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| Mirrors > Home > ILE Home > Th. List > sneqd | GIF version | ||
| Description: Equality deduction for singletons. (Contributed by NM, 22-Jan-2004.) |
| Ref | Expression |
|---|---|
| sneqd.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| sneqd | ⊢ (𝜑 → {𝐴} = {𝐵}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sneqd.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | sneq 3680 | . 2 ⊢ (𝐴 = 𝐵 → {𝐴} = {𝐵}) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → {𝐴} = {𝐵}) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 {csn 3669 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-11 1554 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-sn 3675 |
| This theorem is referenced by: dmsnsnsng 5214 cnvsng 5222 ressn 5277 f1osng 5626 fsng 5820 funopsn 5829 fnressn 5839 fvsng 5849 2nd1st 6342 dfmpo 6387 cnvf1olem 6388 tpostpos 6429 tfrlemi1 6497 tfr1onlemaccex 6513 tfrcllemaccex 6526 elixpsn 6903 ixpsnf1o 6904 en1bg 6973 mapsnen 6985 xpassen 7013 fztp 10312 fzsuc2 10313 fseq1p1m1 10328 fseq1m1p1 10329 zfz1isolemsplit 11101 zfz1isolem1 11103 s1val 11193 s1eq 11195 s1prc 11199 fsumm1 11976 fprodm1 12158 divalgmod 12487 ennnfonelemg 13023 ennnfonelemp1 13026 ennnfonelem1 13027 ennnfonelemnn0 13042 setsvalg 13111 strsetsid 13114 imasex 13387 imasival 13388 imasaddvallemg 13397 mulgval 13708 isunitd 14119 lspsnneg 14433 lspsnsub 14434 lmodindp1 14441 lidl0 14502 rsp0 14506 ridl0 14523 zrhrhmb 14635 znval 14649 psrval 14679 txdis 15000 upgr1een 15974 1loopgruspgr 16153 wkslem1 16170 wkslem2 16171 iswlk 16173 loopclwwlkn1b 16269 clwwlkn1loopb 16270 |
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