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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 1475 |
. . 3
| |
| 2 | eqss 2075 |
. . 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 2107 eqimssi 2109 eqimss2i 2110 nssinpss 2238 nsspssun 2239 inv1 2297 disjpss 2317 difid 2332 pwid 2406 elssuni 2523 unimax 2529 intmin 2550 iunpw 2911 ordunidif 3002 onsucuni 3082 ssres2 3383 residm 3387 resdm 3390 ssrnres 3478 fnfrn 3631 fssxp 3634 funssxp 3635 fimacnv 3807 tfrlem1 3908 tz7.48-2 3954 abianfp 3959 oaordi 4177 omwordi 4199 omass 4208 xpdom3 4438 sucprcreg 4587 noinfep 4627 scott0 4704 htalem 4714 zorn2lem4 4778 cflem 4892 cflecard 4899 axresscn 5255 expclt 6531 clmi1 7054 clm4at 7058 clmi2at 7059 climconst 7062 climunii 7066 climshft 7072 climres 7073 climuz0 7076 climmullem8 7096 serzf0 7140 ser1f0 7141 isumclim4t 7172 negfcncf 7240 abscncflem 7245 cjcncf 7249 mulc1cncf 7250 isupivth 7261 dsupivthlem 7262 efcn 7399 reeff1olem1 7400 reeff1olem1OLD 7402 xpnnen 7477 alephexp2 7565 topopn 7581 topbast 7606 subbas 7623 retopbas 7634 topcld 7654 clstop 7679 ntrtop 7680 opnneissb 7707 opnssneib 7708 opnneiid 7716 islp2 7726 ssblex 7839 opnm 7843 blssopn 7850 blnei 7862 cncfmet1 7889 lmbrf 7913 iscauf 7922 iscau4 7923 iscau5 7924 iscaunns 7927 lmsslem 7935 caussi 7937 lmclimnn 7947 opr1scn 7963 grpidinv2 8043 grpinv 8052 abscncfALT 8330 sspid 8370 ssps 8375 pilem1 8654 efghgrpilem 8698 efifolem1 8701 axgroth3 8763 grothinf 8765 h2hcau 8833 h2hlm 8834 helch 9104 hhssnv 9122 hhsssh 9127 occlt 9170 omls 9234 shintclt 9282 chintclt 9284 shlesb1 9347 chm1 9367 chlejb1 9387 chm0 9401 chabs1t 9427 chabs2t 9428 spanunt 9456 cmid 9543 pjidmco 10096 hst0t 10151 csmdsym 10252 sumdmdlem2 10337 dmdbr5at 10340 mdcompl 10347 dmdcompl 10348 emfin 10465 fgsb 10538 efilcp 10539 fgsb2 10543 efilcp2 10544 0alg 10640 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-12 967 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 980 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-in 2049 df-ss 2051 |