| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 4601 | . 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 847 = wceq 1541 ∈ wcel 2113 Vcvv 3438 {cpr 4580 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-tru 1544 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-v 3440 df-un 3904 df-sn 4579 df-pr 4581 |
| This theorem is referenced by: difprsnss 4753 preq12b 4804 pwpr 4855 pwtp 4856 uniprg 4877 intprg 4934 axprALT 5365 zfpair2 5376 opthwiener 5460 tpres 7145 fnprb 7152 2oconcl 8428 pw2f1olem 9007 djuunxp 9831 sdom2en01 10210 gruun 10715 fzpr 13493 m1expeven 14030 bpoly2 15978 bpoly3 15979 lcmfpr 16552 isprm2 16607 gsumpr 19882 drngnidl 21196 psgninv 21535 psgnodpm 21541 mdetunilem7 22560 indistopon 22943 dfconn2 23361 cnconn 23364 unconn 23371 txindis 23576 txconn 23631 filconn 23825 xpsdsval 24323 rolle 25948 dvivthlem1 25967 ang180lem3 26775 ang180lem4 26776 wilthlem2 27033 sqff1o 27146 ppiub 27169 lgslem1 27262 lgsdir2lem4 27293 lgsdir2lem5 27294 gausslemma2dlem0i 27329 2lgslem3 27369 2lgslem4 27371 nosgnn0 27624 structiedg0val 29044 usgrexmplef 29281 3vfriswmgrlem 30301 prodpr 32856 cycpm2tr 33150 drngmxidlr 33508 lmat22lem 33923 signslema 34668 circlemethhgt 34749 subfacp1lem1 35322 subfacp1lem4 35326 rankeq1o 36314 onsucconni 36580 topdifinfindis 37490 poimirlem9 37769 divrngidl 38168 isfldidl 38208 dihmeetlem2N 41498 wopprc 43214 pw2f1ocnv 43221 kelac2lem 43248 prclaxpr 45168 permaxpr 45193 rnmptpr 45363 cncfiooicclem1 46079 paireqne 47699 31prm 47785 lighneallem4 47798 upgrimpths 48097 usgrexmpl2nb1 48220 usgrexmpl2nb2 48221 usgrexmpl2nb4 48223 usgrexmpl2nb5 48224 usgrexmpl2trifr 48225 pgnbgreunbgrlem3 48306 pgnbgreunbgrlem6 48312 nn0sumshdiglem2 48810 2arwcatlem1 49782 2arwcatlem5 49786 2arwcat 49787 onsetreclem3 49894 |
| Copyright terms: Public domain | W3C validator |