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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 6556 | . . . 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 17369 | . . . 4 ⊢ (𝐴 ∈ 𝑋 → (0 · 𝐴) = 0 ) |
6 | 1, 5 | sylan9eqr 2666 | . . 3 ⊢ ((𝐴 ∈ 𝑋 ∧ (𝑂‘𝐴) = 0) → ((𝑂‘𝐴) · 𝐴) = 0 ) |
7 | 6 | adantrr 749 | . 2 ⊢ ((𝐴 ∈ 𝑋 ∧ ((𝑂‘𝐴) = 0 ∧ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } = ∅)) → ((𝑂‘𝐴) · 𝐴) = 0 ) |
8 | oveq1 6556 | . . . . . 6 ⊢ (𝑦 = (𝑂‘𝐴) → (𝑦 · 𝐴) = ((𝑂‘𝐴) · 𝐴)) | |
9 | 8 | eqeq1d 2612 | . . . . 5 ⊢ (𝑦 = (𝑂‘𝐴) → ((𝑦 · 𝐴) = 0 ↔ ((𝑂‘𝐴) · 𝐴) = 0 )) |
10 | 9 | elrab 3331 | . . . 4 ⊢ ((𝑂‘𝐴) ∈ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } ↔ ((𝑂‘𝐴) ∈ ℕ ∧ ((𝑂‘𝐴) · 𝐴) = 0 )) |
11 | 10 | simprbi 479 | . . 3 ⊢ ((𝑂‘𝐴) ∈ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } → ((𝑂‘𝐴) · 𝐴) = 0 ) |
12 | 11 | adantl 481 | . 2 ⊢ ((𝐴 ∈ 𝑋 ∧ (𝑂‘𝐴) ∈ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 }) → ((𝑂‘𝐴) · 𝐴) = 0 ) |
13 | odcl.2 | . . 3 ⊢ 𝑂 = (od‘𝐺) | |
14 | eqid 2610 | . . 3 ⊢ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } = {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } | |
15 | 2, 4, 3, 13, 14 | odlem1 17777 | . 2 ⊢ (𝐴 ∈ 𝑋 → (((𝑂‘𝐴) = 0 ∧ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } = ∅) ∨ (𝑂‘𝐴) ∈ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 })) |
16 | 7, 12, 15 | mpjaodan 823 | 1 ⊢ (𝐴 ∈ 𝑋 → ((𝑂‘𝐴) · 𝐴) = 0 ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ∈ wcel 1977 {crab 2900 ∅c0 3874 ‘cfv 5804 (class class class)co 6549 0cc0 9815 ℕcn 10897 Basecbs 15695 0gc0g 15923 .gcmg 17363 odcod 17767 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-sup 8231 df-inf 8232 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-nn 10898 df-n0 11170 df-z 11255 df-uz 11564 df-seq 12664 df-mulg 17364 df-od 17771 |
This theorem is referenced by: odmodnn0 17782 mndodconglem 17783 odmod 17788 odeq 17792 odeq1 17800 odf1 17802 chrid 19694 |
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