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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 3677 | . 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 3666 |
| 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 3672 |
| This theorem is referenced by: dmsnsnsng 5206 cnvsng 5214 ressn 5269 f1osng 5616 fsng 5810 funopsn 5819 fnressn 5829 fvsng 5839 2nd1st 6332 dfmpo 6375 cnvf1olem 6376 tpostpos 6416 tfrlemi1 6484 tfr1onlemaccex 6500 tfrcllemaccex 6513 elixpsn 6890 ixpsnf1o 6891 en1bg 6960 mapsnen 6972 xpassen 6997 fztp 10286 fzsuc2 10287 fseq1p1m1 10302 fseq1m1p1 10303 zfz1isolemsplit 11073 zfz1isolem1 11075 s1val 11165 s1eq 11167 s1prc 11171 fsumm1 11942 fprodm1 12124 divalgmod 12453 ennnfonelemg 12989 ennnfonelemp1 12992 ennnfonelem1 12993 ennnfonelemnn0 13008 setsvalg 13077 strsetsid 13080 imasex 13353 imasival 13354 imasaddvallemg 13363 mulgval 13674 isunitd 14085 lspsnneg 14399 lspsnsub 14400 lmodindp1 14407 lidl0 14468 rsp0 14472 ridl0 14489 zrhrhmb 14601 znval 14615 psrval 14645 txdis 14966 wkslem1 16061 wkslem2 16062 iswlk 16064 |
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