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| Description: Transitivity of subclasses. Theorem 6 of [Suppes] p. 23. |
| Ref | Expression |
|---|---|
| sstr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sstr2 2067 |
. 2
| |
| 2 | 1 | imp 350 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: sstrd 2070 ssdifss 2164 uneqin 2252 sspwuni 2753 ssrnres 3473 funssxp 3629 fssres 3634 ssimaex 3759 dff4 3807 dff2 3808 om00 4196 mapval2 4325 unblem1 4523 unblem2 4524 unblem3 4525 unblem4 4526 isfinite2 4529 rankr1b 4679 rankxplim3 4694 fodom 4778 supxrbnd 6046 supxrgtmnf 6047 supxrre1 6048 supxrre2 6049 uzwo4OLD 6166 uzwo5OLD 6167 iccsupr 6339 uzwo 6395 uzwoOLD 6396 uzwo2 6397 infmssuzle 6405 infmssuzcl 6406 rescncf 7215 infxpidmlem11 7513 tgvalt 7566 unitgt 7573 tgval3t 7575 tgss2t 7587 basgen2t 7589 fctop 7600 cctop 7602 ssnei 7674 opnneiss 7682 cnpco 7719 blssex 7806 opnin 7821 metcnp 7839 lmbrf 7882 iscauf 7891 iscau5 7893 lmsslem 7903 caussi 7905 lmclimnn 7915 bcthlem16 7964 nmoge0 8375 ubthlem6 8478 h2hcau 8788 h2hlm 8789 shsupunss 9253 chsupunss 9254 spanss 9256 shlub 9284 shslub 9296 shmod 9301 mdslj1 10183 mdsl1 10185 mdsl2 10186 cvmd 10188 mdslmd1lem1 10189 mdslmd1lem2 10190 mdslmd2 10194 mdslmd4 10197 atoml 10246 atcvatlem 10249 irredlem2 10255 irred 10258 mdsymlem5 10271 fgsb 10480 efilcp 10481 fisub 10483 fgsb2 10485 efilcp2 10486 |
| 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 |