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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 3720 | . 2 ⊢ (𝐴 = 𝐵 → {𝐴} = {𝐵}) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → {𝐴} = {𝐵}) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 {csn 3709 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-sn 3715 |
| This theorem is used by: dmsnsnsng 5268 cnvsng 5276 ressn 5331 f1osng 5685 fsng 5884 fsn2g 5886 funopsn 5894 fnressn 5904 fvsng 5914 2nd1st 6418 dfmpo 6463 cnvf1olem 6464 suppsnopdc 6494 tpostpos 6539 tfrlemi1 6607 tfr1onlemaccex 6623 tfrcllemaccex 6636 elixpsn 7021 ixpsnf1o 7022 en1bg 7091 mapsnend 7103 mapsnen 7104 xpassen 7132 fztp 10502 fzsuc2 10503 fseq1p1m1 10518 fseq1m1p1 10519 zfz1isolemsplit 11312 zfz1isolem1 11314 s1val 11407 s1eq 11409 s1prc 11413 fsumm1 12208 fprodm1 12390 divalgmod 12719 ennnfonelemg 13352 ennnfonelemp1 13355 ennnfonelem1 13356 ennnfonelemnn0 13371 setsvalg 13440 strsetsid 13443 imasex 13685 imasival 13686 imasaddvallemg 13695 mulgval 13984 isunitd 14522 lspsnneg 14866 lspsnsub 14867 lmodindp1 14874 lidl0 14935 rsp0 14939 ridl0 14956 zrhrhmb 15066 znval 15080 psrval 15159 txdis 15503 upgr1een 16570 1loopgruspgr 16749 wkslem1 16766 wkslem2 16767 iswlk 16769 loopclwwlkn1b 16865 clwwlkn1loopb 16866 eupth2lem3lem3fi 16916 wexmiddifxylem 17250 |
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