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| Description: Equality theorem for the subclass relationship. |
| Ref | Expression |
|---|---|
| sseq2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sstr2 2067 |
. . . 4
| |
| 2 | 1 | com12 11 |
. . 3
|
| 3 | sstr2 2067 |
. . . 4
| |
| 4 | 3 | com12 11 |
. . 3
|
| 5 | 2, 4 | anim12i 333 |
. 2
|
| 6 | eqss 2073 |
. 2
| |
| 7 | bi 514 |
. 2
| |
| 8 | 5, 6, 7 | 3imtr4 219 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: sseq12 2080 sseq2i 2082 sseq2d 2085 eqimss 2105 psseq2 2132 sseq0 2300 un00 2302 disjpss 2315 pweq 2399 ssuni 2517 ssintab 2545 ssintub 2546 intmin 2548 treq 2681 ssexg 2716 intabs 2728 iunpw 2909 ordunidif 3000 ordssun 3074 limomss 3132 findsg 3152 tfindsg 3157 unixp0 3510 fununi 3555 funcnvuni 3556 feq3 3614 feq23 3615 ssimaexg 3760 oawordeu 4179 oawordexr 4180 ereq 4257 domeng 4368 undom 4424 sbthlem4 4436 sbthlem5 4437 mapdom2lem 4479 php3 4501 abfii4 4544 inf3lema 4589 tz9.1 4626 scottex 4696 aceq3 4713 ac7g 4729 cardlim 4831 isinfcard 4867 alephval3 4883 cflem 4885 cfval 4886 cflecard 4892 cfsuc 4895 infxpidmlem7 7509 infxpidmlem11 7513 istopg 7546 basis2t 7565 eltg2t 7569 tgss2t 7587 basgen2t 7589 bastop 7592 ntrval 7626 clsval 7627 clscld 7633 clsval2 7635 ntrcls0 7657 isnei 7668 neiint 7669 neips 7677 opnneissb 7678 opnssneib 7679 innei 7686 islp2 7697 cnpimaex 7715 isopn 7811 metcnp 7839 tgioo 7867 resgrprn 8045 issubg 8068 avril1 8723 omls 9184 pjomlt 9207 ococint 9235 spanvalt 9237 hsupval2t 9238 spanclt 9242 chsupsn 9250 shlubt 9292 shsumval2 9298 shs00 9311 chj00 9348 chsscon3t 9361 chlejb1t 9373 chnlet 9375 pjoml2t 9494 pjoml3t 9495 lecmt 9500 stcltr1 10139 mdbrt 10159 dmdmdt 10165 dmdit 10167 dmdbr3 10170 dmdbr4 10171 mdsl1 10185 mdslmd1lem3 10191 mdslmd1lem4 10192 csmdsym 10198 hatomict 10224 chrelat2t 10234 atordt 10252 atcvat4 10261 fiv 10410 iseuctopg 10425 mapdiscn 10434 isfil 10469 fillsb 10471 neifil 10478 fgsb 10480 efilcp 10481 fgsb2 10485 efilcp2 10486 isalg 10533 algi 10540 |
| 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 |