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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 2236 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) |
| 3 | eqsstrrd.2 | . 2 ⊢ (𝜑 → 𝐵 ⊆ 𝐶) | |
| 4 | 2, 3 | eqsstrd 3262 | 1 ⊢ (𝜑 → 𝐴 ⊆ 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ⊆ wss 3199 |
| 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 2212 |
| This theorem depends on definitions: df-bi 117 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-in 3205 df-ss 3212 |
| This theorem is referenced by: ssxpbm 5171 ssxp1 5172 ssxp2 5173 suppssof1 6255 tfrlemiubacc 6498 tfr1onlemubacc 6514 tfrcllemubacc 6527 oaword1 6641 phplem4dom 7050 fisseneq 7129 nnnninfeq2 7330 archnqq 7639 hashdmprop2dom 11111 imasaddfnlemg 13417 resmhm2 13591 ringidss 14063 subrg1 14266 subrgdvds 14270 subrguss 14271 subrginv 14272 islss3 14414 lspsnneg 14455 epttop 14840 metequiv2 15246 limccnpcntop 15425 limccnp2lem 15426 limccnp2cntop 15427 umgredgprv 15992 uspgrupgrushgr 16059 usgrumgruspgr 16062 nnsf 16665 |
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