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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 5226 ssxp1 5227 ssxp2 5228 suppssof1 6324 tfrlemiubacc 6605 tfr1onlemubacc 6621 tfrcllemubacc 6634 oaword1 6748 phplem4dom 7167 fisseneq 7246 nnnninfeq2 7475 archnqq 7790 hashdmprop2dom 11318 imasaddfnlemg 13694 resmhm2 13854 cmnsubm 14202 ringidss 14441 subrg1 14648 subrgdvds 14652 subrguss 14653 subrginv 14654 islss3 14825 lspsnneg 14866 epttop 15316 metequiv2 15722 limccnpcntop 15901 limccnp2lem 15902 limccnp2cntop 15903 umgredgprv 16561 uspgrupgrushgr 16628 usgrumgruspgr 16631 nnsf 17254 |
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