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Mirrors > Home > MPE Home > Th. List > Mathboxes > oddinmgm | Structured version Visualization version GIF version |
Description: The structure of all odd integers together with the addition of complex numbers is not a magma. Remark: the structure of the complementary subset of the set of integers, the even integers, is a magma, actually an abelian group, see 2zrngaabl 42469, and even a non-unital ring, see 2zrng 42460. (Contributed by AV, 3-Feb-2020.) |
Ref | Expression |
---|---|
oddinmgm.e | ⊢ 𝑂 = {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = ((2 · 𝑥) + 1)} |
oddinmgm.r | ⊢ 𝑀 = (ℂfld ↾s 𝑂) |
Ref | Expression |
---|---|
oddinmgm | ⊢ 𝑀 ∉ Mgm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oddinmgm.e | . . 3 ⊢ 𝑂 = {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = ((2 · 𝑥) + 1)} | |
2 | 1 | 1odd 42336 | . 2 ⊢ 1 ∈ 𝑂 |
3 | 1 | 2nodd 42337 | . . 3 ⊢ 2 ∉ 𝑂 |
4 | 1p1e2 11341 | . . . 4 ⊢ (1 + 1) = 2 | |
5 | neleq1 3051 | . . . 4 ⊢ ((1 + 1) = 2 → ((1 + 1) ∉ 𝑂 ↔ 2 ∉ 𝑂)) | |
6 | 4, 5 | ax-mp 5 | . . 3 ⊢ ((1 + 1) ∉ 𝑂 ↔ 2 ∉ 𝑂) |
7 | 3, 6 | mpbir 221 | . 2 ⊢ (1 + 1) ∉ 𝑂 |
8 | oddinmgm.r | . . . 4 ⊢ 𝑀 = (ℂfld ↾s 𝑂) | |
9 | 1, 8 | oddibas 42338 | . . 3 ⊢ 𝑂 = (Base‘𝑀) |
10 | 1, 8 | oddiadd 42339 | . . 3 ⊢ + = (+g‘𝑀) |
11 | 9, 10 | isnmgm 17454 | . 2 ⊢ ((1 ∈ 𝑂 ∧ 1 ∈ 𝑂 ∧ (1 + 1) ∉ 𝑂) → 𝑀 ∉ Mgm) |
12 | 2, 2, 7, 11 | mp3an 1572 | 1 ⊢ 𝑀 ∉ Mgm |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 196 = wceq 1631 ∈ wcel 2145 ∉ wnel 3046 ∃wrex 3062 {crab 3065 (class class class)co 6796 1c1 10143 + caddc 10145 · cmul 10147 2c2 11276 ℤcz 11584 ↾s cress 16065 Mgmcmgm 17448 ℂfldccnfld 19961 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1870 ax-4 1885 ax-5 1991 ax-6 2057 ax-7 2093 ax-8 2147 ax-9 2154 ax-10 2174 ax-11 2190 ax-12 2203 ax-13 2408 ax-ext 2751 ax-sep 4916 ax-nul 4924 ax-pow 4975 ax-pr 5035 ax-un 7100 ax-cnex 10198 ax-resscn 10199 ax-1cn 10200 ax-icn 10201 ax-addcl 10202 ax-addrcl 10203 ax-mulcl 10204 ax-mulrcl 10205 ax-mulcom 10206 ax-addass 10207 ax-mulass 10208 ax-distr 10209 ax-i2m1 10210 ax-1ne0 10211 ax-1rid 10212 ax-rnegex 10213 ax-rrecex 10214 ax-cnre 10215 ax-pre-lttri 10216 ax-pre-lttrn 10217 ax-pre-ltadd 10218 ax-pre-mulgt0 10219 ax-addf 10221 |
This theorem depends on definitions: df-bi 197 df-an 383 df-or 837 df-3or 1072 df-3an 1073 df-tru 1634 df-ex 1853 df-nf 1858 df-sb 2050 df-eu 2622 df-mo 2623 df-clab 2758 df-cleq 2764 df-clel 2767 df-nfc 2902 df-ne 2944 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3353 df-sbc 3588 df-csb 3683 df-dif 3726 df-un 3728 df-in 3730 df-ss 3737 df-pss 3739 df-nul 4064 df-if 4227 df-pw 4300 df-sn 4318 df-pr 4320 df-tp 4322 df-op 4324 df-uni 4576 df-int 4613 df-iun 4657 df-br 4788 df-opab 4848 df-mpt 4865 df-tr 4888 df-id 5158 df-eprel 5163 df-po 5171 df-so 5172 df-fr 5209 df-we 5211 df-xp 5256 df-rel 5257 df-cnv 5258 df-co 5259 df-dm 5260 df-rn 5261 df-res 5262 df-ima 5263 df-pred 5822 df-ord 5868 df-on 5869 df-lim 5870 df-suc 5871 df-iota 5993 df-fun 6032 df-fn 6033 df-f 6034 df-f1 6035 df-fo 6036 df-f1o 6037 df-fv 6038 df-riota 6757 df-ov 6799 df-oprab 6800 df-mpt2 6801 df-om 7217 df-1st 7319 df-2nd 7320 df-wrecs 7563 df-recs 7625 df-rdg 7663 df-1o 7717 df-oadd 7721 df-er 7900 df-en 8114 df-dom 8115 df-sdom 8116 df-fin 8117 df-pnf 10282 df-mnf 10283 df-xr 10284 df-ltxr 10285 df-le 10286 df-sub 10474 df-neg 10475 df-div 10891 df-nn 11227 df-2 11285 df-3 11286 df-4 11287 df-5 11288 df-6 11289 df-7 11290 df-8 11291 df-9 11292 df-n0 11500 df-z 11585 df-dec 11701 df-uz 11894 df-fz 12534 df-struct 16066 df-ndx 16067 df-slot 16068 df-base 16070 df-sets 16071 df-ress 16072 df-plusg 16162 df-mulr 16163 df-starv 16164 df-tset 16168 df-ple 16169 df-ds 16172 df-unif 16173 df-mgm 17450 df-cnfld 19962 |
This theorem is referenced by: (None) |
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