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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 4606 | . 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 208 ∨ wo 858 = wceq 1561 ∈ wcel 2143 Vcvv 3455 {cpr 4585 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-ext 2735 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-tru 1564 df-ex 1801 df-sb 2092 df-clab 2742 df-cleq 2755 df-clel 2838 df-v 3457 df-un 3910 df-sn 4584 df-pr 4586 |
| This theorem is referenced by: difprsnss 4760 preq12b 4809 pwpr 4860 pwtp 4861 uniprg 4882 intprg 4940 axprALT 5380 zfpair2 5392 prex 5396 opthwiener 5484 tpres 7186 fnprb 7193 2oconcl 8473 pw2f1olem 9054 djuunxp 9880 sdom2en01 10260 gruun 10765 fzpr 13585 m1expeven 14123 bpoly2 16088 bpoly3 16089 lcmfpr 16662 isprm2 16717 gsumpr 19996 drngnidl 21314 psgninv 21635 psgnodpm 21641 mdetunilem7 22679 indistopon 23062 dfconn2 23480 cnconn 23483 unconn 23490 txindis 23695 txconn 23750 filconn 23944 xpsdsval 24442 rolle 26053 dvivthlem1 26071 ang180lem3 26877 ang180lem4 26878 wilthlem2 27134 sqff1o 27247 ppiub 27269 lgslem1 27362 lgsdir2lem4 27393 lgsdir2lem5 27394 gausslemma2dlem0i 27429 2lgslem3 27469 2lgslem4 27471 nosgnn0 27723 structiedg0val 29224 usgrexmplef 29461 3vfriswmgrlem 30480 prodpr 33029 cycpm2tr 33300 drngmxidlr 33667 lmat22lem 34115 signslema 34857 circlemethhgt 34938 subfacp1lem1 35530 subfacp1lem4 35534 rankeq1o 36522 onsucconni 36798 topdifinfindis 37841 poimirlem9 38129 divrngidl 38528 isfldidl 38568 dihmeetlem2N 41924 wopprc 43608 pw2f1ocnv 43615 kelac2lem 43642 prclaxpr 45562 permaxpr 45587 rnmptpr 45756 cncfiooicclem1 46468 paireqne 48118 31prm 48207 lighneallem4 48220 upgrimpths 48532 usgrexmpl2nb1 48655 usgrexmpl2nb2 48656 usgrexmpl2nb4 48658 usgrexmpl2nb5 48659 usgrexmpl2trifr 48660 pgnbgreunbgrlem3 48741 pgnbgreunbgrlem6 48747 nn0sumshdiglem2 49245 2arwcatlem1 50217 2arwcatlem5 50221 2arwcat 50222 onsetreclem3 50329 |
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