Theorem grpnpncan0 18189

Description: Cancellation law for group subtraction (npncan2 10907 analog). (Contributed by AV, 24-Nov-2019.)

Hypotheses

Ref	Expression
grpsubadd.b	⊢ 𝐵 = (Base‘𝐺)
grpsubadd.p	⊢ + = (+g‘𝐺)
grpsubadd.m	⊢ − = (-g‘𝐺)
grpnpncan0.0	⊢ 0 = (0g‘𝐺)

Assertion

Ref	Expression
grpnpncan0	⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → ((𝑋 − 𝑌) + (𝑌 − 𝑋)) = 0 )

Proof of Theorem grpnpncan0

Step	Hyp	Ref	Expression
1		simpl 485	. . 3 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → 𝐺 ∈ Grp)
2		simprl 769	. . 3 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → 𝑋 ∈ 𝐵)
3		simprr 771	. . 3 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → 𝑌 ∈ 𝐵)
4		grpsubadd.b	. . . 4 ⊢ 𝐵 = (Base‘𝐺)
5		grpsubadd.p	. . . 4 ⊢ + = (+g‘𝐺)
6		grpsubadd.m	. . . 4 ⊢ − = (-g‘𝐺)
7	4, 5, 6	grpnpncan 18188	. . 3 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵)) → ((𝑋 − 𝑌) + (𝑌 − 𝑋)) = (𝑋 − 𝑋))
8	1, 2, 3, 2, 7	syl13anc 1368	. 2 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → ((𝑋 − 𝑌) + (𝑌 − 𝑋)) = (𝑋 − 𝑋))
9		grpnpncan0.0	. . . 4 ⊢ 0 = (0g‘𝐺)
10	4, 9, 6	grpsubid 18177	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵) → (𝑋 − 𝑋) = 0 )
11	10	adantrr 715	. 2 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → (𝑋 − 𝑋) = 0 )
12	8, 11	eqtrd 2856	1 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → ((𝑋 − 𝑌) + (𝑌 − 𝑋)) = 0 )

Syntax hints:   → wi 4   ∧ wa 398   = wceq 1533   ∈ wcel 2110  ‘cfv 6350  (class class class)co 7150  Basecbs 16477  +_gcplusg 16559  0_gc0g 16707  Grpcgrp 18097  -_gcsg 18099

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 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  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 3497  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-iota 6309  df-fun 6352  df-fn 6353  df-f 6354  df-fv 6358  df-riota 7108  df-ov 7153  df-oprab 7154  df-mpo 7155  df-1st 7683  df-2nd 7684  df-0g 16709  df-mgm 17846  df-sgrp 17895  df-mnd 17906  df-grp 18100  df-minusg 18101  df-sbg 18102

This theorem is referenced by:  cayhamlem1  21468