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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 48733, 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 48742) and a multiplicative semigroup (see 2zrngmsgrp 48745). (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 48742 | . 2 ⊢ 𝑅 ∈ Abel |
| 4 | 2zrngmmgm.1 | . . 3 ⊢ 𝑀 = (mulGrp‘𝑅) | |
| 5 | 1, 2, 4 | 2zrngmsgrp 48745 | . 2 ⊢ 𝑀 ∈ Smgrp |
| 6 | elrabi 3631 | . . . . . 6 ⊢ (𝑎 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑎 ∈ ℤ) | |
| 7 | 6 | zcnd 12629 | . . . . 5 ⊢ (𝑎 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑎 ∈ ℂ) |
| 8 | 7, 1 | eleq2s 2855 | . . . 4 ⊢ (𝑎 ∈ 𝐸 → 𝑎 ∈ ℂ) |
| 9 | elrabi 3631 | . . . . . 6 ⊢ (𝑏 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑏 ∈ ℤ) | |
| 10 | 9 | zcnd 12629 | . . . . 5 ⊢ (𝑏 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑏 ∈ ℂ) |
| 11 | 10, 1 | eleq2s 2855 | . . . 4 ⊢ (𝑏 ∈ 𝐸 → 𝑏 ∈ ℂ) |
| 12 | elrabi 3631 | . . . . . 6 ⊢ (𝑦 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑦 ∈ ℤ) | |
| 13 | 12 | zcnd 12629 | . . . . 5 ⊢ (𝑦 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑦 ∈ ℂ) |
| 14 | 13, 1 | eleq2s 2855 | . . . 4 ⊢ (𝑦 ∈ 𝐸 → 𝑦 ∈ ℂ) |
| 15 | adddi 11122 | . . . . 5 ⊢ ((𝑎 ∈ ℂ ∧ 𝑏 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑎 · (𝑏 + 𝑦)) = ((𝑎 · 𝑏) + (𝑎 · 𝑦))) | |
| 16 | adddir 11130 | . . . . 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 3183 | . 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 48734 | . . 3 ⊢ 𝐸 = (Base‘𝑅) |
| 21 | 1, 2 | 2zrngadd 48735 | . . 3 ⊢ + = (+g‘𝑅) |
| 22 | 1, 2 | 2zrngmul 48743 | . . 3 ⊢ · = (.r‘𝑅) |
| 23 | 20, 4, 21, 22 | isrng 20130 | . 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 3052 ∃wrex 3062 {crab 3390 ‘cfv 6494 (class class class)co 7362 ℂcc 11031 + caddc 11036 · cmul 11038 2c2 12231 ℤcz 12519 ↾s cress 17195 Smgrpcsgrp 18681 Abelcabl 19751 mulGrpcmgp 20116 Rngcrng 20128 ℂfldccnfld 21348 |
| 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 ax-addf 11112 ax-mulf 11113 |
| 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-rmo 3343 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-tp 4573 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-1st 7937 df-2nd 7938 df-frecs 8226 df-wrecs 8257 df-recs 8306 df-rdg 8344 df-1o 8400 df-er 8638 df-en 8889 df-dom 8890 df-sdom 8891 df-fin 8892 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-3 12240 df-4 12241 df-5 12242 df-6 12243 df-7 12244 df-8 12245 df-9 12246 df-n0 12433 df-z 12520 df-dec 12640 df-uz 12784 df-fz 13457 df-struct 17112 df-sets 17129 df-slot 17147 df-ndx 17159 df-base 17175 df-ress 17196 df-plusg 17228 df-mulr 17229 df-starv 17230 df-tset 17234 df-ple 17235 df-ds 17237 df-unif 17238 df-0g 17399 df-mgm 18603 df-sgrp 18682 df-mnd 18698 df-grp 18907 df-cmn 19752 df-abl 19753 df-mgp 20117 df-rng 20129 df-ring 20211 df-cring 20212 df-cnfld 21349 |
| This theorem is referenced by: (None) |
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