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| Mirrors > Home > MPE Home > Th. List > elpr | Structured version Visualization version GIF version | ||
| Description: A member of a pair of classes is one or the other of them, and conversely as soon as it is a set. Exercise 1 of [TakeutiZaring] p. 15. (Contributed by NM, 13-Sep-1995.) |
| Ref | Expression |
|---|---|
| elpr.1 | ⊢ 𝐴 ∈ V |
| Ref | Expression |
|---|---|
| elpr | ⊢ (𝐴 ∈ {𝐵, 𝐶} ↔ (𝐴 = 𝐵 ∨ 𝐴 = 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elpr.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | elprg 4591 | . 2 ⊢ (𝐴 ∈ V → (𝐴 ∈ {𝐵, 𝐶} ↔ (𝐴 = 𝐵 ∨ 𝐴 = 𝐶))) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 ∈ {𝐵, 𝐶} ↔ (𝐴 = 𝐵 ∨ 𝐴 = 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∨ wo 848 = wceq 1542 ∈ wcel 2114 Vcvv 3430 {cpr 4570 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-v 3432 df-un 3895 df-sn 4569 df-pr 4571 |
| This theorem is referenced by: difprsnss 4743 preq12b 4794 pwpr 4845 pwtp 4846 uniprg 4867 intprg 4924 axprALT 5361 zfpair2 5373 prex 5377 opthwiener 5464 tpres 7151 fnprb 7158 2oconcl 8433 pw2f1olem 9014 djuunxp 9840 sdom2en01 10219 gruun 10724 fzpr 13528 m1expeven 14066 bpoly2 16017 bpoly3 16018 lcmfpr 16591 isprm2 16646 gsumpr 19925 drngnidl 21237 psgninv 21576 psgnodpm 21582 mdetunilem7 22597 indistopon 22980 dfconn2 23398 cnconn 23401 unconn 23408 txindis 23613 txconn 23668 filconn 23862 xpsdsval 24360 rolle 25971 dvivthlem1 25989 ang180lem3 26792 ang180lem4 26793 wilthlem2 27050 sqff1o 27163 ppiub 27185 lgslem1 27278 lgsdir2lem4 27309 lgsdir2lem5 27310 gausslemma2dlem0i 27345 2lgslem3 27385 2lgslem4 27387 nosgnn0 27640 structiedg0val 29109 usgrexmplef 29346 3vfriswmgrlem 30366 prodpr 32918 cycpm2tr 33199 drngmxidlr 33557 lmat22lem 33981 signslema 34726 circlemethhgt 34807 subfacp1lem1 35381 subfacp1lem4 35385 rankeq1o 36373 onsucconni 36639 topdifinfindis 37680 poimirlem9 37968 divrngidl 38367 isfldidl 38407 dihmeetlem2N 41763 wopprc 43480 pw2f1ocnv 43487 kelac2lem 43514 prclaxpr 45434 permaxpr 45459 rnmptpr 45629 cncfiooicclem1 46343 paireqne 47987 31prm 48076 lighneallem4 48089 upgrimpths 48401 usgrexmpl2nb1 48524 usgrexmpl2nb2 48525 usgrexmpl2nb4 48527 usgrexmpl2nb5 48528 usgrexmpl2trifr 48529 pgnbgreunbgrlem3 48610 pgnbgreunbgrlem6 48616 nn0sumshdiglem2 49114 2arwcatlem1 50086 2arwcatlem5 50090 2arwcat 50091 onsetreclem3 50198 |
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