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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 5069 | . 2 ⊢ (𝐴𝑅𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑅) | |
2 | opeldm.1 | . . 3 ⊢ 𝐴 ∈ V | |
3 | opeldm.2 | . . 3 ⊢ 𝐵 ∈ V | |
4 | 2, 3 | opeldm 5778 | . 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 3496 〈cop 4575 class class class wbr 5068 dom cdm 5557 |
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 2795 |
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 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-rab 3149 df-v 3498 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-br 5069 df-dm 5567 |
This theorem is referenced by: funcnv3 6426 opabiota 6748 dffv2 6758 dff13 7015 exse2 7624 reldmtpos 7902 rntpos 7907 dftpos4 7913 tpostpos 7914 wfrlem5 7961 iserd 8317 dcomex 9871 axdc2lem 9872 axdclem2 9944 dmrecnq 10392 cotr2g 14338 shftfval 14431 geolim2 15229 geomulcvg 15234 geoisum1c 15238 cvgrat 15241 ntrivcvg 15255 eftlub 15464 eflegeo 15476 rpnnen2lem5 15573 imasleval 16816 psdmrn 17819 psssdm2 17827 ovoliunnul 24110 vitalilem5 24215 dvcj 24549 dvrec 24554 dvef 24579 ftc1cn 24642 aaliou3lem3 24935 ulmdv 24993 dvradcnv 25011 abelthlem7 25028 abelthlem9 25030 logtayllem 25244 leibpi 25522 log2tlbnd 25525 zetacvg 25594 hhcms 28982 hhsscms 29057 occl 29083 gsummpt2co 30688 iprodgam 32976 imaindm 33024 fprlem1 33139 frrlem15 33144 imageval 33393 knoppcnlem6 33839 knoppndvlem6 33858 knoppf 33876 unccur 34877 ftc1cnnc 34968 geomcau 35036 dvradcnv2 40686 |
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