Theorem grpsubpropd 18286

Description: Weak property deduction for the group subtraction operation. (Contributed by Mario Carneiro, 27-Mar-2015.)

Hypotheses

Ref	Expression
grpsubpropd.b	⊢ (𝜑 → (Base‘𝐺) = (Base‘𝐻))
grpsubpropd.p	⊢ (𝜑 → (+g‘𝐺) = (+g‘𝐻))

Assertion

Ref	Expression
grpsubpropd	⊢ (𝜑 → (-g‘𝐺) = (-g‘𝐻))

Proof of Theorem grpsubpropd

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

Step	Hyp	Ref	Expression
1		grpsubpropd.b	. . 3 ⊢ (𝜑 → (Base‘𝐺) = (Base‘𝐻))
2		grpsubpropd.p	. . . 4 ⊢ (𝜑 → (+g‘𝐺) = (+g‘𝐻))
3		eqidd 2760	. . . 4 ⊢ (𝜑 → 𝑎 = 𝑎)
4		eqidd 2760	. . . . . 6 ⊢ (𝜑 → (Base‘𝐺) = (Base‘𝐺))
5	2	oveqdr 7185	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐺) ∧ 𝑦 ∈ (Base‘𝐺))) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦))
6	4, 1, 5	grpinvpropd 18256	. . . . 5 ⊢ (𝜑 → (invg‘𝐺) = (invg‘𝐻))
7	6	fveq1d 6666	. . . 4 ⊢ (𝜑 → ((invg‘𝐺)‘𝑏) = ((invg‘𝐻)‘𝑏))
8	2, 3, 7	oveq123d 7178	. . 3 ⊢ (𝜑 → (𝑎(+g‘𝐺)((invg‘𝐺)‘𝑏)) = (𝑎(+g‘𝐻)((invg‘𝐻)‘𝑏)))
9	1, 1, 8	mpoeq123dv 7230	. 2 ⊢ (𝜑 → (𝑎 ∈ (Base‘𝐺), 𝑏 ∈ (Base‘𝐺) ↦ (𝑎(+g‘𝐺)((invg‘𝐺)‘𝑏))) = (𝑎 ∈ (Base‘𝐻), 𝑏 ∈ (Base‘𝐻) ↦ (𝑎(+g‘𝐻)((invg‘𝐻)‘𝑏))))
10		eqid 2759	. . 3 ⊢ (Base‘𝐺) = (Base‘𝐺)
11		eqid 2759	. . 3 ⊢ (+g‘𝐺) = (+g‘𝐺)
12		eqid 2759	. . 3 ⊢ (invg‘𝐺) = (invg‘𝐺)
13		eqid 2759	. . 3 ⊢ (-g‘𝐺) = (-g‘𝐺)
14	10, 11, 12, 13	grpsubfval 18229	. 2 ⊢ (-g‘𝐺) = (𝑎 ∈ (Base‘𝐺), 𝑏 ∈ (Base‘𝐺) ↦ (𝑎(+g‘𝐺)((invg‘𝐺)‘𝑏)))
15		eqid 2759	. . 3 ⊢ (Base‘𝐻) = (Base‘𝐻)
16		eqid 2759	. . 3 ⊢ (+g‘𝐻) = (+g‘𝐻)
17		eqid 2759	. . 3 ⊢ (invg‘𝐻) = (invg‘𝐻)
18		eqid 2759	. . 3 ⊢ (-g‘𝐻) = (-g‘𝐻)
19	15, 16, 17, 18	grpsubfval 18229	. 2 ⊢ (-g‘𝐻) = (𝑎 ∈ (Base‘𝐻), 𝑏 ∈ (Base‘𝐻) ↦ (𝑎(+g‘𝐻)((invg‘𝐻)‘𝑏)))
20	9, 14, 19	3eqtr4g 2819	1 ⊢ (𝜑 → (-g‘𝐺) = (-g‘𝐻))

Syntax hints:   → wi 4   ∧ wa 399   = wceq 1539   ∈ wcel 2112  ‘cfv 6341  (class class class)co 7157   ∈ cmpo 7159  Basecbs 16556  +_gcplusg 16638  inv_gcminusg 18185  -_gcsg 18186

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 1912  ax-6 1971  ax-7 2016  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2730  ax-sep 5174  ax-nul 5181  ax-pow 5239  ax-pr 5303  ax-un 7466

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2071  df-mo 2558  df-eu 2589  df-clab 2737  df-cleq 2751  df-clel 2831  df-nfc 2902  df-ne 2953  df-ral 3076  df-rex 3077  df-reu 3078  df-rab 3080  df-v 3412  df-sbc 3700  df-csb 3809  df-dif 3864  df-un 3866  df-in 3868  df-ss 3878  df-nul 4229  df-if 4425  df-pw 4500  df-sn 4527  df-pr 4529  df-op 4533  df-uni 4803  df-iun 4889  df-br 5038  df-opab 5100  df-mpt 5118  df-id 5435  df-xp 5535  df-rel 5536  df-cnv 5537  df-co 5538  df-dm 5539  df-rn 5540  df-res 5541  df-ima 5542  df-iota 6300  df-fun 6343  df-fn 6344  df-f 6345  df-fv 6349  df-riota 7115  df-ov 7160  df-oprab 7161  df-mpo 7162  df-1st 7700  df-2nd 7701  df-0g 16788  df-minusg 18188  df-sbg 18189

This theorem is referenced by:  rlmsub  20053  matsubg  21147  tngngp2  23369  tngngp  23371  tcphsub  23936  ply1divalg2  24853  ttgsub  26787  zhmnrg  31450