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Mirrors > Home > MPE Home > Th. List > grpinvf | Structured version Visualization version GIF version |
Description: The group inversion operation is a function on the base set. (Contributed by Mario Carneiro, 4-May-2015.) |
Ref | Expression |
---|---|
grpinvcl.b | ⊢ 𝐵 = (Base‘𝐺) |
grpinvcl.n | ⊢ 𝑁 = (invg‘𝐺) |
Ref | Expression |
---|---|
grpinvf | ⊢ (𝐺 ∈ Grp → 𝑁:𝐵⟶𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | grpinvcl.b | . . . 4 ⊢ 𝐵 = (Base‘𝐺) | |
2 | eqid 2738 | . . . 4 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
3 | eqid 2738 | . . . 4 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
4 | 1, 2, 3 | grpinveu 18614 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝐵) → ∃!𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺)) |
5 | riotacl 7250 | . . 3 ⊢ (∃!𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺) → (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺)) ∈ 𝐵) | |
6 | 4, 5 | syl 17 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝐵) → (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺)) ∈ 𝐵) |
7 | grpinvcl.n | . . 3 ⊢ 𝑁 = (invg‘𝐺) | |
8 | 1, 2, 3, 7 | grpinvfval 18618 | . 2 ⊢ 𝑁 = (𝑥 ∈ 𝐵 ↦ (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺))) |
9 | 6, 8 | fmptd 6988 | 1 ⊢ (𝐺 ∈ Grp → 𝑁:𝐵⟶𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ∃!wreu 3066 ⟶wf 6429 ‘cfv 6433 ℩crio 7231 (class class class)co 7275 Basecbs 16912 +gcplusg 16962 0gc0g 17150 Grpcgrp 18577 invgcminusg 18578 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-fv 6441 df-riota 7232 df-ov 7278 df-0g 17152 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-grp 18580 df-minusg 18581 |
This theorem is referenced by: grpinvcl 18627 isgrpinv 18632 grpinvcnv 18643 grpinvf1o 18645 grp1inv 18683 pwsinvg 18688 pwssub 18689 oppginv 18966 invoppggim 18967 symgtrinv 19080 invghm 19435 gsumzinv 19546 dprdfinv 19622 grpvlinv 21544 grpvrinv 21545 mdetralt 21757 istgp2 23242 subgtgp 23256 symgtgp 23257 tgpconncomp 23264 prdstgpd 23276 tsmssub 23300 tsmsxplem1 23304 tlmtgp 23347 nrginvrcn 23856 |
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