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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 5067 | . 2 ⊢ (𝐴𝑅𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑅) | |
2 | opeldm.1 | . . 3 ⊢ 𝐴 ∈ V | |
3 | opeldm.2 | . . 3 ⊢ 𝐵 ∈ V | |
4 | 2, 3 | opeldm 5776 | . 2 ⊢ (〈𝐴, 𝐵〉 ∈ 𝑅 → 𝐴 ∈ dom 𝑅) |
5 | 1, 4 | sylbi 219 | 1 ⊢ (𝐴𝑅𝐵 → 𝐴 ∈ dom 𝑅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2114 Vcvv 3494 〈cop 4573 class class class wbr 5066 dom cdm 5555 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-br 5067 df-dm 5565 |
This theorem is referenced by: funcnv3 6424 opabiota 6746 dffv2 6756 dff13 7013 exse2 7622 reldmtpos 7900 rntpos 7905 dftpos4 7911 tpostpos 7912 wfrlem5 7959 iserd 8315 dcomex 9869 axdc2lem 9870 axdclem2 9942 dmrecnq 10390 cotr2g 14336 shftfval 14429 geolim2 15227 geomulcvg 15232 geoisum1c 15236 cvgrat 15239 ntrivcvg 15253 eftlub 15462 eflegeo 15474 rpnnen2lem5 15571 imasleval 16814 psdmrn 17817 psssdm2 17825 ovoliunnul 24108 vitalilem5 24213 dvcj 24547 dvrec 24552 dvef 24577 ftc1cn 24640 aaliou3lem3 24933 ulmdv 24991 dvradcnv 25009 abelthlem7 25026 abelthlem9 25028 logtayllem 25242 leibpi 25520 log2tlbnd 25523 zetacvg 25592 hhcms 28980 hhsscms 29055 occl 29081 gsummpt2co 30686 iprodgam 32974 imaindm 33022 fprlem1 33137 frrlem15 33142 imageval 33391 knoppcnlem6 33837 knoppndvlem6 33856 knoppf 33874 unccur 34890 ftc1cnnc 34981 geomcau 35049 dvradcnv2 40699 |
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