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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 3533 | . 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 1331 {csn 3522 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-11 1484 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-sn 3528 |
This theorem is referenced by: dmsnsnsng 5011 cnvsng 5019 ressn 5074 f1osng 5401 fsng 5586 fnressn 5599 fvsng 5609 2nd1st 6071 dfmpo 6113 cnvf1olem 6114 tpostpos 6154 tfrlemi1 6222 tfr1onlemaccex 6238 tfrcllemaccex 6251 elixpsn 6622 ixpsnf1o 6623 en1bg 6687 mapsnen 6698 xpassen 6717 fztp 9851 fzsuc2 9852 fseq1p1m1 9867 fseq1m1p1 9868 zfz1isolemsplit 10574 zfz1isolem1 10576 fsumm1 11178 divalgmod 11613 ennnfonelemg 11905 ennnfonelemp1 11908 ennnfonelem1 11909 ennnfonelemnn0 11924 setsvalg 11978 strsetsid 11981 txdis 12435 |
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