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Theorem iscrngd 18793

Description: Properties that determine a commutative ring. (Contributed by Mario Carneiro, 7-Jan-2015.)

**Hypotheses**
Ref	Expression
isringd.b	⊢ (𝜑 → 𝐵 = (Base‘𝑅))
isringd.p	⊢ (𝜑 → + = (+_g‘𝑅))
isringd.t	⊢ (𝜑 → · = (._r‘𝑅))
isringd.g	⊢ (𝜑 → 𝑅 ∈ Grp)
isringd.c	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 · 𝑦) ∈ 𝐵)
isringd.a	⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → ((𝑥 · 𝑦) · 𝑧) = (𝑥 · (𝑦 · 𝑧)))
isringd.d	⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → (𝑥 · (𝑦 + 𝑧)) = ((𝑥 · 𝑦) + (𝑥 · 𝑧)))
isringd.e	⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → ((𝑥 + 𝑦) · 𝑧) = ((𝑥 · 𝑧) + (𝑦 · 𝑧)))
isringd.u	⊢ (𝜑 → 1 ∈ 𝐵)
isringd.i	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ( 1 · 𝑥) = 𝑥)
isringd.h	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑥 · 1 ) = 𝑥)
iscrngd.c	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 · 𝑦) = (𝑦 · 𝑥))

**Assertion**
Ref	Expression
iscrngd	⊢ (𝜑 → 𝑅 ∈ CRing)

Distinct variable groups: 𝑥, 1 𝑥,𝑦,𝑧,𝐵 𝜑,𝑥,𝑦,𝑧 𝑥,𝑅,𝑦,𝑧 Allowed substitution hints: + (𝑥,𝑦,𝑧) · (𝑥,𝑦,𝑧) 1 (𝑦,𝑧)

**Proof of Theorem iscrngd**
Step	Hyp	Ref	Expression
1		isringd.b	. . 3 ⊢ (𝜑 → 𝐵 = (Base‘𝑅))
2		isringd.p	. . 3 ⊢ (𝜑 → + = (+_g‘𝑅))
3		isringd.t	. . 3 ⊢ (𝜑 → · = (._r‘𝑅))
4		isringd.g	. . 3 ⊢ (𝜑 → 𝑅 ∈ Grp)
5		isringd.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 · 𝑦) ∈ 𝐵)
6		isringd.a	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → ((𝑥 · 𝑦) · 𝑧) = (𝑥 · (𝑦 · 𝑧)))
7		isringd.d	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → (𝑥 · (𝑦 + 𝑧)) = ((𝑥 · 𝑦) + (𝑥 · 𝑧)))
8		isringd.e	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → ((𝑥 + 𝑦) · 𝑧) = ((𝑥 · 𝑧) + (𝑦 · 𝑧)))
9		isringd.u	. . 3 ⊢ (𝜑 → 1 ∈ 𝐵)
10		isringd.i	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ( 1 · 𝑥) = 𝑥)
11		isringd.h	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑥 · 1 ) = 𝑥)
12	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11	isringd 18792	. 2 ⊢ (𝜑 → 𝑅 ∈ Ring)
13		eqid 2770	. . . . 5 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
14		eqid 2770	. . . . 5 ⊢ (Base‘𝑅) = (Base‘𝑅)
15	13, 14	mgpbas 18702	. . . 4 ⊢ (Base‘𝑅) = (Base‘(mulGrp‘𝑅))
16	1, 15	syl6eq 2820	. . 3 ⊢ (𝜑 → 𝐵 = (Base‘(mulGrp‘𝑅)))
17		eqid 2770	. . . . 5 ⊢ (._r‘𝑅) = (._r‘𝑅)
18	13, 17	mgpplusg 18700	. . . 4 ⊢ (._r‘𝑅) = (+_g‘(mulGrp‘𝑅))
19	3, 18	syl6eq 2820	. . 3 ⊢ (𝜑 → · = (+_g‘(mulGrp‘𝑅)))
20	16, 19, 5, 6, 9, 10, 11	ismndd 17520	. . 3 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ Mnd)
21		iscrngd.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 · 𝑦) = (𝑦 · 𝑥))
22	16, 19, 20, 21	iscmnd 18411	. 2 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ CMnd)
23	13	iscrng 18761	. 2 ⊢ (𝑅 ∈ CRing ↔ (𝑅 ∈ Ring ∧ (mulGrp‘𝑅) ∈ CMnd))
24	12, 22, 23	sylanbrc 564	1 ⊢ (𝜑 → 𝑅 ∈ CRing)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 382 ∧ w3a 1070 = wceq 1630 ∈ wcel 2144 ‘cfv 6031 (class class class)co 6792 Basecbs 16063 +_gcplusg 16148 ._rcmulr 16149 Grpcgrp 17629 CMndccmn 18399 mulGrpcmgp 18696 Ringcrg 18754 CRingccrg 18755

