Theorem grpinvadd 17493

Description: The inverse of the group operation reverses the arguments. Lemma 2.2.1(d) of [Herstein] p. 55. (Contributed by NM, 27-Oct-2006.)

Hypotheses

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

Assertion

Ref	Expression
grpinvadd	⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑁‘(𝑋 + 𝑌)) = ((𝑁‘𝑌) + (𝑁‘𝑋)))

Proof of Theorem grpinvadd

Step	Hyp	Ref	Expression
1		simp1 1061	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 𝐺 ∈ Grp)
2		simp2 1062	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 𝑋 ∈ 𝐵)
3		simp3 1063	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 𝑌 ∈ 𝐵)
4		grpinvadd.b	. . . . . . 7 ⊢ 𝐵 = (Base‘𝐺)
5		grpinvadd.n	. . . . . . 7 ⊢ 𝑁 = (invg‘𝐺)
6	4, 5	grpinvcl 17467	. . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → (𝑁‘𝑌) ∈ 𝐵)
7	6	3adant2 1080	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑁‘𝑌) ∈ 𝐵)
8	4, 5	grpinvcl 17467	. . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵) → (𝑁‘𝑋) ∈ 𝐵)
9	8	3adant3 1081	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑁‘𝑋) ∈ 𝐵)
10		grpinvadd.p	. . . . . 6 ⊢ + = (+g‘𝐺)
11	4, 10	grpcl 17430	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ (𝑁‘𝑌) ∈ 𝐵 ∧ (𝑁‘𝑋) ∈ 𝐵) → ((𝑁‘𝑌) + (𝑁‘𝑋)) ∈ 𝐵)
12	1, 7, 9, 11	syl3anc 1326	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑁‘𝑌) + (𝑁‘𝑋)) ∈ 𝐵)
13	4, 10	grpass 17431	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ ((𝑁‘𝑌) + (𝑁‘𝑋)) ∈ 𝐵)) → ((𝑋 + 𝑌) + ((𝑁‘𝑌) + (𝑁‘𝑋))) = (𝑋 + (𝑌 + ((𝑁‘𝑌) + (𝑁‘𝑋)))))
14	1, 2, 3, 12, 13	syl13anc 1328	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 + 𝑌) + ((𝑁‘𝑌) + (𝑁‘𝑋))) = (𝑋 + (𝑌 + ((𝑁‘𝑌) + (𝑁‘𝑋)))))
15		eqid 2622	. . . . . . . 8 ⊢ (0g‘𝐺) = (0g‘𝐺)
16	4, 10, 15, 5	grprinv 17469	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → (𝑌 + (𝑁‘𝑌)) = (0g‘𝐺))
17	16	3adant2 1080	. . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑌 + (𝑁‘𝑌)) = (0g‘𝐺))
18	17	oveq1d 6665	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑌 + (𝑁‘𝑌)) + (𝑁‘𝑋)) = ((0g‘𝐺) + (𝑁‘𝑋)))
19	4, 10	grpass 17431	. . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ (𝑌 ∈ 𝐵 ∧ (𝑁‘𝑌) ∈ 𝐵 ∧ (𝑁‘𝑋) ∈ 𝐵)) → ((𝑌 + (𝑁‘𝑌)) + (𝑁‘𝑋)) = (𝑌 + ((𝑁‘𝑌) + (𝑁‘𝑋))))
20	1, 3, 7, 9, 19	syl13anc 1328	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑌 + (𝑁‘𝑌)) + (𝑁‘𝑋)) = (𝑌 + ((𝑁‘𝑌) + (𝑁‘𝑋))))
21	4, 10, 15	grplid 17452	. . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ (𝑁‘𝑋) ∈ 𝐵) → ((0g‘𝐺) + (𝑁‘𝑋)) = (𝑁‘𝑋))
22	1, 9, 21	syl2anc 693	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((0g‘𝐺) + (𝑁‘𝑋)) = (𝑁‘𝑋))
23	18, 20, 22	3eqtr3d 2664	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑌 + ((𝑁‘𝑌) + (𝑁‘𝑋))) = (𝑁‘𝑋))
24	23	oveq2d 6666	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + (𝑌 + ((𝑁‘𝑌) + (𝑁‘𝑋)))) = (𝑋 + (𝑁‘𝑋)))
25	4, 10, 15, 5	grprinv 17469	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵) → (𝑋 + (𝑁‘𝑋)) = (0g‘𝐺))
26	25	3adant3 1081	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + (𝑁‘𝑋)) = (0g‘𝐺))
27	14, 24, 26	3eqtrd 2660	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 + 𝑌) + ((𝑁‘𝑌) + (𝑁‘𝑋))) = (0g‘𝐺))
28	4, 10	grpcl 17430	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + 𝑌) ∈ 𝐵)
29	4, 10, 15, 5	grpinvid1 17470	. . 3 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 + 𝑌) ∈ 𝐵 ∧ ((𝑁‘𝑌) + (𝑁‘𝑋)) ∈ 𝐵) → ((𝑁‘(𝑋 + 𝑌)) = ((𝑁‘𝑌) + (𝑁‘𝑋)) ↔ ((𝑋 + 𝑌) + ((𝑁‘𝑌) + (𝑁‘𝑋))) = (0g‘𝐺)))
30	1, 28, 12, 29	syl3anc 1326	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑁‘(𝑋 + 𝑌)) = ((𝑁‘𝑌) + (𝑁‘𝑋)) ↔ ((𝑋 + 𝑌) + ((𝑁‘𝑌) + (𝑁‘𝑋))) = (0g‘𝐺)))
31	27, 30	mpbird 247	1 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑁‘(𝑋 + 𝑌)) = ((𝑁‘𝑌) + (𝑁‘𝑋)))

Syntax hints:   → wi 4   ↔ wb 196   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990  ‘cfv 5888  (class class class)co 6650  Basecbs 15857  +_gcplusg 15941  0_gc0g 16100  Grpcgrp 17422  inv_gcminusg 17423

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-0g 16102  df-mgm 17242  df-sgrp 17284  df-mnd 17295  df-grp 17425  df-minusg 17426

This theorem is referenced by:  grpinvsub  17497  mulgaddcomlem  17563  mulginvcom  17565  mulgdir  17573  eqger  17644  eqgcpbl  17648  invoppggim  17790  sylow2blem1  18035  lsmsubg  18069  ablinvadd  18215  ablsub2inv  18216  invghm  18239  rdivmuldivd  29791  dvrcan5  29793