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Mirrors > Home > MPE Home > Th. List > grpsubeq0 | Structured version Visualization version GIF version |
Description: If the difference between two group elements is zero, they are equal. (subeq0 10635 analog.) (Contributed by NM, 31-Mar-2014.) |
Ref | Expression |
---|---|
grpsubid.b | ⊢ 𝐵 = (Base‘𝐺) |
grpsubid.o | ⊢ 0 = (0g‘𝐺) |
grpsubid.m | ⊢ − = (-g‘𝐺) |
Ref | Expression |
---|---|
grpsubeq0 | ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 − 𝑌) = 0 ↔ 𝑋 = 𝑌)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | grpsubid.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐺) | |
2 | eqid 2825 | . . . . 5 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
3 | eqid 2825 | . . . . 5 ⊢ (invg‘𝐺) = (invg‘𝐺) | |
4 | grpsubid.m | . . . . 5 ⊢ − = (-g‘𝐺) | |
5 | 1, 2, 3, 4 | grpsubval 17826 | . . . 4 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌))) |
6 | 5 | 3adant1 1164 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌))) |
7 | 6 | eqeq1d 2827 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 − 𝑌) = 0 ↔ (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌)) = 0 )) |
8 | simp1 1170 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 𝐺 ∈ Grp) | |
9 | 1, 3 | grpinvcl 17828 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) ∈ 𝐵) |
10 | 9 | 3adant2 1165 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) ∈ 𝐵) |
11 | simp2 1171 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 𝑋 ∈ 𝐵) | |
12 | grpsubid.o | . . . 4 ⊢ 0 = (0g‘𝐺) | |
13 | 1, 2, 12, 3 | grpinvid2 17832 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ ((invg‘𝐺)‘𝑌) ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → (((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑋 ↔ (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌)) = 0 )) |
14 | 8, 10, 11, 13 | syl3anc 1494 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑋 ↔ (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌)) = 0 )) |
15 | 1, 3 | grpinvinv 17843 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑌) |
16 | 15 | 3adant2 1165 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑌) |
17 | 16 | eqeq1d 2827 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑋 ↔ 𝑌 = 𝑋)) |
18 | eqcom 2832 | . . 3 ⊢ (𝑌 = 𝑋 ↔ 𝑋 = 𝑌) | |
19 | 17, 18 | syl6bb 279 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑋 ↔ 𝑋 = 𝑌)) |
20 | 7, 14, 19 | 3bitr2d 299 | 1 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 − 𝑌) = 0 ↔ 𝑋 = 𝑌)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 198 ∧ w3a 1111 = wceq 1656 ∈ wcel 2164 ‘cfv 6127 (class class class)co 6910 Basecbs 16229 +gcplusg 16312 0gc0g 16460 Grpcgrp 17783 invgcminusg 17784 -gcsg 17785 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1894 ax-4 1908 ax-5 2009 ax-6 2075 ax-7 2112 ax-8 2166 ax-9 2173 ax-10 2192 ax-11 2207 ax-12 2220 ax-13 2389 ax-ext 2803 ax-rep 4996 ax-sep 5007 ax-nul 5015 ax-pow 5067 ax-pr 5129 ax-un 7214 |
This theorem depends on definitions: df-bi 199 df-an 387 df-or 879 df-3an 1113 df-tru 1660 df-ex 1879 df-nf 1883 df-sb 2068 df-mo 2605 df-eu 2640 df-clab 2812 df-cleq 2818 df-clel 2821 df-nfc 2958 df-ne 3000 df-ral 3122 df-rex 3123 df-reu 3124 df-rmo 3125 df-rab 3126 df-v 3416 df-sbc 3663 df-csb 3758 df-dif 3801 df-un 3803 df-in 3805 df-ss 3812 df-nul 4147 df-if 4309 df-pw 4382 df-sn 4400 df-pr 4402 df-op 4406 df-uni 4661 df-iun 4744 df-br 4876 df-opab 4938 df-mpt 4955 df-id 5252 df-xp 5352 df-rel 5353 df-cnv 5354 df-co 5355 df-dm 5356 df-rn 5357 df-res 5358 df-ima 5359 df-iota 6090 df-fun 6129 df-fn 6130 df-f 6131 df-f1 6132 df-fo 6133 df-f1o 6134 df-fv 6135 df-riota 6871 df-ov 6913 df-oprab 6914 df-mpt2 6915 df-1st 7433 df-2nd 7434 df-0g 16462 df-mgm 17602 df-sgrp 17644 df-mnd 17655 df-grp 17786 df-minusg 17787 df-sbg 17788 |
This theorem is referenced by: ghmeqker 18045 ghmf1 18047 odcong 18326 subgdisj1 18462 dprdf11 18783 kerf1hrm 19106 lmodsubeq0 19285 lvecvscan2 19478 ip2eq 20367 mdetuni0 20802 tgphaus 22297 nrmmetd 22756 ply1divmo 24301 dvdsq1p 24326 dvdsr1p 24327 ply1remlem 24328 ig1peu 24337 dchr2sum 25418 eqlkr 35169 hdmap11 37918 hdmapinvlem4 37991 idomrootle 38611 lidldomn1 42782 |
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