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| Mirrors > Home > ILE Home > Th. List > sneqd | Unicode version | ||
| Description: Equality deduction for singletons. (Contributed by NM, 22-Jan-2004.) |
| Ref | Expression |
|---|---|
| sneqd.1 |
|
| Ref | Expression |
|---|---|
| sneqd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sneqd.1 |
. 2
| |
| 2 | sneq 3720 |
. 2
| |
| 3 | 1, 2 | syl 14 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| 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 7022 ixpsnf1o 7023 en1bg 7092 mapsnend 7104 mapsnen 7105 xpassen 7133 fztp 10503 fzsuc2 10504 fseq1p1m1 10519 fseq1m1p1 10520 zfz1isolemsplit 11313 zfz1isolem1 11315 s1val 11408 s1eq 11410 s1prc 11414 fsumm1 12209 fprodm1 12391 divalgmod 12720 ennnfonelemg 13353 ennnfonelemp1 13356 ennnfonelem1 13357 ennnfonelemnn0 13372 setsvalg 13441 strsetsid 13444 imasex 13686 imasival 13687 imasaddvallemg 13696 mulgval 13985 isunitd 14523 lspsnneg 14867 lspsnsub 14868 lmodindp1 14875 lidl0 14936 rsp0 14940 ridl0 14957 zrhrhmb 15067 znval 15081 psrval 15162 txdis 15515 upgr1een 16582 1loopgruspgr 16761 wkslem1 16778 wkslem2 16779 iswlk 16781 loopclwwlkn1b 16877 clwwlkn1loopb 16878 eupth2lem3lem3fi 16928 wexmiddifxylem 17262 |
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