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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 7366 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) = {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} | |
| 3 | 1, 2 | eqtri 2760 | . . . . 5 ⊢ 𝐹 = {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} |
| 4 | 3 | dmeqi 5854 | . . . 4 ⊢ dom 𝐹 = dom {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} |
| 5 | dmoprabss 7465 | . . . 4 ⊢ dom {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} ⊆ (𝐴 × 𝐵) | |
| 6 | 4, 5 | eqsstri 3969 | . . 3 ⊢ dom 𝐹 ⊆ (𝐴 × 𝐵) |
| 7 | elfvdm 6869 | . . . 4 ⊢ (𝑋 ∈ (𝐹‘〈𝑆, 𝑇〉) → 〈𝑆, 𝑇〉 ∈ dom 𝐹) | |
| 8 | df-ov 7364 | . . . 4 ⊢ (𝑆𝐹𝑇) = (𝐹‘〈𝑆, 𝑇〉) | |
| 9 | 7, 8 | eleq2s 2855 | . . 3 ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → 〈𝑆, 𝑇〉 ∈ dom 𝐹) |
| 10 | 6, 9 | sselid 3920 | . 2 ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → 〈𝑆, 𝑇〉 ∈ (𝐴 × 𝐵)) |
| 11 | opelxp 5661 | . 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 1542 ∈ wcel 2114 〈cop 4574 × cxp 5623 dom cdm 5625 ‘cfv 6493 (class class class)co 7361 {coprab 7362 ∈ cmpo 7363 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pr 5371 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-xp 5631 df-dm 5635 df-iota 6449 df-fv 6501 df-ov 7364 df-oprab 7365 df-mpo 7366 |
| This theorem is referenced by: elmpocl1 7603 elmpocl2 7604 elovmpo 7606 elovmporab 7607 elovmporab1w 7608 elovmporab1 7609 el2mpocsbcl 8029 ixxssixx 13306 funcrcl 17824 natrcl 17914 mgmhmrcl 18656 ismhm 18747 isghm 19184 isghmOLD 19185 isga 19260 isslw 19577 rnghmrcl 20412 rngimrcl 20420 isrhm 20452 rimrcl 20455 islmhm 21017 iscn2 23216 elflim2 23942 isfcls 23987 isnmhm 24724 limcrcl 25854 ewlkprop 29690 wwlknbp 29928 wspthnp 29936 iscvm 35460 mclsrcl 35762 intop 48694 naryrcl 49122 sectrcl2 49513 invrcl2 49515 isorcl2 49524 eloppf2 49624 uprcl 49674 oppc1stflem 49777 catcrcl2 49886 lanrcl 50111 ranrcl 50112 |
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