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1869 ax-4 1884 ax-5 1990 ax-6 2056 ax-7 2092 ax-8 2146 ax-9 2153 ax-10 2173 ax-11 2189 ax-12 2202 ax-13 2407 ax-ext 2750 ax-sep 4912 ax-nul 4920 ax-pow 4971 ax-pr 5034 ax-un 7095 ax-cnex 10193 ax-resscn 10194 ax-1cn 10195 ax-icn 10196 ax-addcl 10197 ax-addrcl 10198 ax-mulcl 10199 ax-mulrcl 10200 ax-mulcom 10201 ax-addass 10202 ax-mulass 10203 ax-distr 10204 ax-i2m1 10205 ax-1ne0 10206 ax-1rid 10207 ax-rnegex 10208 ax-rrecex 10209 ax-cnre 10210 ax-pre-lttri 10211 ax-pre-lttrn 10212 ax-pre-ltadd 10213 ax-pre-mulgt0 10214

This theorem depends on definitions: df-bi 197 df-an 383 df-or 827 df-3or 1071 df-3an 1072 df-tru 1633 df-ex 1852 df-nf 1857 df-sb 2049 df-eu 2621 df-mo 2622 df-clab 2757 df-cleq 2763 df-clel 2766 df-nfc 2901 df-ne 2943 df-nel 3046 df-ral 3065 df-rex 3066 df-reu 3067 df-rab 3069 df-v 3351 df-sbc 3586 df-csb 3681 df-dif 3724 df-un 3726 df-in 3728 df-ss 3735 df-pss 3737 df-nul 4062 df-if 4224 df-pw 4297 df-sn 4315 df-pr 4317 df-tp 4319 df-op 4321 df-uni 4573 df-iun 4654 df-br 4785 df-opab 4845 df-mpt 4862 df-tr 4885 df-id 5157 df-eprel 5162 df-po 5170 df-so 5171 df-fr 5208 df-we 5210 df-xp 5255 df-rel 5256 df-cnv 5257 df-co 5258 df-dm 5259 df-rn 5260 df-res 5261 df-ima 5262 df-pred 5823 df-ord 5869 df-on 5870 df-lim 5871 df-suc 5872 df-iota 5994 df-fun 6033 df-fn 6034 df-f 6035 df-f1 6036 df-fo 6037 df-f1o 6038 df-fv 6039 df-riota 6753 df-ov 6795 df-oprab 6796 df-mpt2 6797 df-om 7212 df-wrecs 7558 df-recs 7620 df-rdg 7658 df-er 7895 df-en 8109 df-dom 8110 df-sdom 8111 df-pnf 10277 df-mnf 10278 df-xr 10279 df-ltxr 10280 df-le 10281 df-sub 10469 df-neg 10470 df-nn 11222 df-2 11280 df-ndx 16066 df-slot 16067 df-base 16069 df-sets 16070 df-plusg 16161 df-mgm 17449 df-sgrp 17491 df-mnd 17502 df-cmn 18401 df-mgp 18697 df-ring 18756 df-cring 18757

This theorem is referenced by: cncrng 19981

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