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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 48115, and even a non-unital ring, see 2zrng 48106. (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 48036 | . 2 ⊢ 1 ∈ 𝑂 |
3 | 1 | 2nodd 48037 | . . 3 ⊢ 2 ∉ 𝑂 |
4 | 1p1e2 12395 | . . . 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 231 | . 2 ⊢ (1 + 1) ∉ 𝑂 |
8 | oddinmgm.r | . . . 4 ⊢ 𝑀 = (ℂfld ↾s 𝑂) | |
9 | 1, 8 | oddibas 48038 | . . 3 ⊢ 𝑂 = (Base‘𝑀) |
10 | 1, 8 | oddiadd 48039 | . . 3 ⊢ + = (+g‘𝑀) |
11 | 9, 10 | isnmgm 18676 | . 2 ⊢ ((1 ∈ 𝑂 ∧ 1 ∈ 𝑂 ∧ (1 + 1) ∉ 𝑂) → 𝑀 ∉ Mgm) |
12 | 2, 2, 7, 11 | mp3an 1461 | 1 ⊢ 𝑀 ∉ Mgm |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 206 = wceq 1538 ∈ wcel 2107 ∉ wnel 3045 ∃wrex 3069 {crab 3434 (class class class)co 7435 1c1 11160 + caddc 11162 · cmul 11164 2c2 12325 ℤcz 12617 ↾s cress 17280 Mgmcmgm 18670 ℂfldccnfld 21388 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2707 ax-sep 5303 ax-nul 5313 ax-pow 5372 ax-pr 5439 ax-un 7758 ax-cnex 11215 ax-resscn 11216 ax-1cn 11217 ax-icn 11218 ax-addcl 11219 ax-addrcl 11220 ax-mulcl 11221 ax-mulrcl 11222 ax-mulcom 11223 ax-addass 11224 ax-mulass 11225 ax-distr 11226 ax-i2m1 11227 ax-1ne0 11228 ax-1rid 11229 ax-rnegex 11230 ax-rrecex 11231 ax-cnre 11232 ax-pre-lttri 11233 ax-pre-lttrn 11234 ax-pre-ltadd 11235 ax-pre-mulgt0 11236 ax-addf 11238 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1541 df-fal 1551 df-ex 1778 df-nf 1782 df-sb 2064 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2728 df-clel 2815 df-nfc 2891 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3379 df-reu 3380 df-rab 3435 df-v 3481 df-sbc 3793 df-csb 3910 df-dif 3967 df-un 3969 df-in 3971 df-ss 3981 df-pss 3984 df-nul 4341 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-tp 4637 df-op 4639 df-uni 4914 df-iun 4999 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5584 df-eprel 5590 df-po 5598 df-so 5599 df-fr 5642 df-we 5644 df-xp 5696 df-rel 5697 df-cnv 5698 df-co 5699 df-dm 5700 df-rn 5701 df-res 5702 df-ima 5703 df-pred 6326 df-ord 6392 df-on 6393 df-lim 6394 df-suc 6395 df-iota 6519 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7392 df-ov 7438 df-oprab 7439 df-mpo 7440 df-om 7892 df-1st 8019 df-2nd 8020 df-frecs 8311 df-wrecs 8342 df-recs 8416 df-rdg 8455 df-1o 8511 df-er 8750 df-en 8991 df-dom 8992 df-sdom 8993 df-fin 8994 df-pnf 11301 df-mnf 11302 df-xr 11303 df-ltxr 11304 df-le 11305 df-sub 11498 df-neg 11499 df-div 11925 df-nn 12271 df-2 12333 df-3 12334 df-4 12335 df-5 12336 df-6 12337 df-7 12338 df-8 12339 df-9 12340 df-n0 12531 df-z 12618 df-dec 12738 df-uz 12883 df-fz 13551 df-struct 17187 df-sets 17204 df-slot 17222 df-ndx 17234 df-base 17252 df-ress 17281 df-plusg 17317 df-mulr 17318 df-starv 17319 df-tset 17323 df-ple 17324 df-ds 17326 df-unif 17327 df-mgm 18672 df-cnfld 21389 |
This theorem is referenced by: (None) |
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