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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 3603 | . 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 1353 {csn 3592 |
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 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-11 1506 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-tru 1356 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-sn 3598 |
This theorem is referenced by: dmsnsnsng 5103 cnvsng 5111 ressn 5166 f1osng 5499 fsng 5686 fnressn 5699 fvsng 5709 2nd1st 6176 dfmpo 6219 cnvf1olem 6220 tpostpos 6260 tfrlemi1 6328 tfr1onlemaccex 6344 tfrcllemaccex 6357 elixpsn 6730 ixpsnf1o 6731 en1bg 6795 mapsnen 6806 xpassen 6825 fztp 10071 fzsuc2 10072 fseq1p1m1 10087 fseq1m1p1 10088 zfz1isolemsplit 10809 zfz1isolem1 10811 fsumm1 11415 fprodm1 11597 divalgmod 11922 ennnfonelemg 12394 ennnfonelemp1 12397 ennnfonelem1 12398 ennnfonelemnn0 12413 setsvalg 12482 strsetsid 12485 mulgval 12914 isunitd 13174 txdis 13559 |
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