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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 2zrngALT | Structured version Visualization version GIF version | ||
| Description: The ring of integers restricted to the even integers is a non-unital ring, the "ring of even integers". Alternate version of 2zrng 48351, based on a restriction of the field of the complex numbers. The proof is based on the facts that the ring of even integers is an additive abelian group (see 2zrngaabl 48360) and a multiplicative semigroup (see 2zrngmsgrp 48363). (Contributed by AV, 11-Feb-2020.) (New usage is discouraged.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| 2zrng.e | ⊢ 𝐸 = {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} |
| 2zrngbas.r | ⊢ 𝑅 = (ℂfld ↾s 𝐸) |
| 2zrngmmgm.1 | ⊢ 𝑀 = (mulGrp‘𝑅) |
| Ref | Expression |
|---|---|
| 2zrngALT | ⊢ 𝑅 ∈ Rng |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2zrng.e | . . 3 ⊢ 𝐸 = {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} | |
| 2 | 2zrngbas.r | . . 3 ⊢ 𝑅 = (ℂfld ↾s 𝐸) | |
| 3 | 1, 2 | 2zrngaabl 48360 | . 2 ⊢ 𝑅 ∈ Abel |
| 4 | 2zrngmmgm.1 | . . 3 ⊢ 𝑀 = (mulGrp‘𝑅) | |
| 5 | 1, 2, 4 | 2zrngmsgrp 48363 | . 2 ⊢ 𝑀 ∈ Smgrp |
| 6 | elrabi 3638 | . . . . . 6 ⊢ (𝑎 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑎 ∈ ℤ) | |
| 7 | 6 | zcnd 12578 | . . . . 5 ⊢ (𝑎 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑎 ∈ ℂ) |
| 8 | 7, 1 | eleq2s 2849 | . . . 4 ⊢ (𝑎 ∈ 𝐸 → 𝑎 ∈ ℂ) |
| 9 | elrabi 3638 | . . . . . 6 ⊢ (𝑏 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑏 ∈ ℤ) | |
| 10 | 9 | zcnd 12578 | . . . . 5 ⊢ (𝑏 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑏 ∈ ℂ) |
| 11 | 10, 1 | eleq2s 2849 | . . . 4 ⊢ (𝑏 ∈ 𝐸 → 𝑏 ∈ ℂ) |
| 12 | elrabi 3638 | . . . . . 6 ⊢ (𝑦 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑦 ∈ ℤ) | |
| 13 | 12 | zcnd 12578 | . . . . 5 ⊢ (𝑦 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑦 ∈ ℂ) |
| 14 | 13, 1 | eleq2s 2849 | . . . 4 ⊢ (𝑦 ∈ 𝐸 → 𝑦 ∈ ℂ) |
| 15 | adddi 11095 | . . . . 5 ⊢ ((𝑎 ∈ ℂ ∧ 𝑏 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑎 · (𝑏 + 𝑦)) = ((𝑎 · 𝑏) + (𝑎 · 𝑦))) | |
| 16 | adddir 11103 | . . . . 5 ⊢ ((𝑎 ∈ ℂ ∧ 𝑏 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((𝑎 + 𝑏) · 𝑦) = ((𝑎 · 𝑦) + (𝑏 · 𝑦))) | |
| 17 | 15, 16 | jca 511 | . . . 4 ⊢ ((𝑎 ∈ ℂ ∧ 𝑏 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((𝑎 · (𝑏 + 𝑦)) = ((𝑎 · 𝑏) + (𝑎 · 𝑦)) ∧ ((𝑎 + 𝑏) · 𝑦) = ((𝑎 · 𝑦) + (𝑏 · 𝑦)))) |
