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| Description: Equality implies the subclass relation. |
| Ref | Expression |
|---|---|
| eqimss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssid 1519 |
. 2
| |
| 2 | sseq2 1522 |
. 2
| |
| 3 | 1, 2 | mpbii 168 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: eqimss2 1549 sspss 1569 ss0b 1726 sssn 1852 snsspw 1857 pwpw0 1883 pwssun 1917 ordsseleq 2227 ordsson 2242 trsucss 2309 suceloni 2314 suc11 2341 limsuclem 2360 fnresdm 2731 fconst 2774 fof 2788 f1o2 2804 f1o3 2805 tfrlem11 2959 trcl 3489 r1ord3 3501 carddom 3642 cflim 3704 cfsuc 3709 om2uzf1o 4656 chsupsn 5313 chlejb1 5397 atsseq 5745 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-16 922 ax-17 925 ax-ext 1074 |
| This theorem depends on definitions: df-bi 128 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-in 1491 df-ss 1492 |