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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 3264 | 1 ⊢ (𝜑 → 𝐴 ⊆ 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ⊆ wss 3201 |
| 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: ssxpbm 5179 ssxp1 5180 ssxp2 5181 suppssof1 6262 tfrlemiubacc 6539 tfr1onlemubacc 6555 tfrcllemubacc 6568 oaword1 6682 phplem4dom 7091 fisseneq 7170 nnnninfeq2 7371 archnqq 7680 hashdmprop2dom 11154 imasaddfnlemg 13460 resmhm2 13634 ringidss 14106 subrg1 14309 subrgdvds 14313 subrguss 14314 subrginv 14315 islss3 14458 lspsnneg 14499 epttop 14884 metequiv2 15290 limccnpcntop 15469 limccnp2lem 15470 limccnp2cntop 15471 umgredgprv 16039 uspgrupgrushgr 16106 usgrumgruspgr 16109 nnsf 16714 |
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