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| Description: Equality theorem for the subclass relationship. |
| Ref | Expression |
|---|---|
| sseq2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sstr2 2074 |
. . . 4
| |
| 2 | 1 | com12 11 |
. . 3
|
| 3 | sstr2 2074 |
. . . 4
| |
| 4 | 3 | com12 11 |
. . 3
|
| 5 | 2, 4 | anim12i 333 |
. 2
|
| 6 | eqss 2080 |
. 2
| |
| 7 | dfbi2 516 |
. 2
| |
| 8 | 5, 6, 7 | 3imtr4 219 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: sseq12 2087 sseq2i 2089 sseq2d 2092 eqimss 2112 psseq2 2139 sseq0 2308 un00 2310 disjpss 2323 pweq 2407 ssuni 2526 ssintab 2554 ssintub 2555 intmin 2557 treq 2691 ssexg 2726 intabs 2738 iunpw 2920 ordunidif 3011 ordssun 3085 limomss 3143 findsg 3163 tfindsg 3168 unixp0 3524 fununi 3569 funcnvuni 3570 feq3 3628 feq23 3629 ssimaexg 3775 oawordeu 4195 oawordexr 4196 ereq 4273 domeng 4386 undom 4444 sbthlem4 4456 sbthlem5 4457 mapdom2lem 4499 php3 4521 php3OLD 4522 inf3lema 4618 tz9.1 4656 scottex 4726 aceq3 4743 ac7g 4759 cardlim 4862 isinfcard 4898 alephval3 4914 cflem 4917 cfval 4918 cflecard 4924 cfsuc 4927 infxpidmlem7 7559 infxpidmlem11 7563 istopg 7598 basis2t 7614 eltg2t 7618 tgss2t 7636 basgen2t 7638 bastop 7641 ntrval 7673 clsval 7674 clscld 7680 clsval2 7682 ntrcls0 7704 isnei 7715 neiint 7716 neips 7724 opnneissb 7725 opnssneib 7726 innei 7733 islp2 7744 cnpimaex 7762 isopn 7856 metcnp 7884 tgioo 7912 resgrprn 8091 issubg 8112 avril1 8779 omls 9241 pjomlt 9264 ococint 9292 spanvalt 9294 hsupval2t 9295 spanclt 9299 chsupsn 9307 shlubt 9349 shsumval2 9355 shs00 9368 chj00 9405 chsscon3t 9418 chlejb1t 9430 chnlet 9432 pjoml2t 9549 pjoml3t 9550 lecmt 9555 stcltr1 10196 mdbrt 10216 dmdmdt 10222 dmdit 10224 dmdbr3 10227 dmdbr4 10228 mdsl1 10243 mdslmd1lem3 10249 mdslmd1lem4 10250 csmdsym 10256 hatomict 10282 chrelat2t 10292 atordt 10310 atcvat4 10319 fiv 10470 inposetlem 10475 inposet 10477 iseuctopg 10488 mapdiscn 10497 fillsb 10546 neifil 10553 fgsb 10555 efilcp 10556 fgsb2 10560 efilcp2 10561 limfillem1OLD 10578 isalg 10624 algi 10631 |
| 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 |