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Theorem iscrngd 20221

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 20220	. 2 ⊢ (𝜑 → 𝑅 ∈ Ring)
13		eqid 2728	. . . . 5 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
14		eqid 2728	. . . . 5 ⊢ (Base‘𝑅) = (Base‘𝑅)
15	13, 14	mgpbas 20073	. . . 4 ⊢ (Base‘𝑅) = (Base‘(mulGrp‘𝑅))
16	1, 15	eqtrdi 2784	. . 3 ⊢ (𝜑 → 𝐵 = (Base‘(mulGrp‘𝑅)))
17		eqid 2728	. . . . 5 ⊢ (._r‘𝑅) = (._r‘𝑅)
18	13, 17	mgpplusg 20071	. . . 4 ⊢ (._r‘𝑅) = (+_g‘(mulGrp‘𝑅))
19	3, 18	eqtrdi 2784	. . 3 ⊢ (𝜑 → · = (+_g‘(mulGrp‘𝑅)))
20	16, 19, 5, 6, 9, 10, 11	ismndd 18709	. . 3 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ Mnd)
21		iscrngd.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 · 𝑦) = (𝑦 · 𝑥))
22	16, 19, 20, 21	iscmnd 19742	. 2 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ CMnd)
23	13	iscrng 20173	. 2 ⊢ (𝑅 ∈ CRing ↔ (𝑅 ∈ Ring ∧ (mulGrp‘𝑅) ∈ CMnd))
24	12, 22, 23	sylanbrc 582	1 ⊢ (𝜑 → 𝑅 ∈ CRing)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1534 ∈ wcel 2099 ‘cfv 6542 (class class class)co 7414 Basecbs 17173 +_gcplusg 17226 ._rcmulr 17227 Grpcgrp 18883 CMndccmn 19728 mulGrpcmgp 20067 Ringcrg 20166 CRingccrg 20167

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-cnex 11188 ax-resscn 11189 ax-1cn 11190 ax-icn 11191 ax-addcl 11192 ax-addrcl 11193 ax-mulcl 11194 ax-mulrcl 11195 ax-mulcom 11196 ax-addass 11197 ax-mulass 11198 ax-distr 11199 ax-i2m1 11200 ax-1ne0 11201 ax-1rid 11202 ax-rnegex 11203 ax-rrecex 11204 ax-cnre 11205 ax-pre-lttri 11206 ax-pre-lttrn 11207 ax-pre-ltadd 11208 ax-pre-mulgt0 11209

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2937 df-nel 3043 df-ral 3058 df-rex 3067 df-reu 3373 df-rab 3429 df-v 3472 df-sbc 3776 df-csb 3891 df-dif 3948 df-un 3950 df-in 3952 df-ss 3962 df-pss 3964 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7865 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-er 8718 df-en 8958 df-dom 8959 df-sdom 8960 df-pnf 11274 df-mnf 11275 df-xr 11276 df-ltxr 11277 df-le 11278 df-sub 11470 df-neg 11471 df-nn 12237 df-2 12299 df-sets 17126 df-slot 17144 df-ndx 17156 df-base 17174 df-plusg 17239 df-mgm 18593 df-sgrp 18672 df-mnd 18688 df-cmn 19730 df-mgp 20068 df-ring 20168 df-cring 20169

This theorem is referenced by: cncrng 21309 cncrngOLD 21310 rloccring 32978

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