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Theorem grpinvf 19054
Description: The group inversion operation is a function on the base set. (Contributed by Mario Carneiro, 4-May-2015.)
Hypotheses
Ref Expression
grpinvcl.b 𝐵 = (Base‘𝐺)
grpinvcl.n 𝑁 = (invg𝐺)
Assertion
Ref Expression
grpinvf (𝐺 ∈ Grp → 𝑁:𝐵𝐵)

Proof of Theorem grpinvf
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 grpinvcl.b . . . 4 𝐵 = (Base‘𝐺)
2 eqid 2763 . . . 4 (+g𝐺) = (+g𝐺)
3 eqid 2763 . . . 4 (0g𝐺) = (0g𝐺)
41, 2, 3grpinveu 19042 . . 3 ((𝐺 ∈ Grp ∧ 𝑥𝐵) → ∃!𝑦𝐵 (𝑦(+g𝐺)𝑥) = (0g𝐺))
5 riotacl 7386 . . 3 (∃!𝑦𝐵 (𝑦(+g𝐺)𝑥) = (0g𝐺) → (𝑦𝐵 (𝑦(+g𝐺)𝑥) = (0g𝐺)) ∈ 𝐵)
64, 5syl 18 . 2 ((𝐺 ∈ Grp ∧ 𝑥𝐵) → (𝑦𝐵 (𝑦(+g𝐺)𝑥) = (0g𝐺)) ∈ 𝐵)
7 grpinvcl.n . . 3 𝑁 = (invg𝐺)
81, 2, 3, 7grpinvfval 19046 . 2 𝑁 = (𝑥𝐵 ↦ (𝑦𝐵 (𝑦(+g𝐺)𝑥) = (0g𝐺)))
96, 8fmptd 7111 1 (𝐺 ∈ Grp → 𝑁:𝐵𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1570  wcel 2143  ∃!wreu 3367  wf 6534  cfv 6538  crio 7368  (class class class)co 7412  Basecbs 17270  +gcplusg 17311  0gc0g 17493  Grpcgrp 19001  invgcminusg 19002
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3746  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-fv 6546  df-riota 7369  df-ov 7415  df-0g 17495  df-mgm 18699  df-sgrp 18778  df-mnd 18794  df-grp 19004  df-minusg 19005
This theorem is referenced by:  grpinvcl  19055  isgrpinv  19061  grpinvcnv  19074  grpinvf1o  19076  grp1inv  19115  pwsinvg  19120  pwssub  19121  oppginv  19430  invoppggim  19431  symgtrinv  19543  invghm  19904  gsumzinv  20016  dprdfinv  20092  grpvlinv  22536  grpvrinv  22537  mdetralt  22746  istgp2  24229  subgtgp  24243  symgtgp  24244  tgpconncomp  24251  prdstgpd  24263  tsmssub  24287  tsmsxplem1  24291  tlmtgp  24334  nrginvrcn  24830  gsummulsubdishift2  33367
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