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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 3235 |
. 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 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-11 1555 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-in 3207 df-ss 3214 |
| This theorem is referenced by: sstrd 3238 sylan9ss 3241 ssdifss 3339 uneqin 3460 ssindif0im 3556 undifss 3577 ssrnres 5186 relrelss 5270 fco 5507 fssres 5520 ssimaex 5716 fcof 5841 tpostpos2 6474 smores 6501 pmss12g 6887 fidcenumlemr 7197 iccsupr 10245 fimaxq 11137 fsum2d 12059 fsumabs 12089 fprod2d 12247 tgval 13408 tgvalex 13409 subrngintm 14290 subrgintm 14321 ssnei 14945 opnneiss 14952 restdis 14978 tgcnp 15003 blssexps 15223 blssex 15224 mopni3 15278 metss 15288 metcnp3 15305 tgioo 15348 cncfmptid 15391 dvmptfsum 15519 plyss 15532 |
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