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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 3678 | . 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 1395 {csn 3667 |
| 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 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-11 1552 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-sn 3673 |
| This theorem is referenced by: dmsnsnsng 5212 cnvsng 5220 ressn 5275 f1osng 5622 fsng 5816 funopsn 5825 fnressn 5835 fvsng 5845 2nd1st 6338 dfmpo 6383 cnvf1olem 6384 tpostpos 6425 tfrlemi1 6493 tfr1onlemaccex 6509 tfrcllemaccex 6522 elixpsn 6899 ixpsnf1o 6900 en1bg 6969 mapsnen 6981 xpassen 7009 fztp 10303 fzsuc2 10304 fseq1p1m1 10319 fseq1m1p1 10320 zfz1isolemsplit 11092 zfz1isolem1 11094 s1val 11184 s1eq 11186 s1prc 11190 fsumm1 11967 fprodm1 12149 divalgmod 12478 ennnfonelemg 13014 ennnfonelemp1 13017 ennnfonelem1 13018 ennnfonelemnn0 13033 setsvalg 13102 strsetsid 13105 imasex 13378 imasival 13379 imasaddvallemg 13388 mulgval 13699 isunitd 14110 lspsnneg 14424 lspsnsub 14425 lmodindp1 14432 lidl0 14493 rsp0 14497 ridl0 14514 zrhrhmb 14626 znval 14640 psrval 14670 txdis 14991 1loopgruspgr 16109 wkslem1 16117 wkslem2 16118 iswlk 16120 loopclwwlkn1b 16214 clwwlkn1loopb 16215 |
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