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| Description: Equality implies the subclass relation. |
| Ref | Expression |
|---|---|
| eqimss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssid 2076 |
. 2
| |
| 2 | sseq2 2079 |
. 2
| |
| 3 | 1, 2 | mpbii 193 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: eqimss2 2106 sspss 2141 uneqin 2252 pwpw0 2465 sssn 2469 eqsn 2470 sspr 2471 snsspw 2475 elpwuni 2756 pwssun 2822 ordsseleq 2971 ordsson 2986 trsucss 3051 suceloni 3057 suc11 3088 dmxpss 3465 rnxpss 3466 xp11 3468 fnresdm 3588 ffdm 3630 fconst 3649 fof 3663 f1o2 3684 f1o3 3685 f1ofv 3868 tfrlem11 3912 oewordi 4208 oewordri 4209 r1ord3 4637 rankxplim3 4694 carddom 4816 cflim 4889 cfsuc 4895 istps2 7557 chsupsn 9250 chlejb1 9337 atsseq 10211 trnij 10517 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-10 964 ax-12 966 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 979 df-sb 1170 df-clab 1462 df-cleq 1467 df-clel 1470 df-in 2047 df-ss 2049 |