Theorem grpinvfng 13598

Description: Functionality of the group inverse function. (Contributed by Stefan O'Rear, 21-Mar-2015.)

Hypotheses

Ref	Expression
grpinvfn.b	⊢ 𝐵 = (Base‘𝐺)
grpinvfn.n	⊢ 𝑁 = (invg‘𝐺)

Assertion

Ref	Expression
grpinvfng	⊢ (𝐺 ∈ 𝑉 → 𝑁 Fn 𝐵)

Proof of Theorem grpinvfng

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		grpinvfn.b	. . . . . 6 ⊢ 𝐵 = (Base‘𝐺)
2		basfn 13112	. . . . . . 7 ⊢ Base Fn V
3		elex 2811	. . . . . . 7 ⊢ (𝐺 ∈ 𝑉 → 𝐺 ∈ V)
4		funfvex 5649	. . . . . . . 8 ⊢ ((Fun Base ∧ 𝐺 ∈ dom Base) → (Base‘𝐺) ∈ V)
5	4	funfni 5426	. . . . . . 7 ⊢ ((Base Fn V ∧ 𝐺 ∈ V) → (Base‘𝐺) ∈ V)
6	2, 3, 5	sylancr 414	. . . . . 6 ⊢ (𝐺 ∈ 𝑉 → (Base‘𝐺) ∈ V)
7	1, 6	eqeltrid 2316	. . . . 5 ⊢ (𝐺 ∈ 𝑉 → 𝐵 ∈ V)
8		riotaexg 5967	. . . . 5 ⊢ (𝐵 ∈ V → (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺)) ∈ V)
9	7, 8	syl 14	. . . 4 ⊢ (𝐺 ∈ 𝑉 → (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺)) ∈ V)
10	9	ralrimivw 2604	. . 3 ⊢ (𝐺 ∈ 𝑉 → ∀𝑥 ∈ 𝐵 (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺)) ∈ V)
11		eqid 2229	. . . 4 ⊢ (𝑥 ∈ 𝐵 ↦ (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺))) = (𝑥 ∈ 𝐵 ↦ (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺)))
12	11	fnmpt 5453	. . 3 ⊢ (∀𝑥 ∈ 𝐵 (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺)) ∈ V → (𝑥 ∈ 𝐵 ↦ (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺))) Fn 𝐵)
13	10, 12	syl 14	. 2 ⊢ (𝐺 ∈ 𝑉 → (𝑥 ∈ 𝐵 ↦ (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺))) Fn 𝐵)
14		eqid 2229	. . . 4 ⊢ (+g‘𝐺) = (+g‘𝐺)
15		eqid 2229	. . . 4 ⊢ (0g‘𝐺) = (0g‘𝐺)
16		grpinvfn.n	. . . 4 ⊢ 𝑁 = (invg‘𝐺)
17	1, 14, 15, 16	grpinvfvalg 13596	. . 3 ⊢ (𝐺 ∈ 𝑉 → 𝑁 = (𝑥 ∈ 𝐵 ↦ (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺))))
18	17	fneq1d 5414	. 2 ⊢ (𝐺 ∈ 𝑉 → (𝑁 Fn 𝐵 ↔ (𝑥 ∈ 𝐵 ↦ (℩𝑦 ∈ 𝐵 (𝑦(+g‘𝐺)𝑥) = (0g‘𝐺))) Fn 𝐵))
19	13, 18	mpbird 167	1 ⊢ (𝐺 ∈ 𝑉 → 𝑁 Fn 𝐵)

Syntax hints:   → wi 4   = wceq 1395   ∈ wcel 2200  ∀wral 2508  Vcvv 2799   ↦ cmpt 4145   Fn wfn 5316  ‘cfv 5321  ℩crio 5962  (class class class)co 6010  Basecbs 13053  +_gcplusg 13131  0_gc0g 13310  inv_gcminusg 13555

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-pow 4259  ax-pr 4294  ax-un 4525  ax-cnex 8106  ax-resscn 8107  ax-1re 8109  ax-addrcl 8112

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4385  df-xp 4726  df-rel 4727  df-cnv 4728  df-co 4729  df-dm 4730  df-rn 4731  df-res 4732  df-ima 4733  df-iota 5281  df-fun 5323  df-fn 5324  df-f 5325  df-f1 5326  df-fo 5327  df-f1o 5328  df-fv 5329  df-riota 5963  df-ov 6013  df-inn 9127  df-ndx 13056  df-slot 13057  df-base 13059  df-minusg 13558

This theorem is referenced by:  isgrpinv  13608  mulgval  13680  mulgfng  13682  invrfvald  14107