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| Mirrors > Home > ILE Home > Th. List > sstr | Unicode version | ||
| Description: Transitivity of subclasses. Theorem 6 of [Suppes] p. 23. (Contributed by NM, 5-Sep-2003.) |
| Ref | Expression |
|---|---|
| sstr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sstr2 3231 |
. 2
| |
| 2 | 1 | imp 124 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-11 1552 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-in 3203 df-ss 3210 |
| This theorem is referenced by: sstrd 3234 sylan9ss 3237 ssdifss 3334 uneqin 3455 ssindif0im 3551 undifss 3572 ssrnres 5171 relrelss 5255 fco 5489 fssres 5501 ssimaex 5695 tpostpos2 6411 smores 6438 pmss12g 6822 fidcenumlemr 7122 iccsupr 10162 fimaxq 11049 fsum2d 11946 fsumabs 11976 fprod2d 12134 tgval 13295 tgvalex 13296 subrngintm 14176 subrgintm 14207 ssnei 14825 opnneiss 14832 restdis 14858 tgcnp 14883 blssexps 15103 blssex 15104 mopni3 15158 metss 15168 metcnp3 15185 tgioo 15228 cncfmptid 15271 dvmptfsum 15399 plyss 15412 |
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