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Mirrors > Home > MPE Home > Th. List > elpri | Structured version Visualization version GIF version |
Description: If a class is an element of a pair, then it is one of the two paired elements. (Contributed by Scott Fenton, 1-Apr-2011.) |
Ref | Expression |
---|---|
elpri | ⊢ (𝐴 ∈ {𝐵, 𝐶} → (𝐴 = 𝐵 ∨ 𝐴 = 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elprg 4546 | . 2 ⊢ (𝐴 ∈ {𝐵, 𝐶} → (𝐴 ∈ {𝐵, 𝐶} ↔ (𝐴 = 𝐵 ∨ 𝐴 = 𝐶))) | |
2 | 1 | ibi 270 | 1 ⊢ (𝐴 ∈ {𝐵, 𝐶} → (𝐴 = 𝐵 ∨ 𝐴 = 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∨ wo 844 = wceq 1538 ∈ wcel 2111 {cpr 4527 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-tru 1541 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-v 3443 df-un 3886 df-sn 4526 df-pr 4528 |
This theorem is referenced by: nelpri 4554 nelprd 4556 tppreqb 4698 elpreqpr 4757 elpr2elpr 4759 prproe 4798 3elpr2eq 4799 opth1 5332 0nelop 5351 ftpg 6895 2oconcl 8111 cantnflem2 9137 eldju1st 9336 m1expcl2 13447 hash2pwpr 13830 bitsinv1lem 15780 prm23lt5 16141 fnpr2ob 16823 fvprif 16826 xpsfeq 16828 pmtrprfval 18607 m1expaddsub 18618 psgnprfval 18641 frgpuptinv 18889 frgpup3lem 18895 simpgnsgeqd 19216 2nsgsimpgd 19217 simpgnsgbid 19218 cnmsgnsubg 20266 zrhpsgnelbas 20283 mdetralt 21213 m2detleiblem1 21229 indiscld 21696 cnindis 21897 connclo 22020 txindis 22239 xpsxmetlem 22986 xpsmet 22989 ishl2 23974 recnprss 24507 recnperf 24508 dvlip2 24598 coseq0negpitopi 25096 pythag 25403 reasinsin 25482 scvxcvx 25571 perfectlem2 25814 lgslem4 25884 lgseisenlem2 25960 2lgsoddprmlem3 25998 usgredg4 27007 konigsberg 28042 ex-pr 28215 elpreq 30302 1neg1t1neg1 30499 tocyc01 30810 signswch 31941 kur14lem7 32572 poimirlem31 35088 ftc1anclem2 35131 wepwsolem 39986 relexp01min 40414 clsk1indlem1 40748 mnuprdlem1 40980 mnuprdlem2 40981 mnuprdlem3 40982 mnurndlem1 40989 ssrecnpr 41012 seff 41013 sblpnf 41014 expgrowthi 41037 dvconstbi 41038 sumpair 41664 refsum2cnlem1 41666 iooinlbub 42138 elprn1 42275 elprn2 42276 cncfiooicclem1 42535 dvmptconst 42557 dvmptidg 42559 dvmulcncf 42567 dvdivcncf 42569 elprneb 43621 perfectALTVlem2 44240 0dig2pr01 45024 prelrrx2b 45128 |
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