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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 10963 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 2758 | . . . . 5 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
3 | eqid 2758 | . . . . 5 ⊢ (invg‘𝐺) = (invg‘𝐺) | |
4 | grpsubid.m | . . . . 5 ⊢ − = (-g‘𝐺) | |
5 | 1, 2, 3, 4 | grpsubval 18230 | . . . 4 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌))) |
6 | 5 | 3adant1 1127 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌))) |
7 | 6 | eqeq1d 2760 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 − 𝑌) = 0 ↔ (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌)) = 0 )) |
8 | simp1 1133 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 𝐺 ∈ Grp) | |
9 | 1, 3 | grpinvcl 18232 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) ∈ 𝐵) |
10 | 9 | 3adant2 1128 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) ∈ 𝐵) |
11 | simp2 1134 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 𝑋 ∈ 𝐵) | |
12 | grpsubid.o | . . . 4 ⊢ 0 = (0g‘𝐺) | |
13 | 1, 2, 12, 3 | grpinvid2 18236 | . . 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 1368 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑋 ↔ (𝑋(+g‘𝐺)((invg‘𝐺)‘𝑌)) = 0 )) |
15 | 1, 3 | grpinvinv 18247 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑌) |
16 | 15 | 3adant2 1128 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑌) |
17 | 16 | eqeq1d 2760 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑋 ↔ 𝑌 = 𝑋)) |
18 | eqcom 2765 | . . 3 ⊢ (𝑌 = 𝑋 ↔ 𝑋 = 𝑌) | |
19 | 17, 18 | bitrdi 290 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑋 ↔ 𝑋 = 𝑌)) |
20 | 7, 14, 19 | 3bitr2d 310 | 1 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 − 𝑌) = 0 ↔ 𝑋 = 𝑌)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ w3a 1084 = wceq 1538 ∈ wcel 2111 ‘cfv 6340 (class class class)co 7156 Basecbs 16555 +gcplusg 16637 0gc0g 16785 Grpcgrp 18183 invgcminusg 18184 -gcsg 18185 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-sep 5173 ax-nul 5180 ax-pow 5238 ax-pr 5302 ax-un 7465 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-ral 3075 df-rex 3076 df-reu 3077 df-rmo 3078 df-rab 3079 df-v 3411 df-sbc 3699 df-csb 3808 df-dif 3863 df-un 3865 df-in 3867 df-ss 3877 df-nul 4228 df-if 4424 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4802 df-iun 4888 df-br 5037 df-opab 5099 df-mpt 5117 df-id 5434 df-xp 5534 df-rel 5535 df-cnv 5536 df-co 5537 df-dm 5538 df-rn 5539 df-res 5540 df-ima 5541 df-iota 6299 df-fun 6342 df-fn 6343 df-f 6344 df-fv 6348 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-1st 7699 df-2nd 7700 df-0g 16787 df-mgm 17932 df-sgrp 17981 df-mnd 17992 df-grp 18186 df-minusg 18187 df-sbg 18188 |
This theorem is referenced by: ghmeqker 18466 ghmf1 18468 odcong 18758 subgdisj1 18898 dprdf11 19227 kerf1ghm 19580 lmodsubeq0 19775 lvecvscan2 19966 ip2eq 20432 mdetuni0 21335 tgphaus 22831 nrmmetd 23290 ply1divmo 24849 dvdsq1p 24874 dvdsr1p 24875 ply1remlem 24876 ig1peu 24885 dchr2sum 25970 znfermltl 31096 linds2eq 31109 eqlkr 36710 hdmap11 39459 hdmapinvlem4 39532 isdomn4 39725 idomrootle 40557 lidldomn1 44971 |
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