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Mirrors > Home > MPE Home > Th. List > Mathboxes > cznnring | Structured version Visualization version GIF version |
Description: The ring constructed from a ℤ/nℤ structure with 1 < 𝑛 by replacing the (multiplicative) ring operation by a constant operation is not a unital ring. (Contributed by AV, 17-Feb-2020.) |
Ref | Expression |
---|---|
cznrng.y | ⊢ 𝑌 = (ℤ/nℤ‘𝑁) |
cznrng.b | ⊢ 𝐵 = (Base‘𝑌) |
cznrng.x | ⊢ 𝑋 = (𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉) |
cznrng.0 | ⊢ 0 = (0g‘𝑌) |
Ref | Expression |
---|---|
cznnring | ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐶 ∈ 𝐵) → 𝑋 ∉ Ring) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2738 | . . . . . . 7 ⊢ (mulGrp‘𝑋) = (mulGrp‘𝑋) | |
2 | cznrng.y | . . . . . . . 8 ⊢ 𝑌 = (ℤ/nℤ‘𝑁) | |
3 | cznrng.b | . . . . . . . 8 ⊢ 𝐵 = (Base‘𝑌) | |
4 | cznrng.x | . . . . . . . 8 ⊢ 𝑋 = (𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉) | |
5 | 2, 3, 4 | cznrnglem 45511 | . . . . . . 7 ⊢ 𝐵 = (Base‘𝑋) |
6 | 1, 5 | mgpbas 19726 | . . . . . 6 ⊢ 𝐵 = (Base‘(mulGrp‘𝑋)) |
7 | 4 | fveq2i 6777 | . . . . . . . 8 ⊢ (mulGrp‘𝑋) = (mulGrp‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉)) |
8 | 2 | fvexi 6788 | . . . . . . . . 9 ⊢ 𝑌 ∈ V |
9 | 3 | fvexi 6788 | . . . . . . . . . 10 ⊢ 𝐵 ∈ V |
10 | 9, 9 | mpoex 7920 | . . . . . . . . 9 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶) ∈ V |
11 | mulrid 17004 | . . . . . . . . . 10 ⊢ .r = Slot (.r‘ndx) | |
12 | 11 | setsid 16909 | . . . . . . . . 9 ⊢ ((𝑌 ∈ V ∧ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶) ∈ V) → (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶) = (.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))) |
13 | 8, 10, 12 | mp2an 689 | . . . . . . . 8 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶) = (.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉)) |
14 | 7, 13 | mgpplusg 19724 | . . . . . . 7 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶) = (+g‘(mulGrp‘𝑋)) |
15 | 14 | eqcomi 2747 | . . . . . 6 ⊢ (+g‘(mulGrp‘𝑋)) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶) |
16 | simpr 485 | . . . . . 6 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐶 ∈ 𝐵) → 𝐶 ∈ 𝐵) | |
17 | eluz2 12588 | . . . . . . . . 9 ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (2 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 2 ≤ 𝑁)) | |
18 | 1lt2 12144 | . . . . . . . . . 10 ⊢ 1 < 2 | |
19 | 1red 10976 | . . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ ℤ → 1 ∈ ℝ) | |
20 | 2re 12047 | . . . . . . . . . . . . . . 15 ⊢ 2 ∈ ℝ | |
21 | 20 | a1i 11 | . . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ ℤ → 2 ∈ ℝ) |
22 | zre 12323 | . . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ) | |
23 | ltletr 11067 | . . . . . . . . . . . . . 14 ⊢ ((1 ∈ ℝ ∧ 2 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((1 < 2 ∧ 2 ≤ 𝑁) → 1 < 𝑁)) | |
24 | 19, 21, 22, 23 | syl3anc 1370 | . . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℤ → ((1 < 2 ∧ 2 ≤ 𝑁) → 1 < 𝑁)) |
25 | 24 | expcomd 417 | . . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℤ → (2 ≤ 𝑁 → (1 < 2 → 1 < 𝑁))) |
26 | 25 | a1i 11 | . . . . . . . . . . 11 ⊢ (2 ∈ ℤ → (𝑁 ∈ ℤ → (2 ≤ 𝑁 → (1 < 2 → 1 < 𝑁)))) |
27 | 26 | 3imp 1110 | . . . . . . . . . 10 ⊢ ((2 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 2 ≤ 𝑁) → (1 < 2 → 1 < 𝑁)) |
28 | 18, 27 | mpi 20 | . . . . . . . . 9 ⊢ ((2 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 2 ≤ 𝑁) → 1 < 𝑁) |
29 | 17, 28 | sylbi 216 | . . . . . . . 8 ⊢ (𝑁 ∈ (ℤ≥‘2) → 1 < 𝑁) |
30 | eluz2nn 12624 | . . . . . . . . 9 ⊢ (𝑁 ∈ (ℤ≥‘2) → 𝑁 ∈ ℕ) | |
31 | 2, 3 | znhash 20766 | . . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (♯‘𝐵) = 𝑁) |
32 | 30, 31 | syl 17 | . . . . . . . 8 ⊢ (𝑁 ∈ (ℤ≥‘2) → (♯‘𝐵) = 𝑁) |
33 | 29, 32 | breqtrrd 5102 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘2) → 1 < (♯‘𝐵)) |
