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| Description: Transitivity of subclasses. Theorem 6 of [Suppes] p. 23. |
| Ref | Expression |
|---|---|
| sstr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sstr2 2071 |
. 2
| |
| 2 | 1 | imp 350 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: sstrd 2074 ssdifss 2168 uneqin 2256 sspwuni 2758 ssrnres 3481 funssxp 3638 fssres 3643 ssimaex 3768 dff4 3816 dff2 3817 om00 4206 mapval2 4335 unblem1 4540 unblem2 4541 unblem3 4542 unblem4 4543 isfinite2OLD 4546 rankr1b 4699 rankxplim3 4714 fodom 4798 supxrbnd 6091 supxrgtmnf 6092 supxrre1 6093 supxrre2 6094 uzwo4OLD 6210 uzwo5OLD 6211 iccsupr 6398 uzwo 6455 uzwoOLD 6456 uzwo2 6457 infmssuzle 6465 infmssuzcl 6466 rescncf 7272 infxpidmlem11 7562 tgvalt 7616 unitgt 7623 tgval3t 7625 tgss2t 7637 basgen2t 7639 fctopOLD 7650 cctop 7652 ssnei 7724 opnneiss 7732 cnpco 7769 blssex 7854 opnin 7869 metcnp 7887 lmbrf 7930 iscauf 7939 iscau5 7941 iscaunns 7944 lmsslem 7952 caussi 7954 lmclimnn 7964 bcthlem16 8014 nmoge0 8430 ubthlem6 8534 h2hcau 8849 h2hlm 8850 shsupunss 9315 chsupunss 9316 spanss 9318 shlub 9346 shslub 9358 shmod 9363 mdslj1 10246 mdsl1 10248 mdsl2 10249 cvmd 10251 mdslmd1lem1 10252 mdslmd1lem2 10253 mdslmd2 10257 mdslmd4 10260 atoml 10309 atcvatlem 10312 irredlem2 10318 irred 10321 mdsymlem5 10334 top2usne 10549 fgsb 10570 fgsbOLD 10571 efilcp 10572 efilcpOLD 10573 fisub 10576 fisubOLD 10577 fgsb2 10580 efilcp2 10581 efilcp2OLD 10582 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-12 968 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 981 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-in 2051 df-ss 2053 |