Theorem grpsubadd0sub 18267

Description: Subtraction expressed as addition of the difference of the identity element and the subtrahend. (Contributed by AV, 9-Nov-2019.)

Hypotheses

Ref	Expression
grpsubid.b	⊢ 𝐵 = (Base‘𝐺)
grpsubid.o	⊢ 0 = (0g‘𝐺)
grpsubid.m	⊢ − = (-g‘𝐺)
grpsubadd0sub.p	⊢ + = (+g‘𝐺)

Assertion

Ref	Expression
grpsubadd0sub	⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋 + ( 0 − 𝑌)))

Proof of Theorem grpsubadd0sub

Step	Hyp	Ref	Expression
1		grpsubid.b	. . . 4 ⊢ 𝐵 = (Base‘𝐺)
2		grpsubadd0sub.p	. . . 4 ⊢ + = (+g‘𝐺)
3		eqid 2758	. . . 4 ⊢ (invg‘𝐺) = (invg‘𝐺)
4		grpsubid.m	. . . 4 ⊢ − = (-g‘𝐺)
5	1, 2, 3, 4	grpsubval 18230	. . 3 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋 + ((invg‘𝐺)‘𝑌)))
6	5	3adant1 1127	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋 + ((invg‘𝐺)‘𝑌)))
7		grpsubid.o	. . . . 5 ⊢ 0 = (0g‘𝐺)
8	1, 4, 3, 7	grpinvval2 18263	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) = ( 0 − 𝑌))
9	8	3adant2 1128	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) = ( 0 − 𝑌))
10	9	oveq2d 7172	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + ((invg‘𝐺)‘𝑌)) = (𝑋 + ( 0 − 𝑌)))
11	6, 10	eqtrd 2793	1 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋 + ( 0 − 𝑌)))

Syntax hints:   → wi 4   ∧ w3a 1084   = wceq 1538   ∈ wcel 2111  ‘cfv 6340  (class class class)co 7156  Basecbs 16555  +_gcplusg 16637  0_gc0g 16785  Grpcgrp 18183  inv_gcminusg 18184  -_gcsg 18185

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2729  ax-sep 5173  ax-nul 5180  ax-pow 5238  ax-pr 5302  ax-un 7465

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2557  df-eu 2588  df-clab 2736  df-cleq 2750  df-clel 2830  df-nfc 2901  df-ne 2952  df-ral 3075  df-rex 3076  df-reu 3077  df-rmo 3078  df-rab 3079  df-v 3411  df-sbc 3699  df-csb 3808  df-dif 3863  df-un 3865  df-in 3867  df-ss 3877  df-nul 4228  df-if 4424  df-pw 4499  df-sn 4526  df-pr 4528  df-op 4532  df-uni 4802  df-iun 4888  df-br 5037  df-opab 5099  df-mpt 5117  df-id 5434  df-xp 5534  df-rel 5535  df-cnv 5536  df-co 5537  df-dm 5538  df-rn 5539  df-res 5540  df-ima 5541  df-iota 6299  df-fun 6342  df-fn 6343  df-f 6344  df-fv 6348  df-riota 7114  df-ov 7159  df-oprab 7160  df-mpo 7161  df-1st 7699  df-2nd 7700  df-0g 16787  df-mgm 17932  df-sgrp 17981  df-mnd 17992  df-grp 18186  df-minusg 18187  df-sbg 18188

This theorem is referenced by:  chfacfscmulgsum  21574  chfacfpmmulgsum  21578