Mathbox for Alexander van der Vekens |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > Mathboxes > 2zrngnmlid | Structured version Visualization version GIF version |
Description: R has no multiplicative (left) identity. (Contributed by AV, 12-Feb-2020.) |
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 |
---|---|
2zrngnmlid | ⊢ ∀𝑏 ∈ 𝐸 ∃𝑎 ∈ 𝐸 (𝑏 · 𝑎) ≠ 𝑎 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2zrng.e | . . . . 5 ⊢ 𝐸 = {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} | |
2 | 1 | 2even 44211 | . . . 4 ⊢ 2 ∈ 𝐸 |
3 | 2 | a1i 11 | . . 3 ⊢ (𝑏 ∈ 𝐸 → 2 ∈ 𝐸) |
4 | oveq2 7166 | . . . . 5 ⊢ (𝑎 = 2 → (𝑏 · 𝑎) = (𝑏 · 2)) | |
5 | id 22 | . . . . 5 ⊢ (𝑎 = 2 → 𝑎 = 2) | |
6 | 4, 5 | neeq12d 3079 | . . . 4 ⊢ (𝑎 = 2 → ((𝑏 · 𝑎) ≠ 𝑎 ↔ (𝑏 · 2) ≠ 2)) |
7 | 6 | adantl 484 | . . 3 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑎 = 2) → ((𝑏 · 𝑎) ≠ 𝑎 ↔ (𝑏 · 2) ≠ 2)) |
8 | elrabi 3677 | . . . . . 6 ⊢ (𝑏 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑏 ∈ ℤ) | |
9 | 8 | zcnd 12091 | . . . . 5 ⊢ (𝑏 ∈ {𝑧 ∈ ℤ ∣ ∃𝑥 ∈ ℤ 𝑧 = (2 · 𝑥)} → 𝑏 ∈ ℂ) |
10 | 9, 1 | eleq2s 2933 | . . . 4 ⊢ (𝑏 ∈ 𝐸 → 𝑏 ∈ ℂ) |
11 | 1 | 1neven 44210 | . . . . . . . 8 ⊢ 1 ∉ 𝐸 |
12 | elnelne2 3136 | . . . . . . . 8 ⊢ ((𝑏 ∈ 𝐸 ∧ 1 ∉ 𝐸) → 𝑏 ≠ 1) | |
13 | 11, 12 | mpan2 689 | . . . . . . 7 ⊢ (𝑏 ∈ 𝐸 → 𝑏 ≠ 1) |
14 | 13 | adantr 483 | . . . . . 6 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → 𝑏 ≠ 1) |
15 | simpr 487 | . . . . . . 7 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → 𝑏 ∈ ℂ) | |
16 | 2cnd 11718 | . . . . . . 7 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → 2 ∈ ℂ) | |
17 | 2ne0 11744 | . . . . . . . 8 ⊢ 2 ≠ 0 | |
18 | 17 | a1i 11 | . . . . . . 7 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → 2 ≠ 0) |
19 | 15, 16, 18 | divcan4d 11424 | . . . . . 6 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → ((𝑏 · 2) / 2) = 𝑏) |
20 | 2cnne0 11850 | . . . . . . 7 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0) | |
21 | divid 11329 | . . . . . . 7 ⊢ ((2 ∈ ℂ ∧ 2 ≠ 0) → (2 / 2) = 1) | |
22 | 20, 21 | mp1i 13 | . . . . . 6 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → (2 / 2) = 1) |
23 | 14, 19, 22 | 3netr4d 3095 | . . . . 5 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → ((𝑏 · 2) / 2) ≠ (2 / 2)) |
24 | 15, 16 | mulcld 10663 | . . . . . . . 8 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → (𝑏 · 2) ∈ ℂ) |
25 | 20 | a1i 11 | . . . . . . . 8 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → (2 ∈ ℂ ∧ 2 ≠ 0)) |
26 | div11 11328 | . . . . . . . 8 ⊢ (((𝑏 · 2) ∈ ℂ ∧ 2 ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → (((𝑏 · 2) / 2) = (2 / 2) ↔ (𝑏 · 2) = 2)) | |
27 | 24, 16, 25, 26 | syl3anc 1367 | . . . . . . 7 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → (((𝑏 · 2) / 2) = (2 / 2) ↔ (𝑏 · 2) = 2)) |
28 | 27 | biimprd 250 | . . . . . 6 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → ((𝑏 · 2) = 2 → ((𝑏 · 2) / 2) = (2 / 2))) |
29 | 28 | necon3d 3039 | . . . . 5 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → (((𝑏 · 2) / 2) ≠ (2 / 2) → (𝑏 · 2) ≠ 2)) |
30 | 23, 29 | mpd 15 | . . . 4 ⊢ ((𝑏 ∈ 𝐸 ∧ 𝑏 ∈ ℂ) → (𝑏 · 2) ≠ 2) |
31 | 10, 30 | mpdan 685 | . . 3 ⊢ (𝑏 ∈ 𝐸 → (𝑏 · 2) ≠ 2) |
32 | 3, 7, 31 | rspcedvd 3628 | . 2 ⊢ (𝑏 ∈ 𝐸 → ∃𝑎 ∈ 𝐸 (𝑏 · 𝑎) ≠ 𝑎) |
33 | 32 | rgen 3150 | 1 ⊢ ∀𝑏 ∈ 𝐸 ∃𝑎 ∈ 𝐸 (𝑏 · 𝑎) ≠ 𝑎 |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ≠ wne 3018 ∉ wnel 3125 ∀wral 3140 ∃wrex 3141 {crab 3144 ‘cfv 6357 (class class class)co 7158 ℂcc 10537 0cc0 10539 1c1 10540 · cmul 10544 / cdiv 11299 2c2 11695 ℤcz 11984 ↾s cress 16486 mulGrpcmgp 19241 ℂfldccnfld 20547 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-n0 11901 df-z 11985 |
This theorem is referenced by: 2zrngnring 44230 |
Copyright terms: Public domain | W3C validator |