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Mirrors > Home > MPE Home > Th. List > prid2 | Structured version Visualization version GIF version |
Description: An unordered pair contains its second member. Part of Theorem 7.6 of [Quine] p. 49. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
prid2.1 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
prid2 | ⊢ 𝐵 ∈ {𝐴, 𝐵} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | prid2.1 | . . 3 ⊢ 𝐵 ∈ V | |
2 | 1 | prid1 4297 | . 2 ⊢ 𝐵 ∈ {𝐵, 𝐴} |
3 | prcom 4267 | . 2 ⊢ {𝐵, 𝐴} = {𝐴, 𝐵} | |
4 | 2, 3 | eleqtri 2699 | 1 ⊢ 𝐵 ∈ {𝐴, 𝐵} |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1990 Vcvv 3200 {cpr 4179 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-v 3202 df-un 3579 df-sn 4178 df-pr 4180 |
This theorem is referenced by: prel12 4383 opi2 4938 opeluu 4939 opthwiener 4976 dmrnssfld 5384 funopg 5922 2dom 8029 dfac2 8953 brdom7disj 9353 brdom6disj 9354 cnelprrecn 10029 mnfxr 10096 m1expcl2 12882 hash2prb 13254 pr2pwpr 13261 sadcf 15175 xpsfrnel2 16225 setcepi 16738 grpss 17440 efgi1 18134 frgpuptinv 18184 dmdprdpr 18448 dprdpr 18449 cnmsgnsubg 19923 m2detleiblem6 20432 m2detleiblem3 20435 m2detleiblem4 20436 m2detleib 20437 indiscld 20895 xpstopnlem1 21612 xpstopnlem2 21614 i1f1lem 23456 i1f1 23457 aannenlem2 24084 taylthlem2 24128 ppiublem2 24928 lgsdir2lem3 25052 ecgrtg 25863 elntg 25864 usgr2trlncl 26656 umgrwwlks2on 26850 wlk2v2e 27017 eulerpathpr 27100 ex-br 27288 ex-eprel 27290 subfacp1lem3 31164 kur14lem7 31194 fprb 31669 sltres 31815 noextendgt 31823 nolesgn2ores 31825 nosepnelem 31830 nosepdmlem 31833 nolt02o 31845 nosupno 31849 nosupbnd1lem3 31856 nosupbnd1 31860 nosupbnd2lem1 31861 onpsstopbas 32429 onint1 32448 bj-inftyexpidisj 33097 kelac2 37635 fvrcllb1d 37987 relexp1idm 38006 corcltrcl 38031 cotrclrcl 38034 clsk1indlem1 38343 refsum2cnlem1 39196 limsup10exlem 40004 fourierdlem103 40426 fourierdlem104 40427 ioorrnopn 40525 ioorrnopnxr 40527 zlmodzxzscm 42135 zlmodzxzldeplem3 42291 nn0sumshdiglemB 42414 |
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