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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 4617 | . 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 209 ∨ wo 860 = wceq 1567 ∈ wcel 2149 Vcvv 3463 {cpr 4596 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-tru 1570 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-v 3465 df-un 3918 df-sn 4595 df-pr 4597 |
| This theorem is referenced by: difprsnss 4771 preq12b 4819 pwpr 4870 pwtp 4871 uniprg 4892 intprg 4950 axprALT 5394 zfpair2 5406 prex 5410 opthwiener 5498 tpres 7200 fnprb 7207 2oconcl 8488 pw2f1olem 9069 djuunxp 9907 sdom2en01 10286 gruun 10791 fzpr 13607 m1expeven 14145 bpoly2 16111 bpoly3 16112 lcmfpr 16685 isprm2 16740 gsumpr 20025 drngnidl 21351 psgninv 21701 psgnodpm 21707 mdetunilem7 22744 indistopon 23127 dfconn2 23545 cnconn 23548 unconn 23555 txindis 23760 txconn 23815 filconn 24009 xpsdsval 24507 rolle 26118 dvivthlem1 26136 ang180lem3 26942 ang180lem4 26943 wilthlem2 27199 sqff1o 27312 ppiub 27334 lgslem1 27427 lgsdir2lem4 27458 lgsdir2lem5 27459 gausslemma2dlem0i 27494 2lgslem3 27534 2lgslem4 27536 nosgnn0 27788 structiedg0val 29313 usgrexmplef 29550 3vfriswmgrlem 30569 prodpr 33111 cycpm2tr 33380 drngmxidlr 33705 lmat22lem 34152 signslema 34894 circlemethhgt 34975 subfacp1lem1 35604 subfacp1lem4 35608 rankeq1o 36596 onsucconni 36871 topdifinfindis 37914 poimirlem9 38202 divrngidl 38601 isfldidl 38641 dihmeetlem2N 41997 wopprc 43683 pw2f1ocnv 43690 kelac2lem 43717 prclaxpr 45620 permaxpr 45645 rnmptpr 45821 cncfiooicclem1 46533 paireqne 48183 31prm 48272 lighneallem4 48285 upgrimpths 48597 usgrexmpl2nb1 48720 usgrexmpl2nb2 48721 usgrexmpl2nb4 48723 usgrexmpl2nb5 48724 usgrexmpl2trifr 48725 pgnbgreunbgrlem3 48806 pgnbgreunbgrlem6 48812 nn0sumshdiglem2 49321 2arwcatlem1 50292 2arwcatlem5 50296 2arwcat 50297 onsetreclem3 50404 |
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