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Mirrors > Home > MPE Home > Th. List > frgpnabl | Structured version Visualization version GIF version |
Description: The free group on two or more generators is not abelian. (Contributed by Mario Carneiro, 21-Apr-2016.) |
Ref | Expression |
---|---|
frgpnabl.g | ⊢ 𝐺 = (freeGrp‘𝐼) |
Ref | Expression |
---|---|
frgpnabl | ⊢ (1o ≺ 𝐼 → ¬ 𝐺 ∈ Abel) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relsdom 8509 | . . . . 5 ⊢ Rel ≺ | |
2 | 1 | brrelex2i 5602 | . . . 4 ⊢ (1o ≺ 𝐼 → 𝐼 ∈ V) |
3 | 1sdom 8714 | . . . 4 ⊢ (𝐼 ∈ V → (1o ≺ 𝐼 ↔ ∃𝑎 ∈ 𝐼 ∃𝑏 ∈ 𝐼 ¬ 𝑎 = 𝑏)) | |
4 | 2, 3 | syl 17 | . . 3 ⊢ (1o ≺ 𝐼 → (1o ≺ 𝐼 ↔ ∃𝑎 ∈ 𝐼 ∃𝑏 ∈ 𝐼 ¬ 𝑎 = 𝑏)) |
5 | 4 | ibi 269 | . 2 ⊢ (1o ≺ 𝐼 → ∃𝑎 ∈ 𝐼 ∃𝑏 ∈ 𝐼 ¬ 𝑎 = 𝑏) |
6 | frgpnabl.g | . . . . . 6 ⊢ 𝐺 = (freeGrp‘𝐼) | |
7 | eqid 2820 | . . . . . 6 ⊢ ( I ‘Word (𝐼 × 2o)) = ( I ‘Word (𝐼 × 2o)) | |
8 | eqid 2820 | . . . . . 6 ⊢ ( ~FG ‘𝐼) = ( ~FG ‘𝐼) | |
9 | eqid 2820 | . . . . . 6 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
10 | eqid 2820 | . . . . . 6 ⊢ (𝑦 ∈ 𝐼, 𝑧 ∈ 2o ↦ 〈𝑦, (1o ∖ 𝑧)〉) = (𝑦 ∈ 𝐼, 𝑧 ∈ 2o ↦ 〈𝑦, (1o ∖ 𝑧)〉) | |
11 | eqid 2820 | . . . . . 6 ⊢ (𝑣 ∈ ( I ‘Word (𝐼 × 2o)) ↦ (𝑛 ∈ (0...(♯‘𝑣)), 𝑤 ∈ (𝐼 × 2o) ↦ (𝑣 splice 〈𝑛, 𝑛, 〈“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2o ↦ 〈𝑦, (1o ∖ 𝑧)〉)‘𝑤)”〉〉))) = (𝑣 ∈ ( I ‘Word (𝐼 × 2o)) ↦ (𝑛 ∈ (0...(♯‘𝑣)), 𝑤 ∈ (𝐼 × 2o) ↦ (𝑣 splice 〈𝑛, 𝑛, 〈“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2o ↦ 〈𝑦, (1o ∖ 𝑧)〉)‘𝑤)”〉〉))) | |
12 | eqid 2820 | . . . . . 6 ⊢ (( I ‘Word (𝐼 × 2o)) ∖ ∪ 𝑥 ∈ ( I ‘Word (𝐼 × 2o))ran ((𝑣 ∈ ( I ‘Word (𝐼 × 2o)) ↦ (𝑛 ∈ (0...(♯‘𝑣)), 𝑤 ∈ (𝐼 × 2o) ↦ (𝑣 splice 〈𝑛, 𝑛, 〈“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2o ↦ 〈𝑦, (1o ∖ 𝑧)〉)‘𝑤)”〉〉)))‘𝑥)) = (( I ‘Word (𝐼 × 2o)) ∖ ∪ 𝑥 ∈ ( I ‘Word (𝐼 × 2o))ran ((𝑣 ∈ ( I ‘Word (𝐼 × 2o)) ↦ (𝑛 ∈ (0...(♯‘𝑣)), 𝑤 ∈ (𝐼 × 2o) ↦ (𝑣 splice 〈𝑛, 𝑛, 〈“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2o ↦ 〈𝑦, (1o ∖ 𝑧)〉)‘𝑤)”〉〉)))‘𝑥)) | |
13 | eqid 2820 | . . . . . 6 ⊢ (varFGrp‘𝐼) = (varFGrp‘𝐼) | |
14 | 2 | ad2antrr 724 | . . . . . 6 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → 𝐼 ∈ V) |
15 | simplrl 775 | . . . . . 6 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → 𝑎 ∈ 𝐼) | |
16 | simplrr 776 | . . . . . 6 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → 𝑏 ∈ 𝐼) | |
17 | simpr 487 | . . . . . . 7 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → 𝐺 ∈ Abel) | |
18 | eqid 2820 | . . . . . . . . . 10 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
19 | 8, 13, 6, 18 | vrgpf 18889 | . . . . . . . . 9 ⊢ (𝐼 ∈ V → (varFGrp‘𝐼):𝐼⟶(Base‘𝐺)) |
20 | 14, 19 | syl 17 | . . . . . . . 8 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → (varFGrp‘𝐼):𝐼⟶(Base‘𝐺)) |
21 | 20, 15 | ffvelrnd 6845 | . . . . . . 7 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → ((varFGrp‘𝐼)‘𝑎) ∈ (Base‘𝐺)) |
22 | 20, 16 | ffvelrnd 6845 | . . . . . . 7 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → ((varFGrp‘𝐼)‘𝑏) ∈ (Base‘𝐺)) |
23 | 18, 9 | ablcom 18919 | . . . . . . 7 ⊢ ((𝐺 ∈ Abel ∧ ((varFGrp‘𝐼)‘𝑎) ∈ (Base‘𝐺) ∧ ((varFGrp‘𝐼)‘𝑏) ∈ (Base‘𝐺)) → (((varFGrp‘𝐼)‘𝑎)(+g‘𝐺)((varFGrp‘𝐼)‘𝑏)) = (((varFGrp‘𝐼)‘𝑏)(+g‘𝐺)((varFGrp‘𝐼)‘𝑎))) |
