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| Mirrors > Home > MPE Home > Th. List > breldm | Structured version Visualization version GIF version | ||
| Description: Membership of first of a binary relation in a domain. (Contributed by NM, 30-Jul-1995.) |
| Ref | Expression |
|---|---|
| opeldm.1 | ⊢ 𝐴 ∈ V |
| opeldm.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| breldm | ⊢ (𝐴𝑅𝐵 → 𝐴 ∈ dom 𝑅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-br 5107 | . 2 ⊢ (𝐴𝑅𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑅) | |
| 2 | opeldm.1 | . . 3 ⊢ 𝐴 ∈ V | |
| 3 | opeldm.2 | . . 3 ⊢ 𝐵 ∈ V | |
| 4 | 2, 3 | opeldm 5895 | . 2 ⊢ (〈𝐴, 𝐵〉 ∈ 𝑅 → 𝐴 ∈ dom 𝑅) |
| 5 | 1, 4 | sylbi 220 | 1 ⊢ (𝐴𝑅𝐵 → 𝐴 ∈ dom 𝑅) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2147 Vcvv 3454 〈cop 4838 class class class wbr 5106 dom cdm 5655 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-dm 5665 |
| This theorem is used by: imaindm 6317 funcnv3 6629 opabiota 6987 dffv2 7000 dff13 7278 exse2 7950 reldmtpos 8276 rntpos 8281 dftpos4 8287 tpostpos 8288 fprlem1 8343 iserd 8769 dmttrcl 9746 ttrclse 9752 frrlem15 9785 dcomex 10549 axdc2lem 10550 dmrecnq 11077 cotr2g 15155 shftfval 15249 geolim2 16066 geomulcvg 16071 geoisum1c 16075 cvgrat 16078 ntrivcvg 16092 eftlub 16303 eflegeo 16315 rpnnen2lem5 16412 imasleval 17739 psdmrn 18773 psssdm2 18781 ovoliunnul 25855 vitalilem5 25960 dvcj 26297 dvrec 26302 dvef 26327 ftc1cn 26390 aaliou3lem3 26698 ulmdv 26757 dvradcnv 26775 abelthlem7 26792 abelthlem9 26794 logtayllem 27014 leibpi 27297 log2tlbnd 27300 zetacvg 27369 hhcms 31832 hhsscms 31907 occl 31933 gsummpt2co 33676 iprodgam 36684 imageval 36869 knoppcnlem6 37541 knoppndvlem6 37560 knoppf 37578 unccur 38717 ftc1cnnc 38801 geomcau 38884 dvradcnv2 45521 cocanss2 46112 xpco2 50171 |
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