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| Description: Equality implies the subclass relation. |
| Ref | Expression |
|---|---|
| eqimss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssid 2083 |
. 2
| |
| 2 | sseq2 2086 |
. 2
| |
| 3 | 1, 2 | mpbii 193 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: eqimss2 2113 sspss 2148 uneqin 2259 pwpw0 2473 sssn 2477 eqsn 2478 sspr 2479 snsspw 2483 pwsnALT 2505 elpwuni 2767 pwssun 2833 ordsseleq 2982 ordsson 2997 trsucss 3062 suceloni 3068 suc11 3099 dmxpss 3479 rnxpss 3480 xp11 3482 fnresdm 3602 ffdm 3645 fconst 3664 fof 3678 f1o2 3699 f1o3 3700 f1ofv 3883 tfrlem11 3927 oewordi 4224 oewordri 4225 r1ord3 4667 rankxplim3 4724 carddom 4846 cflim 4921 cfsuc 4927 istps2 7608 chsupsn 9307 chlejb1 9394 atsseq 10269 sfvlim 10576 trnij 10608 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-10 968 ax-12 970 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 983 df-sb 1174 df-clab 1467 df-cleq 1472 df-clel 1475 df-in 2054 df-ss 2056 |