24 | 17, 21, 22, 23 | syl3anc 1366 | . . . . . 6 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → (((varFGrp‘𝐼)‘𝑎)(+g‘𝐺)((varFGrp‘𝐼)‘𝑏)) = (((varFGrp‘𝐼)‘𝑏)(+g‘𝐺)((varFGrp‘𝐼)‘𝑎))) |
25 | 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 24 | frgpnabllem2 18989 | . . . . 5 ⊢ (((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) ∧ 𝐺 ∈ Abel) → 𝑎 = 𝑏) |
26 | 25 | ex 415 | . . . 4 ⊢ ((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) → (𝐺 ∈ Abel → 𝑎 = 𝑏)) |
27 | 26 | con3d 155 | . . 3 ⊢ ((1o ≺ 𝐼 ∧ (𝑎 ∈ 𝐼 ∧ 𝑏 ∈ 𝐼)) → (¬ 𝑎 = 𝑏 → ¬ 𝐺 ∈ Abel)) |
28 | 27 | rexlimdvva 3293 | . 2 ⊢ (1o ≺ 𝐼 → (∃𝑎 ∈ 𝐼 ∃𝑏 ∈ 𝐼 ¬ 𝑎 = 𝑏 → ¬ 𝐺 ∈ Abel)) |
29 | 5, 28 | mpd 15 | 1 ⊢ (1o ≺ 𝐼 → ¬ 𝐺 ∈ Abel) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1536 ∈ wcel 2113 ∃wrex 3138 Vcvv 3491 ∖ cdif 3926 〈cop 4566 〈cotp 4568 ∪ ciun 4912 class class class wbr 5059 ↦ cmpt 5139 I cid 5452 × cxp 5546 ran crn 5549 ⟶wf 6344 ‘cfv 6348 (class class class)co 7149 ∈ cmpo 7151 1oc1o 8088 2oc2o 8089 ≺ csdm 8501 0cc0 10530 ...cfz 12889 ♯chash 13687 Word cword 13858 splice csplice 14106 〈“cs2 14198 Basecbs 16478 +gcplusg 16560 ~FG cefg 18827 freeGrpcfrgp 18828 varFGrpcvrgp 18829 Abelcabl 18902 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2792 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5323 ax-un 7454 ax-cnex 10586 ax-resscn 10587 ax-1cn 10588 ax-icn 10589 ax-addcl 10590 ax-addrcl 10591 ax-mulcl 10592 ax-mulrcl 10593 ax-mulcom 10594 ax-addass 10595 ax-mulass 10596 ax-distr 10597 ax-i2m1 10598 ax-1ne0 10599 ax-1rid 10600 ax-rnegex 10601 ax-rrecex 10602 ax-cnre 10603 ax-pre-lttri 10604 ax-pre-lttrn 10605 ax-pre-ltadd 10606 ax-pre-mulgt0 10607 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1083 df-3an 1084 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2799 df-cleq 2813 df-clel 2892 df-nfc 2962 df-ne 3016 df-nel 3123 df-ral 3142 df-rex 3143 df-reu 3144 df-rmo 3145 df-rab 3146 df-v 3493 df-sbc 3769 df-csb 3877 df-dif 3932 df-un 3934 df-in 3936 df-ss 3945 df-pss 3947 df-nul 4285 df-if 4461 df-pw 4534 df-sn 4561 df-pr 4563 df-tp 4565 df-op 4567 df-ot 4569 df-uni 4832 df-int 4870 df-iun 4914 df-iin 4915 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-riota 7107 df-ov 7152 df-oprab 7153 df-mpo 7154 df-om 7574 df-1st 7682 df-2nd 7683 df-wrecs 7940 df-recs 8001 df-rdg 8039 df-1o 8095 df-2o 8096 df-oadd 8099 df-er 8282 df-ec 8284 df-qs 8288 df-map 8401 df-en 8503 df-dom 8504 df-sdom 8505 df-fin 8506 df-sup 8899 df-inf 8900 df-card 9361 df-pnf 10670 df-mnf 10671 df-xr 10672 df-ltxr 10673 df-le 10674 df-sub 10865 df-neg 10866 df-nn 11632 df-2 11694 df-3 11695 df-4 11696 df-5 11697 df-6 11698 df-7 11699 df-8 11700 df-9 11701 df-n0 11892 df-xnn0 11962 df-z 11976 df-dec 12093 df-uz 12238 df-rp 12384 df-fz 12890 df-fzo 13031 df-hash 13688 df-word 13859 df-lsw 13910 df-concat 13918 df-s1 13945 df-substr 13998 df-pfx 14028 df-splice 14107 df-reverse 14116 df-s2 14205 df-struct 16480 df-ndx 16481 df-slot 16482 df-base 16484 df-plusg 16573 df-mulr 16574 df-sca 16576 df-vsca 16577 df-ip 16578 df-tset 16579 df-ple 16580 df-ds 16582 df-0g 16710 df-imas 16776 df-qus 16777 df-mgm 17847 df-sgrp 17896 df-mnd 17907 df-frmd 18009 df-grp 18101 df-efg 18830 df-frgp 18831 df-vrgp 18832 df-cmn 18903 df-abl 18904 |
This theorem is referenced by: frgpcyg 20715 |
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