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| Description: Any class is a subclass of itself. Exercise 10 of [TakeutiZaring] p. 18. |
| Ref | Expression |
|---|---|
| ssid |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 1468 |
. . 3
| |
| 2 | eqss 2067 |
. . 3
| |
| 3 | 1, 2 | mpbi 189 |
. 2
|
| 4 | 3 | pm3.26i 320 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: eqimss 2099 eqimssi 2101 eqimss2i 2102 nssinpss 2230 nsspssun 2231 inv1 2289 disjpss 2309 difid 2324 pwid 2398 elssuni 2516 unimax 2522 intmin 2543 iunpw 2904 ordunidif 2995 onsucuni 3075 ssres2 3370 residm 3374 resdm 3377 ssrnres 3467 fnfrn 3619 fssxp 3622 funssxp 3623 fimacnv 3795 tfrlem1 3896 tz7.48-2 3942 abianfp 3947 oaordi 4164 omwordi 4186 omass 4195 xpdom3 4425 sucprcreg 4572 noinfep 4612 scott0 4689 htalem 4699 zorn2lem4 4763 cflem 4877 cflecard 4884 axresscn 5240 expclt 6513 clmi1 7024 clm4at 7028 clmi2at 7029 climconst 7031 climunii 7035 climshft 7041 climres 7042 climuz0 7045 climmullem8 7063 serzf0 7105 ser1f0 7106 isumclim4t 7136 negfcncf 7204 abscncflem 7209 cjcncf 7213 mulc1cncf 7214 isupivth 7225 dsupivthlem 7226 efcn 7363 reeff1olem1 7364 reeff1olem1OLD 7366 xpnnen 7441 alephexp2 7528 topopn 7544 topbast 7569 subbas 7586 retopbas 7597 topcld 7617 clstop 7642 ntrtop 7643 opnneissb 7669 opnssneib 7670 opnneiid 7678 islp2 7688 ssblex 7796 opnm 7800 blssopn 7807 blnei 7818 cncfmet1 7845 lmbrf 7868 iscauf 7877 iscau5 7878 lmsslem 7887 caussi 7889 lmclimnn 7899 opr1scn 7914 grpidinv2 7994 grpinv 8003 abscncfALT 8278 sspid 8318 ssps 8323 pilem1 8590 efghgrpilem 8634 efifolem1 8637 axgroth3 8718 grothinf 8720 h2hcau 8788 h2hlm 8789 helch 9037 hhssnv 9054 hhsssh 9059 occlt 9098 omls 9161 shintclt 9209 chintclt 9211 shlesb1 9274 chm1 9294 chlejb1 9314 chm0 9328 chabs1t 9354 chabs2t 9355 spanunt 9383 cmid 9470 pjidmco 10016 hst0t 10070 csmdsym 10169 sumdmdlem2 10253 dmdbr5at 10255 mdcompl 10261 dmdcompl 10262 fgsb 10444 efilcp 10445 fgsb2 10449 efilcp2 10450 0alg 10533 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-12 965 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 978 df-sb 1168 df-clab 1457 df-cleq 1462 df-clel 1465 df-in 2041 df-ss 2043 |