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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 48717, 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 48726) and a multiplicative semigroup (see 2zrngmsgrp 48729). (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 48726 | . 2 ⊢ 𝑅 ∈ Abel |
| 4 | 2zrngmmgm.1 | . . 3 ⊢ 𝑀 = (mulGrp‘𝑅) | |
| 5 | 1, 2, 4 | 2zrngmsgrp 48729 | . 2 ⊢ 𝑀 ∈ Smgrp |
| 6 | elrabi 3630 | . . . . . 6 ⊢ (𝑎 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑎 ∈ ℤ) | |
| 7 | 6 | zcnd 12634 | . . . . 5 ⊢ (𝑎 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑎 ∈ ℂ) |
| 8 | 7, 1 | eleq2s 2854 | . . . 4 ⊢ (𝑎 ∈ 𝐸 → 𝑎 ∈ ℂ) |
| 9 | elrabi 3630 | . . . . . 6 ⊢ (𝑏 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑏 ∈ ℤ) | |
| 10 | 9 | zcnd 12634 | . . . . 5 ⊢ (𝑏 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑏 ∈ ℂ) |
| 11 | 10, 1 | eleq2s 2854 | . . . 4 ⊢ (𝑏 ∈ 𝐸 → 𝑏 ∈ ℂ) |
| 12 | elrabi 3630 | . . . . . 6 ⊢ (𝑦 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑦 ∈ ℤ) | |
| 13 | 12 | zcnd 12634 | . . . . 5 ⊢ (𝑦 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑦 ∈ ℂ) |
| 14 | 13, 1 | eleq2s 2854 | . . . 4 ⊢ (𝑦 ∈ 𝐸 → 𝑦 ∈ ℂ) |
| 15 | adddi 11127 | . . . . 5 ⊢ ((𝑎 ∈ ℂ ∧ 𝑏 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑎 · (𝑏 + 𝑦)) = ((𝑎 · 𝑏) + (𝑎 · 𝑦))) | |
| 16 | adddir 11135 | . . . . 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 1161 | . . 3 ⊢ ((𝑎 ∈ 𝐸 ∧ 𝑏 ∈ 𝐸 ∧ 𝑦 ∈ 𝐸) → ((𝑎 · (𝑏 + 𝑦)) = ((𝑎 · 𝑏) + (𝑎 · 𝑦)) ∧ ((𝑎 + 𝑏) · 𝑦) = ((𝑎 · 𝑦) + (𝑏 · 𝑦)))) |
| 19 | 18 | rgen3 3182 | . 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 48718 | . . 3 ⊢ 𝐸 = (Base‘𝑅) |
| 21 | 1, 2 | 2zrngadd 48719 | . . 3 ⊢ + = (+g‘𝑅) |
| 22 | 1, 2 | 2zrngmul 48727 | . . 3 ⊢ · = (.r‘𝑅) |
| 23 | 20, 4, 21, 22 | isrng 20135 | . 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 1343 | 1 ⊢ 𝑅 ∈ Rng |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ∀wral 3051 ∃wrex 3061 {crab 3389 ‘cfv 6498 (class class class)co 7367 ℂcc 11036 + caddc 11041 · cmul 11043 2c2 12236 ℤcz 12524 ↾s cress 17200 Smgrpcsgrp 18686 Abelcabl 19756 mulGrpcmgp 20121 Rngcrng 20133 ℂfldccnfld 21352 |
| 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 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-addf 11117 ax-mulf 11118 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 df-9 12251 df-n0 12438 df-z 12525 df-dec 12645 df-uz 12789 df-fz 13462 df-struct 17117 df-sets 17134 df-slot 17152 df-ndx 17164 df-base 17180 df-ress 17201 df-plusg 17233 df-mulr 17234 df-starv 17235 df-tset 17239 df-ple 17240 df-ds 17242 df-unif 17243 df-0g 17404 df-mgm 18608 df-sgrp 18687 df-mnd 18703 df-grp 18912 df-cmn 19757 df-abl 19758 df-mgp 20122 df-rng 20134 df-ring 20216 df-cring 20217 df-cnfld 21353 |
| This theorem is referenced by: (None) |
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