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Theorem ablnncan 19682
Description: Cancellation law for group subtraction. (nncan 11485 analog.) (Contributed by NM, 7-Apr-2015.)
Hypotheses
Ref Expression
ablnncan.b 𝐵 = (Base‘𝐺)
ablnncan.m = (-g𝐺)
ablnncan.g (𝜑𝐺 ∈ Abel)
ablnncan.x (𝜑𝑋𝐵)
ablnncan.y (𝜑𝑌𝐵)
Assertion
Ref Expression
ablnncan (𝜑 → (𝑋 (𝑋 𝑌)) = 𝑌)

Proof of Theorem ablnncan
StepHypRef Expression
1 ablnncan.b . . 3 𝐵 = (Base‘𝐺)
2 eqid 2732 . . 3 (+g𝐺) = (+g𝐺)
3 ablnncan.m . . 3 = (-g𝐺)
4 ablnncan.g . . 3 (𝜑𝐺 ∈ Abel)
5 ablnncan.x . . 3 (𝜑𝑋𝐵)
6 ablnncan.y . . 3 (𝜑𝑌𝐵)
71, 2, 3, 4, 5, 5, 6ablsubsub 19679 . 2 (𝜑 → (𝑋 (𝑋 𝑌)) = ((𝑋 𝑋)(+g𝐺)𝑌))
8 ablgrp 19647 . . . . 5 (𝐺 ∈ Abel → 𝐺 ∈ Grp)
94, 8syl 17 . . . 4 (𝜑𝐺 ∈ Grp)
10 eqid 2732 . . . . 5 (0g𝐺) = (0g𝐺)
111, 10, 3grpsubid 18903 . . . 4 ((𝐺 ∈ Grp ∧ 𝑋𝐵) → (𝑋 𝑋) = (0g𝐺))
129, 5, 11syl2anc 584 . . 3 (𝜑 → (𝑋 𝑋) = (0g𝐺))
1312oveq1d 7420 . 2 (𝜑 → ((𝑋 𝑋)(+g𝐺)𝑌) = ((0g𝐺)(+g𝐺)𝑌))
141, 2, 10grplid 18848 . . 3 ((𝐺 ∈ Grp ∧ 𝑌𝐵) → ((0g𝐺)(+g𝐺)𝑌) = 𝑌)
159, 6, 14syl2anc 584 . 2 (𝜑 → ((0g𝐺)(+g𝐺)𝑌) = 𝑌)
167, 13, 153eqtrd 2776 1 (𝜑 → (𝑋 (𝑋 𝑌)) = 𝑌)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1541  wcel 2106  cfv 6540  (class class class)co 7405  Basecbs 17140  +gcplusg 17193  0gc0g 17381  Grpcgrp 18815  -gcsg 18817  Abelcabl 19643
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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2703  ax-sep 5298  ax-nul 5305  ax-pow 5362  ax-pr 5426  ax-un 7721
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-ne 2941  df-ral 3062  df-rex 3071  df-rmo 3376  df-reu 3377  df-rab 3433  df-v 3476  df-sbc 3777  df-csb 3893  df-dif 3950  df-un 3952  df-in 3954  df-ss 3964  df-nul 4322  df-if 4528  df-pw 4603  df-sn 4628  df-pr 4630  df-op 4634  df-uni 4908  df-iun 4998  df-br 5148  df-opab 5210  df-mpt 5231  df-id 5573  df-xp 5681  df-rel 5682  df-cnv 5683  df-co 5684  df-dm 5685  df-rn 5686  df-res 5687  df-ima 5688  df-iota 6492  df-fun 6542  df-fn 6543  df-f 6544  df-fv 6548  df-riota 7361  df-ov 7408  df-oprab 7409  df-mpo 7410  df-1st 7971  df-2nd 7972  df-0g 17383  df-mgm 18557  df-sgrp 18606  df-mnd 18622  df-grp 18818  df-minusg 18819  df-sbg 18820  df-cmn 19644  df-abl 19645
This theorem is referenced by:  ablnnncan1  19685  pgpfac1lem3  19941  tsmsxplem1  23648  baerlem5blem2  40571
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