Theorem ablnnncan 19768

Description: Cancellation law for group subtraction. (nnncan 11430 analog.) (Contributed by NM, 29-Feb-2008.) (Revised by AV, 27-Aug-2021.)

Hypotheses

Ref	Expression
ablnncan.b	⊢ 𝐵 = (Base‘𝐺)
ablnncan.m	⊢ − = (-g‘𝐺)
ablnncan.g	⊢ (𝜑 → 𝐺 ∈ Abel)
ablnncan.x	⊢ (𝜑 → 𝑋 ∈ 𝐵)
ablnncan.y	⊢ (𝜑 → 𝑌 ∈ 𝐵)
ablsub32.z	⊢ (𝜑 → 𝑍 ∈ 𝐵)

Assertion

Ref	Expression
ablnnncan	⊢ (𝜑 → ((𝑋 − (𝑌 − 𝑍)) − 𝑍) = (𝑋 − 𝑌))

Proof of Theorem ablnnncan

Step	Hyp	Ref	Expression
1		ablnncan.b	. . 3 ⊢ 𝐵 = (Base‘𝐺)
2		eqid 2737	. . 3 ⊢ (+g‘𝐺) = (+g‘𝐺)
3		ablnncan.m	. . 3 ⊢ − = (-g‘𝐺)
4		ablnncan.g	. . 3 ⊢ (𝜑 → 𝐺 ∈ Abel)
5		ablnncan.x	. . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
6		ablgrp 19731	. . . . 5 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
7	4, 6	syl 17	. . . 4 ⊢ (𝜑 → 𝐺 ∈ Grp)
8		ablnncan.y	. . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
9		ablsub32.z	. . . 4 ⊢ (𝜑 → 𝑍 ∈ 𝐵)
10	1, 3	grpsubcl 18967	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑌 − 𝑍) ∈ 𝐵)
11	7, 8, 9, 10	syl3anc 1374	. . 3 ⊢ (𝜑 → (𝑌 − 𝑍) ∈ 𝐵)
12	1, 2, 3, 4, 5, 11, 9	ablsubsub4 19764	. 2 ⊢ (𝜑 → ((𝑋 − (𝑌 − 𝑍)) − 𝑍) = (𝑋 − ((𝑌 − 𝑍)(+g‘𝐺)𝑍)))
13	1, 2	ablcom 19745	. . . . 5 ⊢ ((𝐺 ∈ Abel ∧ (𝑌 − 𝑍) ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → ((𝑌 − 𝑍)(+g‘𝐺)𝑍) = (𝑍(+g‘𝐺)(𝑌 − 𝑍)))
14	4, 11, 9, 13	syl3anc 1374	. . . 4 ⊢ (𝜑 → ((𝑌 − 𝑍)(+g‘𝐺)𝑍) = (𝑍(+g‘𝐺)(𝑌 − 𝑍)))
15	1, 2, 3	ablpncan3 19762	. . . . 5 ⊢ ((𝐺 ∈ Abel ∧ (𝑍 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → (𝑍(+g‘𝐺)(𝑌 − 𝑍)) = 𝑌)
16	4, 9, 8, 15	syl12anc 837	. . . 4 ⊢ (𝜑 → (𝑍(+g‘𝐺)(𝑌 − 𝑍)) = 𝑌)
17	14, 16	eqtrd 2772	. . 3 ⊢ (𝜑 → ((𝑌 − 𝑍)(+g‘𝐺)𝑍) = 𝑌)
18	17	oveq2d 7386	. 2 ⊢ (𝜑 → (𝑋 − ((𝑌 − 𝑍)(+g‘𝐺)𝑍)) = (𝑋 − 𝑌))
19	12, 18	eqtrd 2772	1 ⊢ (𝜑 → ((𝑋 − (𝑌 − 𝑍)) − 𝑍) = (𝑋 − 𝑌))

Syntax hints:   → wi 4   = wceq 1542   ∈ wcel 2114  ‘cfv 6502  (class class class)co 7370  Basecbs 17150  +_gcplusg 17191  Grpcgrp 18880  -_gcsg 18882  Abelcabl 19727

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 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-sep 5245  ax-nul 5255  ax-pow 5314  ax-pr 5381  ax-un 7692

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-rmo 3352  df-reu 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5529  df-xp 5640  df-rel 5641  df-cnv 5642  df-co 5643  df-dm 5644  df-rn 5645  df-res 5646  df-ima 5647  df-iota 6458  df-fun 6504  df-fn 6505  df-f 6506  df-fv 6510  df-riota 7327  df-ov 7373  df-oprab 7374  df-mpo 7375  df-1st 7945  df-2nd 7946  df-0g 17375  df-mgm 18579  df-sgrp 18658  df-mnd 18674  df-grp 18883  df-minusg 18884  df-sbg 18885  df-cmn 19728  df-abl 19729

This theorem is referenced by: (None)