Theorem grpvrinv 21001

Description: Tuple-wise right inverse in groups. (Contributed by Mario Carneiro, 22-Sep-2015.)

Hypotheses

Ref	Expression
grpvlinv.b	⊢ 𝐵 = (Base‘𝐺)
grpvlinv.p	⊢ + = (+g‘𝐺)
grpvlinv.n	⊢ 𝑁 = (invg‘𝐺)
grpvlinv.z	⊢ 0 = (0g‘𝐺)

Assertion

Ref	Expression
grpvrinv	⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → (𝑋 ∘f + (𝑁 ∘ 𝑋)) = (𝐼 × { 0 }))

Proof of Theorem grpvrinv

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpll 765	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) ∧ 𝑥 ∈ 𝐼) → 𝐺 ∈ Grp)
2		elmapi 8422	. . . . . 6 ⊢ (𝑋 ∈ (𝐵 ↑m 𝐼) → 𝑋:𝐼⟶𝐵)
3	2	adantl 484	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → 𝑋:𝐼⟶𝐵)
4	3	ffvelrnda 6845	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) ∧ 𝑥 ∈ 𝐼) → (𝑋‘𝑥) ∈ 𝐵)
5		grpvlinv.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐺)
6		grpvlinv.p	. . . . 5 ⊢ + = (+g‘𝐺)
7		grpvlinv.z	. . . . 5 ⊢ 0 = (0g‘𝐺)
8		grpvlinv.n	. . . . 5 ⊢ 𝑁 = (invg‘𝐺)
9	5, 6, 7, 8	grprinv 18147	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ (𝑋‘𝑥) ∈ 𝐵) → ((𝑋‘𝑥) + (𝑁‘(𝑋‘𝑥))) = 0 )
10	1, 4, 9	syl2anc 586	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) ∧ 𝑥 ∈ 𝐼) → ((𝑋‘𝑥) + (𝑁‘(𝑋‘𝑥))) = 0 )
11	10	mpteq2dva 5153	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → (𝑥 ∈ 𝐼 ↦ ((𝑋‘𝑥) + (𝑁‘(𝑋‘𝑥)))) = (𝑥 ∈ 𝐼 ↦ 0 ))
12		elmapex 8421	. . . . 5 ⊢ (𝑋 ∈ (𝐵 ↑m 𝐼) → (𝐵 ∈ V ∧ 𝐼 ∈ V))
13	12	simprd 498	. . . 4 ⊢ (𝑋 ∈ (𝐵 ↑m 𝐼) → 𝐼 ∈ V)
14	13	adantl 484	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → 𝐼 ∈ V)
15		fvexd 6679	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) ∧ 𝑥 ∈ 𝐼) → (𝑁‘(𝑋‘𝑥)) ∈ V)
16	3	feqmptd 6727	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → 𝑋 = (𝑥 ∈ 𝐼 ↦ (𝑋‘𝑥)))
17	5, 8	grpinvf 18144	. . . 4 ⊢ (𝐺 ∈ Grp → 𝑁:𝐵⟶𝐵)
18		fcompt 6889	. . . 4 ⊢ ((𝑁:𝐵⟶𝐵 ∧ 𝑋:𝐼⟶𝐵) → (𝑁 ∘ 𝑋) = (𝑥 ∈ 𝐼 ↦ (𝑁‘(𝑋‘𝑥))))
19	17, 2, 18	syl2an 597	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → (𝑁 ∘ 𝑋) = (𝑥 ∈ 𝐼 ↦ (𝑁‘(𝑋‘𝑥))))
20	14, 4, 15, 16, 19	offval2 7420	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → (𝑋 ∘f + (𝑁 ∘ 𝑋)) = (𝑥 ∈ 𝐼 ↦ ((𝑋‘𝑥) + (𝑁‘(𝑋‘𝑥)))))
21		fconstmpt 5608	. . 3 ⊢ (𝐼 × { 0 }) = (𝑥 ∈ 𝐼 ↦ 0 )
22	21	a1i 11	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → (𝐼 × { 0 }) = (𝑥 ∈ 𝐼 ↦ 0 ))
23	11, 20, 22	3eqtr4d 2866	1 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ (𝐵 ↑m 𝐼)) → (𝑋 ∘f + (𝑁 ∘ 𝑋)) = (𝐼 × { 0 }))

Syntax hints:   → wi 4   ∧ wa 398   = wceq 1533   ∈ wcel 2110  Vcvv 3494  {csn 4560   ↦ cmpt 5138   × cxp 5547   ∘ ccom 5553  ⟶wf 6345  ‘cfv 6349  (class class class)co 7150   ∘_f cof 7401   ↑_m cmap 8400  Basecbs 16477  +_gcplusg 16559  0_gc0g 16707  Grpcgrp 18097  inv_gcminusg 18098

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-rep 5182  ax-sep 5195  ax-nul 5202  ax-pow 5258  ax-pr 5321  ax-un 7455

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rmo 3146  df-rab 3147  df-v 3496  df-sbc 3772  df-csb 3883  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4561  df-pr 4563  df-op 4567  df-uni 4832  df-iun 4913  df-br 5059  df-opab 5121  df-mpt 5139  df-id 5454  df-xp 5555  df-rel 5556  df-cnv 5557  df-co 5558  df-dm 5559  df-rn 5560  df-res 5561  df-ima 5562  df-iota 6308  df-fun 6351  df-fn 6352  df-f 6353  df-f1 6354  df-fo 6355  df-f1o 6356  df-fv 6357  df-riota 7108  df-ov 7153  df-oprab 7154  df-mpo 7155  df-of 7403  df-1st 7683  df-2nd 7684  df-map 8402  df-0g 16709  df-mgm 17846  df-sgrp 17895  df-mnd 17906  df-grp 18100  df-minusg 18101

This theorem is referenced by: (None)