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Mirrors > Home > MPE Home > Th. List > subrgring | Structured version Visualization version GIF version |
Description: A subring is a ring. (Contributed by Stefan O'Rear, 27-Nov-2014.) |
Ref | Expression |
---|---|
subrgring.1 | ⊢ 𝑆 = (𝑅 ↾s 𝐴) |
Ref | Expression |
---|---|
subrgring | ⊢ (𝐴 ∈ (SubRing‘𝑅) → 𝑆 ∈ Ring) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | subrgring.1 | . 2 ⊢ 𝑆 = (𝑅 ↾s 𝐴) | |
2 | eqid 2798 | . . . . 5 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
3 | eqid 2798 | . . . . 5 ⊢ (1r‘𝑅) = (1r‘𝑅) | |
4 | 2, 3 | issubrg 19528 | . . . 4 ⊢ (𝐴 ∈ (SubRing‘𝑅) ↔ ((𝑅 ∈ Ring ∧ (𝑅 ↾s 𝐴) ∈ Ring) ∧ (𝐴 ⊆ (Base‘𝑅) ∧ (1r‘𝑅) ∈ 𝐴))) |
5 | 4 | simplbi 501 | . . 3 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (𝑅 ∈ Ring ∧ (𝑅 ↾s 𝐴) ∈ Ring)) |
6 | 5 | simprd 499 | . 2 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (𝑅 ↾s 𝐴) ∈ Ring) |
7 | 1, 6 | eqeltrid 2894 | 1 ⊢ (𝐴 ∈ (SubRing‘𝑅) → 𝑆 ∈ Ring) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1538 ∈ wcel 2111 ⊆ wss 3881 ‘cfv 6324 (class class class)co 7135 Basecbs 16475 ↾s cress 16476 1rcur 19244 Ringcrg 19290 SubRingcsubrg 19524 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fv 6332 df-ov 7138 df-subrg 19526 |
This theorem is referenced by: subrgcrng 19532 subrgsubg 19534 subrg1 19538 subrgmcl 19540 subrgsubm 19541 subrguss 19543 subrginv 19544 subrgunit 19546 subrgugrp 19547 issubdrg 19553 subsubrg 19554 resrhm 19557 subdrgint 19575 abvres 19603 sralmod 19952 subrgnzr 20034 gzrngunitlem 20156 gzrngunit 20157 issubassa3 20554 subrgpsr 20657 mplring 20691 subrgmvrf 20702 subrgascl 20737 subrgasclcl 20738 evlssca 20761 evlsvar 20762 evlsgsumadd 20763 evlsvarpw 20766 mpfconst 20773 mpfproj 20774 mpfsubrg 20775 gsumply1subr 20863 ply1ring 20877 evls1sca 20947 evls1gsumadd 20948 evls1varpw 20951 dmatcrng 21107 scmatcrng 21126 scmatsgrp1 21127 scmatsrng1 21128 scmatmhm 21139 scmatrhm 21140 scmatrngiso 21141 m2cpmrhm 21351 isclmp 23702 reefgim 25045 amgmlem 25575 cntrcrng 30747 amgmwlem 45330 |
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