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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 3234 |
. 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 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-11 1554 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-in 3206 df-ss 3213 |
| This theorem is referenced by: sstrd 3237 sylan9ss 3240 ssdifss 3337 uneqin 3458 ssindif0im 3554 undifss 3575 ssrnres 5179 relrelss 5263 fco 5500 fssres 5512 ssimaex 5707 fcof 5833 tpostpos2 6431 smores 6458 pmss12g 6844 fidcenumlemr 7154 iccsupr 10201 fimaxq 11092 fsum2d 12014 fsumabs 12044 fprod2d 12202 tgval 13363 tgvalex 13364 subrngintm 14245 subrgintm 14276 ssnei 14894 opnneiss 14901 restdis 14927 tgcnp 14952 blssexps 15172 blssex 15173 mopni3 15227 metss 15237 metcnp3 15254 tgioo 15297 cncfmptid 15340 dvmptfsum 15468 plyss 15481 |
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