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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 2244 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) |
| 3 | eqsstrrd.2 | . 2 ⊢ (𝜑 → 𝐵 ⊆ 𝐶) | |
| 4 | 2, 3 | eqsstrd 3284 | 1 ⊢ (𝜑 → 𝐴 ⊆ 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ⊆ wss 3220 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 |
| This theorem is used by: ssxpbm 5223 ssxp1 5224 ssxp2 5225 suppssof1 6320 tfrlemiubacc 6601 tfr1onlemubacc 6617 tfrcllemubacc 6630 oaword1 6744 phplem4dom 7163 fisseneq 7242 nnnninfeq2 7469 archnqq 7784 hashdmprop2dom 11310 imasaddfnlemg 13684 resmhm2 13844 cmnsubm 14161 ringidss 14383 subrg1 14588 subrgdvds 14592 subrguss 14593 subrginv 14594 islss3 14765 lspsnneg 14806 epttop 15240 metequiv2 15646 limccnpcntop 15825 limccnp2lem 15826 limccnp2cntop 15827 umgredgprv 16454 uspgrupgrushgr 16521 usgrumgruspgr 16524 nnsf 17146 |
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