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Theorem iscrngd 20268

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 20267	. 2 ⊢ (𝜑 → 𝑅 ∈ Ring)
13		eqid 2737	. . . . 5 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
14		eqid 2737	. . . . 5 ⊢ (Base‘𝑅) = (Base‘𝑅)
15	13, 14	mgpbas 20121	. . . 4 ⊢ (Base‘𝑅) = (Base‘(mulGrp‘𝑅))
16	1, 15	eqtrdi 2788	. . 3 ⊢ (𝜑 → 𝐵 = (Base‘(mulGrp‘𝑅)))
17		eqid 2737	. . . . 5 ⊢ (._r‘𝑅) = (._r‘𝑅)
18	13, 17	mgpplusg 20120	. . . 4 ⊢ (._r‘𝑅) = (+_g‘(mulGrp‘𝑅))
19	3, 18	eqtrdi 2788	. . 3 ⊢ (𝜑 → · = (+_g‘(mulGrp‘𝑅)))
20	16, 19, 5, 6, 9, 10, 11	ismndd 18719	. . 3 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ Mnd)
21		iscrngd.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 · 𝑦) = (𝑦 · 𝑥))
22	16, 19, 20, 21	iscmnd 19764	. 2 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ CMnd)
23	13	iscrng 20216	. 2 ⊢ (𝑅 ∈ CRing ↔ (𝑅 ∈ Ring ∧ (mulGrp‘𝑅) ∈ CMnd))
24	12, 22, 23	sylanbrc 584	1 ⊢ (𝜑 → 𝑅 ∈ CRing)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ‘cfv 6494 (class class class)co 7362 Basecbs 17174 +_gcplusg 17215 ._rcmulr 17216 Grpcgrp 18904 CMndccmn 19750 mulGrpcmgp 20116 Ringcrg 20209 CRingccrg 20210

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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5304 ax-pr 5372 ax-un 7684 ax-cnex 11089 ax-resscn 11090 ax-1cn 11091 ax-icn 11092 ax-addcl 11093 ax-addrcl 11094 ax-mulcl 11095 ax-mulrcl 11096 ax-mulcom 11097 ax-addass 11098 ax-mulass 11099 ax-distr 11100 ax-i2m1 11101 ax-1ne0 11102 ax-1rid 11103 ax-rnegex 11104 ax-rrecex 11105 ax-cnre 11106 ax-pre-lttri 11107 ax-pre-lttrn 11108 ax-pre-ltadd 11109 ax-pre-mulgt0 11110

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5521 df-eprel 5526 df-po 5534 df-so 5535 df-fr 5579 df-we 5581 df-xp 5632 df-rel 5633 df-cnv 5634 df-co 5635 df-dm 5636 df-rn 5637 df-res 5638 df-ima 5639 df-pred 6261 df-ord 6322 df-on 6323 df-lim 6324 df-suc 6325 df-iota 6450 df-fun 6496 df-fn 6497 df-f 6498 df-f1 6499 df-fo 6500 df-f1o 6501 df-fv 6502 df-riota 7319 df-ov 7365 df-oprab 7366 df-mpo 7367 df-om 7813 df-2nd 7938 df-frecs 8226 df-wrecs 8257 df-recs 8306 df-rdg 8344 df-er 8638 df-en 8889 df-dom 8890 df-sdom 8891 df-pnf 11176 df-mnf 11177 df-xr 11178 df-ltxr 11179 df-le 11180 df-sub 11374 df-neg 11375 df-nn 12170 df-2 12239 df-sets 17129 df-slot 17147 df-ndx 17159 df-base 17175 df-plusg 17228 df-mgm 18603 df-sgrp 18682 df-mnd 18698 df-cmn 19752 df-mgp 20117 df-ring 20211 df-cring 20212

This theorem is referenced by: cncrng 21382 cncrngOLD 21383 rloccring 33350

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