Theorem grpsubadd0sub 19093

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 2769	. . . 4 ⊢ (invg‘𝐺) = (invg‘𝐺)
4		grpsubid.m	. . . 4 ⊢ − = (-g‘𝐺)
5	1, 2, 3, 4	grpsubval 19052	. . 3 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋 + ((invg‘𝐺)‘𝑌)))
6	5	3adant1 1146	. 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 19089	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) = ( 0 − 𝑌))
9	8	3adant2 1147	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) = ( 0 − 𝑌))
10	9	oveq2d 7427	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + ((invg‘𝐺)‘𝑌)) = (𝑋 + ( 0 − 𝑌)))
11	6, 10	eqtrd 2804	1 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋 + ( 0 − 𝑌)))

Syntax hints:   → wi 4   ∧ w3a 1101   = wceq 1567   ∈ wcel 2149  ‘cfv 6537  (class class class)co 7411  Basecbs 17269  +_gcplusg 17310  0_gc0g 17492  Grpcgrp 19000  inv_gcminusg 19001  -_gcsg 19002

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5259  ax-nul 5271  ax-pow 5337  ax-pr 5405  ax-un 7733

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rmo 3375  df-reu 3376  df-rab 3423  df-v 3463  df-sbc 3752  df-csb 3860  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4293  df-if 4491  df-pw 4567  df-sn 4593  df-pr 4595  df-op 4599  df-uni 4875  df-iun 4960  df-br 5112  df-opab 5176  df-mpt 5195  df-id 5557  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-res 5674  df-ima 5675  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-fv 6545  df-riota 7368  df-ov 7414  df-oprab 7415  df-mpo 7416  df-1st 7986  df-2nd 7987  df-0g 17494  df-mgm 18698  df-sgrp 18777  df-mnd 18793  df-grp 19003  df-minusg 19004  df-sbg 19005

This theorem is referenced by:  chfacfscmulgsum  22986  chfacfpmmulgsum  22990