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Mirrors > Home > MPE Home > Th. List > odlem1 | Structured version Visualization version GIF version |
Description: The group element order is either zero or a nonzero multiplier that annihilates the element. (Contributed by Mario Carneiro, 14-Jan-2015.) (Revised by Stefan O'Rear, 5-Sep-2015.) (Revised by AV, 5-Oct-2020.) |
Ref | Expression |
---|---|
odval.1 | ⊢ 𝑋 = (Base‘𝐺) |
odval.2 | ⊢ · = (.g‘𝐺) |
odval.3 | ⊢ 0 = (0g‘𝐺) |
odval.4 | ⊢ 𝑂 = (od‘𝐺) |
odval.i | ⊢ 𝐼 = {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } |
Ref | Expression |
---|---|
odlem1 | ⊢ (𝐴 ∈ 𝑋 → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | odval.1 | . . 3 ⊢ 𝑋 = (Base‘𝐺) | |
2 | odval.2 | . . 3 ⊢ · = (.g‘𝐺) | |
3 | odval.3 | . . 3 ⊢ 0 = (0g‘𝐺) | |
4 | odval.4 | . . 3 ⊢ 𝑂 = (od‘𝐺) | |
5 | odval.i | . . 3 ⊢ 𝐼 = {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } | |
6 | 1, 2, 3, 4, 5 | odval 18782 | . 2 ⊢ (𝐴 ∈ 𝑋 → (𝑂‘𝐴) = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < ))) |
7 | eqeq2 2750 | . . . 4 ⊢ (0 = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )) → ((𝑂‘𝐴) = 0 ↔ (𝑂‘𝐴) = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )))) | |
8 | 7 | imbi1d 345 | . . 3 ⊢ (0 = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )) → (((𝑂‘𝐴) = 0 → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼)) ↔ ((𝑂‘𝐴) = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )) → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼)))) |
9 | eqeq2 2750 | . . . 4 ⊢ (inf(𝐼, ℝ, < ) = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )) → ((𝑂‘𝐴) = inf(𝐼, ℝ, < ) ↔ (𝑂‘𝐴) = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )))) | |
10 | 9 | imbi1d 345 | . . 3 ⊢ (inf(𝐼, ℝ, < ) = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )) → (((𝑂‘𝐴) = inf(𝐼, ℝ, < ) → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼)) ↔ ((𝑂‘𝐴) = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )) → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼)))) |
11 | orc 866 | . . . . 5 ⊢ (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼)) | |
12 | 11 | expcom 417 | . . . 4 ⊢ (𝐼 = ∅ → ((𝑂‘𝐴) = 0 → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼))) |
13 | 12 | adantl 485 | . . 3 ⊢ ((𝐴 ∈ 𝑋 ∧ 𝐼 = ∅) → ((𝑂‘𝐴) = 0 → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼))) |
14 | ssrab2 3969 | . . . . . . 7 ⊢ {𝑦 ∈ ℕ ∣ (𝑦 · 𝐴) = 0 } ⊆ ℕ | |
15 | nnuz 12365 | . . . . . . . 8 ⊢ ℕ = (ℤ≥‘1) | |
16 | 15 | eqcomi 2747 | . . . . . . 7 ⊢ (ℤ≥‘1) = ℕ |
17 | 14, 5, 16 | 3sstr4i 3920 | . . . . . 6 ⊢ 𝐼 ⊆ (ℤ≥‘1) |
18 | neqne 2942 | . . . . . . 7 ⊢ (¬ 𝐼 = ∅ → 𝐼 ≠ ∅) | |
