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Mirrors > Home > MPE Home > Th. List > oppggrp | Structured version Visualization version GIF version |
Description: The opposite of a group is a group. (Contributed by Stefan O'Rear, 26-Aug-2015.) |
Ref | Expression |
---|---|
oppgbas.1 | ⊢ 𝑂 = (oppg‘𝑅) |
Ref | Expression |
---|---|
oppggrp | ⊢ (𝑅 ∈ Grp → 𝑂 ∈ Grp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oppgbas.1 | . . . 4 ⊢ 𝑂 = (oppg‘𝑅) | |
2 | eqid 2610 | . . . 4 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
3 | 1, 2 | oppgbas 17604 | . . 3 ⊢ (Base‘𝑅) = (Base‘𝑂) |
4 | 3 | a1i 11 | . 2 ⊢ (𝑅 ∈ Grp → (Base‘𝑅) = (Base‘𝑂)) |
5 | eqidd 2611 | . 2 ⊢ (𝑅 ∈ Grp → (+g‘𝑂) = (+g‘𝑂)) | |
6 | eqid 2610 | . . . 4 ⊢ (0g‘𝑅) = (0g‘𝑅) | |
7 | 1, 6 | oppgid 17609 | . . 3 ⊢ (0g‘𝑅) = (0g‘𝑂) |
8 | 7 | a1i 11 | . 2 ⊢ (𝑅 ∈ Grp → (0g‘𝑅) = (0g‘𝑂)) |
9 | grpmnd 17252 | . . 3 ⊢ (𝑅 ∈ Grp → 𝑅 ∈ Mnd) | |
10 | 1 | oppgmnd 17607 | . . 3 ⊢ (𝑅 ∈ Mnd → 𝑂 ∈ Mnd) |
11 | 9, 10 | syl 17 | . 2 ⊢ (𝑅 ∈ Grp → 𝑂 ∈ Mnd) |
12 | eqid 2610 | . . 3 ⊢ (invg‘𝑅) = (invg‘𝑅) | |
13 | 2, 12 | grpinvcl 17290 | . 2 ⊢ ((𝑅 ∈ Grp ∧ 𝑥 ∈ (Base‘𝑅)) → ((invg‘𝑅)‘𝑥) ∈ (Base‘𝑅)) |
14 | eqid 2610 | . . . 4 ⊢ (+g‘𝑅) = (+g‘𝑅) | |
15 | eqid 2610 | . . . 4 ⊢ (+g‘𝑂) = (+g‘𝑂) | |
16 | 14, 1, 15 | oppgplus 17602 | . . 3 ⊢ (((invg‘𝑅)‘𝑥)(+g‘𝑂)𝑥) = (𝑥(+g‘𝑅)((invg‘𝑅)‘𝑥)) |
17 | 2, 14, 6, 12 | grprinv 17292 | . . 3 ⊢ ((𝑅 ∈ Grp ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑥(+g‘𝑅)((invg‘𝑅)‘𝑥)) = (0g‘𝑅)) |
18 | 16, 17 | syl5eq 2656 | . 2 ⊢ ((𝑅 ∈ Grp ∧ 𝑥 ∈ (Base‘𝑅)) → (((invg‘𝑅)‘𝑥)(+g‘𝑂)𝑥) = (0g‘𝑅)) |
19 | 4, 5, 8, 11, 13, 18 | isgrpd2 17265 | 1 ⊢ (𝑅 ∈ Grp → 𝑂 ∈ Grp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ∈ wcel 1977 ‘cfv 5804 (class class class)co 6549 Basecbs 15695 +gcplusg 15768 0gc0g 15923 Mndcmnd 17117 Grpcgrp 17245 invgcminusg 17246 oppgcoppg 17598 |
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-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-tpos 7239 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 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-2 10956 df-ndx 15698 df-slot 15699 df-base 15700 df-sets 15701 df-plusg 15781 df-0g 15925 df-mgm 17065 df-sgrp 17107 df-mnd 17118 df-grp 17248 df-minusg 17249 df-oppg 17599 |
This theorem is referenced by: oppggrpb 17611 oppginv 17612 invoppggim 17613 oppgtgp 21712 |
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