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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 4584 | . 2 ⊢ (𝐴𝑅𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑅) | |
2 | opeldm.1 | . . 3 ⊢ 𝐴 ∈ V | |
3 | opeldm.2 | . . 3 ⊢ 𝐵 ∈ V | |
4 | 2, 3 | opeldm 5250 | . 2 ⊢ (〈𝐴, 𝐵〉 ∈ 𝑅 → 𝐴 ∈ dom 𝑅) |
5 | 1, 4 | sylbi 206 | 1 ⊢ (𝐴𝑅𝐵 → 𝐴 ∈ dom 𝑅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 1977 Vcvv 3173 〈cop 4131 class class class wbr 4583 dom cdm 5038 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-br 4584 df-dm 5048 |
This theorem is referenced by: funcnv3 5873 opabiota 6171 dffv2 6181 dff13 6416 exse2 6998 reldmtpos 7247 rntpos 7252 dftpos4 7258 tpostpos 7259 wfrlem5 7306 iserd 7655 dcomex 9152 axdc2lem 9153 axdclem2 9225 dmrecnq 9669 cotr2g 13563 shftfval 13658 geolim2 14441 geomulcvg 14446 geoisum1c 14450 cvgrat 14454 ntrivcvg 14468 eftlub 14678 eflegeo 14690 rpnnen2lem5 14786 imasleval 16024 psdmrn 17030 psssdm2 17038 ovoliunnul 23082 vitalilem5 23187 dvcj 23519 dvrec 23524 dvef 23547 ftc1cn 23610 aaliou3lem3 23903 ulmdv 23961 dvradcnv 23979 abelthlem7 23996 abelthlem9 23998 logtayllem 24205 leibpi 24469 log2tlbnd 24472 zetacvg 24541 hhcms 27444 hhsscms 27520 occl 27547 gsummpt2co 29111 iprodgam 30881 frrlem5 31028 imageval 31207 knoppcnlem6 31658 knoppndvlem6 31678 knoppf 31696 unccur 32562 ftc1cnnc 32654 geomcau 32725 dvradcnv2 37568 |
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