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Theorem iscrngd 19339

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 19338	. 2 ⊢ (𝜑 → 𝑅 ∈ Ring)
13		eqid 2824	. . . . 5 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
14		eqid 2824	. . . . 5 ⊢ (Base‘𝑅) = (Base‘𝑅)
15	13, 14	mgpbas 19248	. . . 4 ⊢ (Base‘𝑅) = (Base‘(mulGrp‘𝑅))
16	1, 15	syl6eq 2875	. . 3 ⊢ (𝜑 → 𝐵 = (Base‘(mulGrp‘𝑅)))
17		eqid 2824	. . . . 5 ⊢ (._r‘𝑅) = (._r‘𝑅)
18	13, 17	mgpplusg 19246	. . . 4 ⊢ (._r‘𝑅) = (+_g‘(mulGrp‘𝑅))
19	3, 18	syl6eq 2875	. . 3 ⊢ (𝜑 → · = (+_g‘(mulGrp‘𝑅)))
20	16, 19, 5, 6, 9, 10, 11	ismndd 17936	. . 3 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ Mnd)
21		iscrngd.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 · 𝑦) = (𝑦 · 𝑥))
22	16, 19, 20, 21	iscmnd 18922	. 2 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ CMnd)
23	13	iscrng 19307	. 2 ⊢ (𝑅 ∈ CRing ↔ (𝑅 ∈ Ring ∧ (mulGrp‘𝑅) ∈ CMnd))
24	12, 22, 23	sylanbrc 585	1 ⊢ (𝜑 → 𝑅 ∈ CRing)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 398 ∧ w3a 1083 = wceq 1536 ∈ wcel 2113 ‘cfv 6358 (class class class)co 7159 Basecbs 16486 +_gcplusg 16568 ._rcmulr 16569 Grpcgrp 18106 CMndccmn 18909 mulGrpcmgp 19242 Ringcrg 19300 CRingccrg 19301

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-sep 5206 ax-nul 5213 ax-pow 5269 ax-pr 5333 ax-un 7464 ax-cnex 10596 ax-resscn 10597 ax-1cn 10598 ax-icn 10599 ax-addcl 10600 ax-addrcl 10601 ax-mulcl 10602 ax-mulrcl 10603 ax-mulcom 10604 ax-addass 10605 ax-mulass 10606 ax-distr 10607 ax-i2m1 10608 ax-1ne0 10609 ax-1rid 10610 ax-rnegex 10611 ax-rrecex 10612 ax-cnre 10613 ax-pre-lttri 10614 ax-pre-lttrn 10615 ax-pre-ltadd 10616 ax-pre-mulgt0 10617

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-ne 3020 df-nel 3127 df-ral 3146 df-rex 3147 df-reu 3148 df-rab 3150 df-v 3499 df-sbc 3776 df-csb 3887 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-pss 3957 df-nul 4295 df-if 4471 df-pw 4544 df-sn 4571 df-pr 4573 df-tp 4575 df-op 4577 df-uni 4842 df-iun 4924 df-br 5070 df-opab 5132 df-mpt 5150 df-tr 5176 df-id 5463 df-eprel 5468 df-po 5477 df-so 5478 df-fr 5517 df-we 5519 df-xp 5564 df-rel 5565 df-cnv 5566 df-co 5567 df-dm 5568 df-rn 5569 df-res 5570 df-ima 5571 df-pred 6151 df-ord 6197 df-on 6198 df-lim 6199 df-suc 6200 df-iota 6317 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7117 df-ov 7162 df-oprab 7163 df-mpo 7164 df-om 7584 df-wrecs 7950 df-recs 8011 df-rdg 8049 df-er 8292 df-en 8513 df-dom 8514 df-sdom 8515 df-pnf 10680 df-mnf 10681 df-xr 10682 df-ltxr 10683 df-le 10684 df-sub 10875 df-neg 10876 df-nn 11642 df-2 11703 df-ndx 16489 df-slot 16490 df-base 16492 df-sets 16493 df-plusg 16581 df-mgm 17855 df-sgrp 17904 df-mnd 17915 df-cmn 18911 df-mgp 19243 df-ring 19302 df-cring 19303

This theorem is referenced by: cncrng 20569

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