Theorem ablnncan 19860

Description: Cancellation law for group subtraction. (nncan 11460 analog.) (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)

Assertion

Ref	Expression
ablnncan	⊢ (𝜑 → (𝑋 − (𝑋 − 𝑌)) = 𝑌)

Proof of Theorem ablnncan

Step	Hyp	Ref	Expression
1		ablnncan.b	. . 3 ⊢ 𝐵 = (Base‘𝐺)
2		eqid 2762	. . 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		ablnncan.y	. . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
7	1, 2, 3, 4, 5, 5, 6	ablsubsub 19857	. 2 ⊢ (𝜑 → (𝑋 − (𝑋 − 𝑌)) = ((𝑋 − 𝑋)(+g‘𝐺)𝑌))
8		ablgrp 19825	. . . . 5 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
9	4, 8	syl 17	. . . 4 ⊢ (𝜑 → 𝐺 ∈ Grp)
10		eqid 2762	. . . . 5 ⊢ (0g‘𝐺) = (0g‘𝐺)
11	1, 10, 3	grpsubid 19066	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵) → (𝑋 − 𝑋) = (0g‘𝐺))
12	9, 5, 11	syl2anc 593	. . 3 ⊢ (𝜑 → (𝑋 − 𝑋) = (0g‘𝐺))
13	12	oveq1d 7411	. 2 ⊢ (𝜑 → ((𝑋 − 𝑋)(+g‘𝐺)𝑌) = ((0g‘𝐺)(+g‘𝐺)𝑌))
14	1, 2, 10	grplid 19009	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((0g‘𝐺)(+g‘𝐺)𝑌) = 𝑌)
15	9, 6, 14	syl2anc 593	. 2 ⊢ (𝜑 → ((0g‘𝐺)(+g‘𝐺)𝑌) = 𝑌)
16	7, 13, 15	3eqtrd 2801	1 ⊢ (𝜑 → (𝑋 − (𝑋 − 𝑌)) = 𝑌)

Syntax hints:   → wi 4   = wceq 1560   ∈ wcel 2142  ‘cfv 6521  (class class class)co 7396  Basecbs 17245  +_gcplusg 17286  0_gc0g 17468  Grpcgrp 18975  -_gcsg 18977  Abelcabl 19821

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-sep 5246  ax-nul 5256  ax-pow 5322  ax-pr 5390  ax-un 7718

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-nf 1804  df-sb 2091  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3077  df-rex 3087  df-rmo 3367  df-reu 3368  df-rab 3415  df-v 3456  df-sbc 3745  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4481  df-pw 4557  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-iun 4951  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5542  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-iota 6477  df-fun 6523  df-fn 6524  df-f 6525  df-fv 6529  df-riota 7353  df-ov 7399  df-oprab 7400  df-mpo 7401  df-1st 7970  df-2nd 7971  df-0g 17470  df-mgm 18674  df-sgrp 18753  df-mnd 18769  df-grp 18978  df-minusg 18979  df-sbg 18980  df-cmn 19822  df-abl 19823

This theorem is referenced by:  ablnnncan1  19863  pgpfac1lem3  20119  rngqiprngfulem4  21384  tsmsxplem1  24213  baerlem5blem2  42336