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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 2762 | . . . . 5 ⊢ 𝐹 = {〈〈𝑥, 𝑦〉, 𝑧〉 ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)} |
| 4 | 3 | dmeqi 5846 | . . . 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 3961 | . . 3 ⊢ dom 𝐹 ⊆ (𝐴 × 𝐵) |
| 7 | elfvdm 6861 | . . . 4 ⊢ (𝑋 ∈ (𝐹‘〈𝑆, 𝑇〉) → 〈𝑆, 𝑇〉 ∈ dom 𝐹) | |
| 8 | df-ov 7359 | . . . 4 ⊢ (𝑆𝐹𝑇) = (𝐹‘〈𝑆, 𝑇〉) | |
| 9 | 7, 8 | eleq2s 2857 | . . 3 ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → 〈𝑆, 𝑇〉 ∈ dom 𝐹) |
| 10 | 6, 9 | sselid 3913 | . 2 ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → 〈𝑆, 𝑇〉 ∈ (𝐴 × 𝐵)) |
| 11 | opelxp 5654 | . 2 ⊢ (〈𝑆, 𝑇〉 ∈ (𝐴 × 𝐵) ↔ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐵)) | |
| 12 | 10, 11 | sylib 219 | 1 ⊢ (𝑋 ∈ (𝑆𝐹𝑇) → (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 〈cop 4561 × cxp 5616 dom cdm 5618 ‘cfv 6485 (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 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pr 5362 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-xp 5624 df-dm 5628 df-iota 6441 df-fv 6493 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 8024 ixxssixx 13303 funcrcl 17821 natrcl 17911 mgmhmrcl 18653 ismhm 18744 isghm 19181 isghmOLD 19182 isga 19257 isslw 19574 rnghmrcl 20409 rngimrcl 20417 isrhm 20449 rimrcl 20452 islmhm 21017 iscn2 23221 elflim2 23947 isfcls 23992 isnmhm 24729 limcrcl 25859 ewlkprop 29690 wwlknbp 29928 wspthnp 29936 iscvm 35487 mclsrcl 35789 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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