Theorem ablnnncan 19424

Description: Cancellation law for group subtraction. (nnncan 11256 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 2738	. . 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 19391	. . . . 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 18655	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑌 − 𝑍) ∈ 𝐵)
11	7, 8, 9, 10	syl3anc 1370	. . 3 ⊢ (𝜑 → (𝑌 − 𝑍) ∈ 𝐵)
12	1, 2, 3, 4, 5, 11, 9	ablsubsub4 19420	. 2 ⊢ (𝜑 → ((𝑋 − (𝑌 − 𝑍)) − 𝑍) = (𝑋 − ((𝑌 − 𝑍)(+g‘𝐺)𝑍)))
13	1, 2	ablcom 19404	. . . . 5 ⊢ ((𝐺 ∈ Abel ∧ (𝑌 − 𝑍) ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → ((𝑌 − 𝑍)(+g‘𝐺)𝑍) = (𝑍(+g‘𝐺)(𝑌 − 𝑍)))
14	4, 11, 9, 13	syl3anc 1370	. . . 4 ⊢ (𝜑 → ((𝑌 − 𝑍)(+g‘𝐺)𝑍) = (𝑍(+g‘𝐺)(𝑌 − 𝑍)))
15	1, 2, 3	ablpncan3 19418	. . . . 5 ⊢ ((𝐺 ∈ Abel ∧ (𝑍 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → (𝑍(+g‘𝐺)(𝑌 − 𝑍)) = 𝑌)
16	4, 9, 8, 15	syl12anc 834	. . . 4 ⊢ (𝜑 → (𝑍(+g‘𝐺)(𝑌 − 𝑍)) = 𝑌)
17	14, 16	eqtrd 2778	. . 3 ⊢ (𝜑 → ((𝑌 − 𝑍)(+g‘𝐺)𝑍) = 𝑌)
18	17	oveq2d 7291	. 2 ⊢ (𝜑 → (𝑋 − ((𝑌 − 𝑍)(+g‘𝐺)𝑍)) = (𝑋 − 𝑌))
19	12, 18	eqtrd 2778	1 ⊢ (𝜑 → ((𝑋 − (𝑌 − 𝑍)) − 𝑍) = (𝑋 − 𝑌))

Syntax hints:   → wi 4   = wceq 1539   ∈ wcel 2106  ‘cfv 6433  (class class class)co 7275  Basecbs 16912  +_gcplusg 16962  Grpcgrp 18577  -_gcsg 18579  Abelcabl 19387

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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-iun 4926  df-br 5075  df-opab 5137  df-mpt 5158  df-id 5489  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-fv 6441  df-riota 7232  df-ov 7278  df-oprab 7279  df-mpo 7280  df-1st 7831  df-2nd 7832  df-0g 17152  df-mgm 18326  df-sgrp 18375  df-mnd 18386  df-grp 18580  df-minusg 18581  df-sbg 18582  df-cmn 19388  df-abl 19389

This theorem is referenced by: (None)