Theorem ablsub32 19890

Description: Swap the second and third terms in a double group subtraction. (Contributed by NM, 7-Apr-2015.)

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
ablsub32	⊢ (𝜑 → ((𝑋 − 𝑌) − 𝑍) = ((𝑋 − 𝑍) − 𝑌))

Proof of Theorem ablsub32

Step	Hyp	Ref	Expression
1		ablnncan.g	. . . 4 ⊢ (𝜑 → 𝐺 ∈ Abel)
2		ablnncan.y	. . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
3		ablsub32.z	. . . 4 ⊢ (𝜑 → 𝑍 ∈ 𝐵)
4		ablnncan.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐺)
5		eqid 2761	. . . . 5 ⊢ (+g‘𝐺) = (+g‘𝐺)
6	4, 5	ablcom 19868	. . . 4 ⊢ ((𝐺 ∈ Abel ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑌(+g‘𝐺)𝑍) = (𝑍(+g‘𝐺)𝑌))
7	1, 2, 3, 6	syl3anc 1396	. . 3 ⊢ (𝜑 → (𝑌(+g‘𝐺)𝑍) = (𝑍(+g‘𝐺)𝑌))
8	7	oveq2d 7426	. 2 ⊢ (𝜑 → (𝑋 − (𝑌(+g‘𝐺)𝑍)) = (𝑋 − (𝑍(+g‘𝐺)𝑌)))
9		ablnncan.m	. . 3 ⊢ − = (-g‘𝐺)
10		ablnncan.x	. . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
11	4, 5, 9, 1, 10, 2, 3	ablsubsub4 19887	. 2 ⊢ (𝜑 → ((𝑋 − 𝑌) − 𝑍) = (𝑋 − (𝑌(+g‘𝐺)𝑍)))
12	4, 5, 9, 1, 10, 3, 2	ablsubsub4 19887	. 2 ⊢ (𝜑 → ((𝑋 − 𝑍) − 𝑌) = (𝑋 − (𝑍(+g‘𝐺)𝑌)))
13	8, 11, 12	3eqtr4d 2806	1 ⊢ (𝜑 → ((𝑋 − 𝑌) − 𝑍) = ((𝑋 − 𝑍) − 𝑌))

Syntax hints:   → wi 4   = wceq 1568   ∈ wcel 2141  ‘cfv 6536  (class class class)co 7410  Basecbs 17268  +_gcplusg 17309  -_gcsg 19001  Abelcabl 19850

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5256  ax-nul 5268  ax-pow 5336  ax-pr 5404  ax-un 7732

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-nf 1812  df-sb 2095  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rmo 3367  df-reu 3368  df-rab 3415  df-v 3455  df-sbc 3744  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-pw 4563  df-sn 4589  df-pr 4591  df-op 4595  df-uni 4872  df-iun 4957  df-br 5109  df-opab 5173  df-mpt 5192  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-fv 6544  df-riota 7367  df-ov 7413  df-oprab 7414  df-mpo 7415  df-1st 7985  df-2nd 7986  df-0g 17493  df-mgm 18697  df-sgrp 18776  df-mnd 18792  df-grp 19002  df-minusg 19003  df-sbg 19004  df-cmn 19851  df-abl 19852

This theorem is referenced by:  ablnnncan1  19892  baerlem5alem2  42431