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Mirrors > Home > MPE Home > Th. List > odid | Structured version Visualization version GIF version |
Description: Any element to the power of its order is the identity. (Contributed by Mario Carneiro, 14-Jan-2015.) (Revised by Stefan O'Rear, 5-Sep-2015.) |
Ref | Expression |
---|---|
odcl.1 | ⊢ 𝑋 = (Base‘𝐺) |
odcl.2 | ⊢ 𝑂 = (od‘𝐺) |
odid.3 | ⊢ · = (.g‘𝐺) |
odid.4 | ⊢ 0 = (0g‘𝐺) |
Ref | Expression |
---|---|
odid | ⊢ (𝐴 ∈ 𝑋 → ((𝑂‘𝐴) · 𝐴) = 0 ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq1 7157 | . . . 4 ⊢ ((𝑂‘𝐴) = 0 → ((𝑂‘𝐴) · 𝐴) = (0 · 𝐴)) | |
2 | odcl.1 | . . . . 5 ⊢ 𝑋 = (Base‘𝐺) | |
3 | odid.4 | . . . . 5 ⊢ 0 = (0g‘𝐺) | |
4 | odid.3 | . . . . 5 ⊢ · = (.g‘𝐺) | |
5 | 2, 3, 4 | mulg0 18225 | . . . 4 ⊢ (𝐴 ∈ 𝑋 → (0 · 𝐴) = 0 ) |
6 | 1, 5 | sylan9eqr 2878 | . . 3 ⊢ ((𝐴 ∈ 𝑋 ∧ (𝑂‘𝐴) = 0) → ((𝑂‘𝐴) · 𝐴) = 0 ) |
7 | 6 | adantrr 715 | . 2 ⊢ ((𝐴 ∈ 𝑋 ∧ ((𝑂‘𝐴) = 0 ∧ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } = ∅)) → ((𝑂‘𝐴) · 𝐴) = 0 ) |
8 | oveq1 7157 | . . . . . 6 ⊢ (𝑦 = (𝑂‘𝐴) → (𝑦 · 𝐴) = ((𝑂‘𝐴) · 𝐴)) | |
9 | 8 | eqeq1d 2823 | . . . . 5 ⊢ (𝑦 = (𝑂‘𝐴) → ((𝑦 · 𝐴) = 0 ↔ ((𝑂‘𝐴) · 𝐴) = 0 )) |
10 | 9 | elrab 3679 | . . . 4 ⊢ ((𝑂‘𝐴) ∈ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } ↔ ((𝑂‘𝐴) ∈ ℕ ∧ ((𝑂‘𝐴) · 𝐴) = 0 )) |
11 | 10 | simprbi 499 | . . 3 ⊢ ((𝑂‘𝐴) ∈ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } → ((𝑂‘𝐴) · 𝐴) = 0 ) |
12 | 11 | adantl 484 | . 2 ⊢ ((𝐴 ∈ 𝑋 ∧ (𝑂‘𝐴) ∈ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 }) → ((𝑂‘𝐴) · 𝐴) = 0 ) |
13 | odcl.2 | . . 3 ⊢ 𝑂 = (od‘𝐺) | |
14 | eqid 2821 | . . 3 ⊢ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } = {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } | |
15 | 2, 4, 3, 13, 14 | odlem1 18657 | . 2 ⊢ (𝐴 ∈ 𝑋 → (((𝑂‘𝐴) = 0 ∧ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } = ∅) ∨ (𝑂‘𝐴) ∈ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 })) |
16 | 7, 12, 15 | mpjaodan 955 | 1 ⊢ (𝐴 ∈ 𝑋 → ((𝑂‘𝐴) · 𝐴) = 0 ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 ∈ wcel 2110 {crab 3142 ∅c0 4290 ‘cfv 6349 (class class class)co 7150 0cc0 10531 ℕcn 11632 Basecbs 16477 0gc0g 16707 .gcmg 18218 odcod 18646 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7455 ax-cnex 10587 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-pss 3953 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4561 df-pr 4563 df-tp 4565 df-op 4567 df-uni 4832 df-iun 4913 df-br 5059 df-opab 5121 df-mpt 5139 df-tr 5165 df-id 5454 df-eprel 5459 df-po 5468 df-so 5469 df-fr 5508 df-we 5510 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-pred 6142 df-ord 6188 df-on 6189 df-lim 6190 df-suc 6191 df-iota 6308 df-fun 6351 df-fn 6352 df-f 6353 df-f1 6354 df-fo 6355 df-f1o 6356 df-fv 6357 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-om 7575 df-1st 7683 df-2nd 7684 df-wrecs 7941 df-recs 8002 df-rdg 8040 df-er 8283 df-en 8504 df-dom 8505 df-sdom 8506 df-sup 8900 df-inf 8901 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-nn 11633 df-n0 11892 df-z 11976 df-uz 12238 df-seq 13364 df-mulg 18219 df-od 18650 |
This theorem is referenced by: odmodnn0 18662 mndodconglem 18663 odmod 18668 odeq 18672 odeq1 18681 odf1 18683 chrid 20668 |
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