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| Mirrors > Home > ILE Home > Th. List > eqsstrrd | GIF version | ||
| Description: Substitution of equality into a subclass relationship. (Contributed by NM, 25-Apr-2004.) |
| Ref | Expression |
|---|---|
| eqsstrrd.1 | ⊢ (𝜑 → 𝐵 = 𝐴) |
| eqsstrrd.2 | ⊢ (𝜑 → 𝐵 ⊆ 𝐶) |
| Ref | Expression |
|---|---|
| eqsstrrd | ⊢ (𝜑 → 𝐴 ⊆ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqsstrrd.1 | . . 3 ⊢ (𝜑 → 𝐵 = 𝐴) | |
| 2 | 1 | eqcomd 2237 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) |
| 3 | eqsstrrd.2 | . 2 ⊢ (𝜑 → 𝐵 ⊆ 𝐶) | |
| 4 | 2, 3 | eqsstrd 3263 | 1 ⊢ (𝜑 → 𝐴 ⊆ 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ⊆ wss 3200 |
| 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: ssxpbm 5172 ssxp1 5173 ssxp2 5174 suppssof1 6253 tfrlemiubacc 6496 tfr1onlemubacc 6512 tfrcllemubacc 6525 oaword1 6639 phplem4dom 7048 fisseneq 7127 nnnninfeq2 7328 archnqq 7637 hashdmprop2dom 11109 imasaddfnlemg 13402 resmhm2 13576 ringidss 14048 subrg1 14251 subrgdvds 14255 subrguss 14256 subrginv 14257 islss3 14399 lspsnneg 14440 epttop 14820 metequiv2 15226 limccnpcntop 15405 limccnp2lem 15406 limccnp2cntop 15407 umgredgprv 15972 uspgrupgrushgr 16039 usgrumgruspgr 16042 nnsf 16633 |
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