| 18 | 8, 11, 14, 17 | syl3an 1160 | . . 3 ⊢ ((𝑎 ∈ 𝐸 ∧ 𝑏 ∈ 𝐸 ∧ 𝑦 ∈ 𝐸) → ((𝑎 · (𝑏 + 𝑦)) = ((𝑎 · 𝑏) + (𝑎 · 𝑦)) ∧ ((𝑎 + 𝑏) · 𝑦) = ((𝑎 · 𝑦) + (𝑏 · 𝑦)))) |
| 19 | 18 | rgen3 3177 | . 2 ⊢ ∀𝑎 ∈ 𝐸 ∀𝑏 ∈ 𝐸 ∀𝑦 ∈ 𝐸 ((𝑎 · (𝑏 + 𝑦)) = ((𝑎 · 𝑏) + (𝑎 · 𝑦)) ∧ ((𝑎 + 𝑏) · 𝑦) = ((𝑎 · 𝑦) + (𝑏 · 𝑦))) |
| 20 | 1, 2 | 2zrngbas 48352 | . . 3 ⊢ 𝐸 = (Base‘𝑅) |
| 21 | 1, 2 | 2zrngadd 48353 | . . 3 ⊢ + = (+g‘𝑅) |
| 22 | 1, 2 | 2zrngmul 48361 | . . 3 ⊢ · = (.r‘𝑅) |
| 23 | 20, 4, 21, 22 | isrng 20072 | . 2 ⊢ (𝑅 ∈ Rng ↔ (𝑅 ∈ Abel ∧ 𝑀 ∈ Smgrp ∧ ∀𝑎 ∈ 𝐸 ∀𝑏 ∈ 𝐸 ∀𝑦 ∈ 𝐸 ((𝑎 · (𝑏 + 𝑦)) = ((𝑎 · 𝑏) + (𝑎 · 𝑦)) ∧ ((𝑎 + 𝑏) · 𝑦) = ((𝑎 · 𝑦) + (𝑏 · 𝑦))))) |
| 24 | 3, 5, 19, 23 | mpbir3an 1342 | 1 ⊢ 𝑅 ∈ Rng |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 ∧ w3a 1086 = wceq 1541 ∈ wcel 2111 ∀wral 3047 ∃wrex 3056 {crab 3395 ‘cfv 6481 (class class class)co 7346 ℂcc 11004 + caddc 11009 · cmul 11011 2c2 12180 ℤcz 12468 ↾s cress 17141 Smgrpcsgrp 18626 Abelcabl 19693 mulGrpcmgp 20058 Rngcrng 20070 ℂfldccnfld 21291 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 ax-cnex 11062 ax-resscn 11063 ax-1cn 11064 ax-icn 11065 ax-addcl 11066 ax-addrcl 11067 ax-mulcl 11068 ax-mulrcl 11069 ax-mulcom 11070 ax-addass 11071 ax-mulass 11072 ax-distr 11073 ax-i2m1 11074 ax-1ne0 11075 ax-1rid 11076 ax-rnegex 11077 ax-rrecex 11078 ax-cnre 11079 ax-pre-lttri 11080 ax-pre-lttrn 11081 ax-pre-ltadd 11082 ax-pre-mulgt0 11083 ax-addf 11085 ax-mulf 11086 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-tp 4578 df-op 4580 df-uni 4857 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7797 df-1st 7921 df-2nd 7922 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-1o 8385 df-er 8622 df-en 8870 df-dom 8871 df-sdom 8872 df-fin 8873 df-pnf 11148 df-mnf 11149 df-xr 11150 df-ltxr 11151 df-le 11152 df-sub 11346 df-neg 11347 df-nn 12126 df-2 12188 df-3 12189 df-4 12190 df-5 12191 df-6 12192 df-7 12193 df-8 12194 df-9 12195 df-n0 12382 df-z 12469 df-dec 12589 df-uz 12733 df-fz 13408 df-struct 17058 df-sets 17075 df-slot 17093 df-ndx 17105 df-base 17121 df-ress 17142 df-plusg 17174 df-mulr 17175 df-starv 17176 df-tset 17180 df-ple 17181 df-ds 17183 df-unif 17184 df-0g 17345 df-mgm 18548 df-sgrp 18627 df-mnd 18643 df-grp 18849 df-cmn 19694 df-abl 19695 df-mgp 20059 df-rng 20071 df-ring 20153 df-cring 20154 df-cnfld 21292 |
| This theorem is referenced by: (None) |
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