34 | 33 | adantr 481 | . . . . . 6 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐶 ∈ 𝐵) → 1 < (♯‘𝐵)) |
35 | 6, 15, 16, 34 | copisnmnd 45363 | . . . . 5 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐶 ∈ 𝐵) → (mulGrp‘𝑋) ∉ Mnd) |
36 | df-nel 3050 | . . . . 5 ⊢ ((mulGrp‘𝑋) ∉ Mnd ↔ ¬ (mulGrp‘𝑋) ∈ Mnd) | |
37 | 35, 36 | sylib 217 | . . . 4 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐶 ∈ 𝐵) → ¬ (mulGrp‘𝑋) ∈ Mnd) |
38 | 37 | intn3an2d 1479 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐶 ∈ 𝐵) → ¬ (𝑋 ∈ Grp ∧ (mulGrp‘𝑋) ∈ Mnd ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ 𝐵 ((𝑎(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))(𝑏(+g‘𝑋)𝑐)) = ((𝑎(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑏)(+g‘𝑋)(𝑎(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑐)) ∧ ((𝑎(+g‘𝑋)𝑏)(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑐) = ((𝑎(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑐)(+g‘𝑋)(𝑏(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑐))))) |
39 | eqid 2738 | . . . 4 ⊢ (+g‘𝑋) = (+g‘𝑋) | |
40 | 4 | eqcomi 2747 | . . . . 5 ⊢ (𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉) = 𝑋 |
41 | 40 | fveq2i 6777 | . . . 4 ⊢ (.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉)) = (.r‘𝑋) |
42 | 5, 1, 39, 41 | isring 19787 | . . 3 ⊢ (𝑋 ∈ Ring ↔ (𝑋 ∈ Grp ∧ (mulGrp‘𝑋) ∈ Mnd ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ 𝐵 ((𝑎(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))(𝑏(+g‘𝑋)𝑐)) = ((𝑎(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑏)(+g‘𝑋)(𝑎(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑐)) ∧ ((𝑎(+g‘𝑋)𝑏)(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑐) = ((𝑎(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑐)(+g‘𝑋)(𝑏(.r‘(𝑌 sSet 〈(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ 𝐶)〉))𝑐))))) |
43 | 38, 42 | sylnibr 329 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐶 ∈ 𝐵) → ¬ 𝑋 ∈ Ring) |
44 | df-nel 3050 | . 2 ⊢ (𝑋 ∉ Ring ↔ ¬ 𝑋 ∈ Ring) | |
45 | 43, 44 | sylibr 233 | 1 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐶 ∈ 𝐵) → 𝑋 ∉ Ring) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ∉ wnel 3049 ∀wral 3064 Vcvv 3432 〈cop 4567 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 ∈ cmpo 7277 ℝcr 10870 1c1 10872 < clt 11009 ≤ cle 11010 ℕcn 11973 2c2 12028 ℤcz 12319 ℤ≥cuz 12582 ♯chash 14044 sSet csts 16864 ndxcnx 16894 Basecbs 16912 +gcplusg 16962 .rcmulr 16963 0gc0g 17150 Mndcmnd 18385 Grpcgrp 18577 mulGrpcmgp 19720 Ringcrg 19783 ℤ/nℤczn 20704 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 ax-addf 10950 ax-mulf 10951 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-tpos 8042 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-ec 8500 df-qs 8504 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-sup 9201 df-inf 9202 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-4 12038 df-5 12039 df-6 12040 df-7 12041 df-8 12042 df-9 12043 df-n0 12234 df-xnn0 12306 df-z 12320 df-dec 12438 df-uz 12583 df-rp 12731 df-fz 13240 df-fzo 13383 df-fl 13512 df-mod 13590 df-seq 13722 df-hash 14045 df-dvds 15964 df-struct 16848 df-sets 16865 df-slot 16883 df-ndx 16895 df-base 16913 df-ress 16942 df-plusg 16975 df-mulr 16976 df-starv 16977 df-sca 16978 df-vsca 16979 df-ip 16980 df-tset 16981 df-ple 16982 df-ds 16984 df-unif 16985 df-0g 17152 df-imas 17219 df-qus 17220 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-mhm 18430 df-grp 18580 df-minusg 18581 df-sbg 18582 df-mulg 18701 df-subg 18752 df-nsg 18753 df-eqg 18754 df-ghm 18832 df-cmn 19388 df-abl 19389 df-mgp 19721 df-ur 19738 df-ring 19785 df-cring 19786 df-oppr 19862 df-dvdsr 19883 df-rnghom 19959 df-subrg 20022 df-lmod 20125 df-lss 20194 df-lsp 20234 df-sra 20434 df-rgmod 20435 df-lidl 20436 df-rsp 20437 df-2idl 20503 df-cnfld 20598 df-zring 20671 df-zrh 20705 df-zn 20708 |
This theorem is referenced by: (None) |
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