19 | 18 | adantl 485 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑋 ∧ ¬ 𝐼 = ∅) → 𝐼 ≠ ∅) |
20 | infssuzcl 12416 | . . . . . 6 ⊢ ((𝐼 ⊆ (ℤ≥‘1) ∧ 𝐼 ≠ ∅) → inf(𝐼, ℝ, < ) ∈ 𝐼) | |
21 | 17, 19, 20 | sylancr 590 | . . . . 5 ⊢ ((𝐴 ∈ 𝑋 ∧ ¬ 𝐼 = ∅) → inf(𝐼, ℝ, < ) ∈ 𝐼) |
22 | eleq1a 2828 | . . . . 5 ⊢ (inf(𝐼, ℝ, < ) ∈ 𝐼 → ((𝑂‘𝐴) = inf(𝐼, ℝ, < ) → (𝑂‘𝐴) ∈ 𝐼)) | |
23 | 21, 22 | syl 17 | . . . 4 ⊢ ((𝐴 ∈ 𝑋 ∧ ¬ 𝐼 = ∅) → ((𝑂‘𝐴) = inf(𝐼, ℝ, < ) → (𝑂‘𝐴) ∈ 𝐼)) |
24 | olc 867 | . . . 4 ⊢ ((𝑂‘𝐴) ∈ 𝐼 → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼)) | |
25 | 23, 24 | syl6 35 | . . 3 ⊢ ((𝐴 ∈ 𝑋 ∧ ¬ 𝐼 = ∅) → ((𝑂‘𝐴) = inf(𝐼, ℝ, < ) → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼))) |
26 | 8, 10, 13, 25 | ifbothda 4452 | . 2 ⊢ (𝐴 ∈ 𝑋 → ((𝑂‘𝐴) = if(𝐼 = ∅, 0, inf(𝐼, ℝ, < )) → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼))) |
27 | 6, 26 | mpd 15 | 1 ⊢ (𝐴 ∈ 𝑋 → (((𝑂‘𝐴) = 0 ∧ 𝐼 = ∅) ∨ (𝑂‘𝐴) ∈ 𝐼)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 ∨ wo 846 = wceq 1542 ∈ wcel 2114 ≠ wne 2934 {crab 3057 ⊆ wss 3843 ∅c0 4211 ifcif 4414 ‘cfv 6339 (class class class)co 7172 infcinf 8980 ℝcr 10616 0cc0 10617 1c1 10618 < clt 10755 ℕcn 11718 ℤ≥cuz 12326 Basecbs 16588 0gc0g 16818 .gcmg 18344 odcod 18772 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7481 ax-cnex 10673 ax-resscn 10674 ax-1cn 10675 ax-icn 10676 ax-addcl 10677 ax-addrcl 10678 ax-mulcl 10679 ax-mulrcl 10680 ax-mulcom 10681 ax-addass 10682 ax-mulass 10683 ax-distr 10684 ax-i2m1 10685 ax-1ne0 10686 ax-1rid 10687 ax-rnegex 10688 ax-rrecex 10689 ax-cnre 10690 ax-pre-lttri 10691 ax-pre-lttrn 10692 ax-pre-ltadd 10693 ax-pre-mulgt0 10694 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rmo 3061 df-rab 3062 df-v 3400 df-sbc 3681 df-csb 3791 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-pss 3862 df-nul 4212 df-if 4415 df-pw 4490 df-sn 4517 df-pr 4519 df-tp 4521 df-op 4523 df-uni 4797 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5429 df-eprel 5434 df-po 5442 df-so 5443 df-fr 5483 df-we 5485 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-pred 6129 df-ord 6175 df-on 6176 df-lim 6177 df-suc 6178 df-iota 6297 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-riota 7129 df-ov 7175 df-oprab 7176 df-mpo 7177 df-om 7602 df-wrecs 7978 df-recs 8039 df-rdg 8077 df-er 8322 df-en 8558 df-dom 8559 df-sdom 8560 df-sup 8981 df-inf 8982 df-pnf 10757 df-mnf 10758 df-xr 10759 df-ltxr 10760 df-le 10761 df-sub 10952 df-neg 10953 df-nn 11719 df-n0 11979 df-z 12065 df-uz 12327 df-od 18776 |
This theorem is referenced by: odcl 18784 odid 18786 |
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