| 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 4612 | . 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 |
| This proof depends on syntax axioms: ↔ wb 209 ∨ wo 860 = wceq 1570 ∈ wcel 2143 Vcvv 3455 {cpr 4591 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-tru 1573 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-v 3457 df-un 3910 df-sn 4590 df-pr 4592 |
| This theorem is used by: difprsnss 4767 preq12b 4815 pwpr 4866 pwtp 4867 uniprg 4888 intprg 4946 axprALT 5393 zfpair2 5405 prex 5409 opthwiener 5497 tpres 7199 fnprb 7206 2oconcl 8484 pw2f1olem 9065 djuunxp 9912 sdom2en01 10290 gruun 10795 fzpr 13612 m1expeven 14150 bpoly2 16115 bpoly3 16116 lcmfpr 16689 isprm2 16744 gsumpr 20029 drngnidl 21386 psgninv 21741 psgnodpm 21747 mdetunilem7 22784 indistopon 23167 dfconn2 23585 cnconn 23588 unconn 23595 txindis 23800 txconn 23855 filconn 24049 xpsdsval 24547 rolle 26158 dvivthlem1 26176 ang180lem3 26985 ang180lem4 26986 wilthlem2 27242 sqff1o 27355 ppiub 27377 lgslem1 27470 lgsdir2lem4 27501 lgsdir2lem5 27502 gausslemma2dlem0i 27537 2lgslem3 27577 2lgslem4 27579 nosgnn0 27831 structiedg0val 29381 usgrexmplef 29618 3vfriswmgrlem 30637 prodpr 33179 cycpm2tr 33448 drngmxidlr 33769 lmat22lem 34216 signslema 34958 circlemethhgt 35039 subfacp1lem1 35679 subfacp1lem4 35683 rankeq1o 36671 onsucconni 36976 topdifinfindis 38020 poimirlem9 38308 divrngidl 38707 isfldidl 38747 dihmeetlem2N 42101 wopprc 43785 pw2f1ocnv 43792 kelac2lem 43819 prclaxpr 45722 permaxpr 45747 rnmptpr 45923 cncfiooicclem1 46635 paireqne 48288 31prm 48377 lighneallem4 48390 upgrimpths 48702 usgrexmpl2nb1 48825 usgrexmpl2nb2 48826 usgrexmpl2nb4 48828 usgrexmpl2nb5 48829 usgrexmpl2trifr 48830 pgnbgreunbgrlem3 48911 pgnbgreunbgrlem6 48917 nn0sumshdiglem2 49430 2arwcatlem1 50401 2arwcatlem5 50405 2arwcat 50406 onsetreclem3 50513 |
| Copyright terms: Public domain | W3C validator |