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Mirrors > Home > MPE Home > Th. List > elpr | Structured version Visualization version GIF version |
Description: A member of an unordered pair of classes is one or the other of them. 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 4196 | . 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 196 ∨ wo 383 = wceq 1483 ∈ wcel 1990 Vcvv 3200 {cpr 4179 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-v 3202 df-un 3579 df-sn 4178 df-pr 4180 |
This theorem is referenced by: difprsnss 4329 preqr1OLD 4380 preq12b 4382 prel12 4383 pwpr 4430 pwtp 4431 unipr 4449 intpr 4510 axpr 4905 zfpair2 4907 elopOLD 4936 opthwiener 4976 tpres 6466 fnprb 6472 2oconcl 7583 pw2f1olem 8064 sdom2en01 9124 gruun 9628 fzpr 12396 m1expeven 12907 bpoly2 14788 bpoly3 14789 lcmfpr 15340 isprm2 15395 drngnidl 19229 psgninv 19928 psgnodpm 19934 mdetunilem7 20424 indistopon 20805 dfconn2 21222 cnconn 21225 unconn 21232 txindis 21437 txconn 21492 filconn 21687 xpsdsval 22186 rolle 23753 dvivthlem1 23771 ang180lem3 24541 ang180lem4 24542 wilthlem2 24795 sqff1o 24908 ppiub 24929 lgslem1 25022 lgsdir2lem4 25053 lgsdir2lem5 25054 gausslemma2dlem0i 25089 2lgslem3 25129 2lgslem4 25131 structiedg0val 25911 usgrexmplef 26151 3vfriswmgrlem 27141 prodpr 29572 lmat22lem 29883 signslema 30639 circlemethhgt 30721 subfacp1lem1 31161 subfacp1lem4 31165 nosgnn0 31811 rankeq1o 32278 onsucconni 32436 topdifinfindis 33194 poimirlem9 33418 divrngidl 33827 isfldidl 33867 dihmeetlem2N 36588 wopprc 37597 pw2f1ocnv 37604 kelac2lem 37634 rnmptpr 39358 cncfiooicclem1 40106 31prm 41512 lighneallem4 41527 gsumpr 42139 nn0sumshdiglem2 42416 onsetreclem3 42450 |
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