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| Mirrors > Home > ILE Home > Th. List > subrngrng | GIF version | ||
| Description: A subring is a non-unital ring. (Contributed by AV, 14-Feb-2025.) |
| Ref | Expression |
|---|---|
| subrngrng.1 | ⊢ 𝑆 = (𝑅 ↾s 𝐴) |
| Ref | Expression |
|---|---|
| subrngrng | ⊢ (𝐴 ∈ (SubRng‘𝑅) → 𝑆 ∈ Rng) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simp2 1029 | . 2 ⊢ ((𝑅 ∈ Rng ∧ (𝑅 ↾s 𝐴) ∈ Rng ∧ 𝐴 ⊆ (Base‘𝑅)) → (𝑅 ↾s 𝐴) ∈ Rng) | |
| 2 | eqid 2238 | . . 3 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
| 3 | 2 | issubrng 14480 | . 2 ⊢ (𝐴 ∈ (SubRng‘𝑅) ↔ (𝑅 ∈ Rng ∧ (𝑅 ↾s 𝐴) ∈ Rng ∧ 𝐴 ⊆ (Base‘𝑅))) |
| 4 | subrngrng.1 | . . 3 ⊢ 𝑆 = (𝑅 ↾s 𝐴) | |
| 5 | 4 | eleq1i 2304 | . 2 ⊢ (𝑆 ∈ Rng ↔ (𝑅 ↾s 𝐴) ∈ Rng) |
| 6 | 1, 3, 5 | 3imtr4i 201 | 1 ⊢ (𝐴 ∈ (SubRng‘𝑅) → 𝑆 ∈ Rng) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ w3a 1009 = wceq 1402 ∈ wcel 2209 ⊆ wss 3220 ‘cfv 5372 (class class class)co 6075 Basecbs 13330 ↾s cress 13331 Rngcrng 14206 SubRngcsubrng 14478 |
| 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-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-cnex 8260 ax-resscn 8261 ax-1re 8263 ax-addrcl 8266 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-int 3966 df-br 4126 df-opab 4188 df-mpt 4189 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-rn 4780 df-res 4781 df-ima 4782 df-iota 5332 df-fun 5374 df-fn 5375 df-fv 5380 df-ov 6078 df-inn 9284 df-ndx 13333 df-slot 13334 df-base 13336 df-subrng 14479 |
| This theorem is referenced by: subrngsubg 14485 subrngmcl 14490 subsubrng 14495 |
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