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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 4605 | . 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 3442 {cpr 4584 |
| 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 3444 df-un 3908 df-sn 4583 df-pr 4585 |
| This theorem is referenced by: difprsnss 4757 preq12b 4808 pwpr 4859 pwtp 4860 uniprg 4881 intprg 4938 axprALT 5371 zfpair2 5382 prex 5386 opthwiener 5472 tpres 7159 fnprb 7166 2oconcl 8442 pw2f1olem 9023 djuunxp 9847 sdom2en01 10226 gruun 10731 fzpr 13509 m1expeven 14046 bpoly2 15994 bpoly3 15995 lcmfpr 16568 isprm2 16623 gsumpr 19901 drngnidl 21215 psgninv 21554 psgnodpm 21560 mdetunilem7 22579 indistopon 22962 dfconn2 23380 cnconn 23383 unconn 23390 txindis 23595 txconn 23650 filconn 23844 xpsdsval 24342 rolle 25967 dvivthlem1 25986 ang180lem3 26794 ang180lem4 26795 wilthlem2 27052 sqff1o 27165 ppiub 27188 lgslem1 27281 lgsdir2lem4 27312 lgsdir2lem5 27313 gausslemma2dlem0i 27348 2lgslem3 27388 2lgslem4 27390 nosgnn0 27643 structiedg0val 29113 usgrexmplef 29350 3vfriswmgrlem 30370 prodpr 32924 cycpm2tr 33219 drngmxidlr 33577 lmat22lem 34001 signslema 34746 circlemethhgt 34827 subfacp1lem1 35401 subfacp1lem4 35405 rankeq1o 36393 onsucconni 36659 topdifinfindis 37628 poimirlem9 37909 divrngidl 38308 isfldidl 38348 dihmeetlem2N 41704 wopprc 43416 pw2f1ocnv 43423 kelac2lem 43450 prclaxpr 45370 permaxpr 45395 rnmptpr 45565 cncfiooicclem1 46280 paireqne 47900 31prm 47986 lighneallem4 47999 upgrimpths 48298 usgrexmpl2nb1 48421 usgrexmpl2nb2 48422 usgrexmpl2nb4 48424 usgrexmpl2nb5 48425 usgrexmpl2trifr 48426 pgnbgreunbgrlem3 48507 pgnbgreunbgrlem6 48513 nn0sumshdiglem2 49011 2arwcatlem1 49983 2arwcatlem5 49987 2arwcat 49988 onsetreclem3 50095 |
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