7598 elmpocl2 7599 elovmpo 7601 elovmporab 7602 elovmporab1w 7603 elovmporab1 7604 el2mpocsbcl 8025 ixxssixx 13273 funcrcl 17785 natrcl 17875 mgmhmrcl 18617 ismhm 18708 isghm 19142 isghmOLD 19143 isga 19218 isslw 19535 rnghmrcl 20372 rngimrcl 20380 isrhm 20412 rimrcl 20415 islmhm 20977 iscn2 23180 elflim2 23906 isfcls 23951 isnmhm 24688 limcrcl 25829 ewlkprop 29626 wwlknbp 29864 wspthnp 29872 iscvm 35402 mclsrcl 35704 intop 48391 naryrcl 48819 sectrcl2 49210 invrcl2 49212 isorcl2 49221 eloppf2 49321 uprcl 49371 oppc1stflem 49474 catcrcl2 49583 lanrcl 49808 ranrcl 49809 |
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