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Theorem ablnncan 19779
Description: Cancellation law for group subtraction. (nncan 11519 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 2725 . . 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 19776 . 2 (𝜑 → (𝑋 (𝑋 𝑌)) = ((𝑋 𝑋)(+g𝐺)𝑌))
8 ablgrp 19744 . . . . 5 (𝐺 ∈ Abel → 𝐺 ∈ Grp)
94, 8syl 17 . . . 4 (𝜑𝐺 ∈ Grp)
10 eqid 2725 . . . . 5 (0g𝐺) = (0g𝐺)
111, 10, 3grpsubid 18984 . . . 4 ((𝐺 ∈ Grp ∧ 𝑋𝐵) → (𝑋 𝑋) = (0g𝐺))
129, 5, 11syl2anc 582 . . 3 (𝜑 → (𝑋 𝑋) = (0g𝐺))
1312oveq1d 7431 . 2 (𝜑 → ((𝑋 𝑋)(+g𝐺)𝑌) = ((0g𝐺)(+g𝐺)𝑌))
141, 2, 10grplid 18928 . . 3 ((𝐺 ∈ Grp ∧ 𝑌𝐵) → ((0g𝐺)(+g𝐺)𝑌) = 𝑌)
159, 6, 14syl2anc 582 . 2 (𝜑 → ((0g𝐺)(+g𝐺)𝑌) = 𝑌)
167, 13, 153eqtrd 2769 1 (𝜑 → (𝑋 (𝑋 𝑌)) = 𝑌)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1533  wcel 2098  cfv 6543  (class class class)co 7416  Basecbs 17179  +gcplusg 17232  0gc0g 17420  Grpcgrp 18894  -gcsg 18896  Abelcabl 19740
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2166  ax-ext 2696  ax-sep 5294  ax-nul 5301  ax-pow 5359  ax-pr 5423  ax-un 7738
This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2528  df-eu 2557  df-clab 2703  df-cleq 2717  df-clel 2802  df-nfc 2877  df-ne 2931  df-ral 3052  df-rex 3061  df-rmo 3364  df-reu 3365  df-rab 3420  df-v 3465  df-sbc 3769  df-csb 3885  df-dif 3942  df-un 3944  df-in 3946  df-ss 3956  df-nul 4319  df-if 4525  df-pw 4600  df-sn 4625  df-pr 4627  df-op 4631  df-uni 4904  df-iun 4993  df-br 5144  df-opab 5206  df-mpt 5227  df-id 5570  df-xp 5678  df-rel 5679  df-cnv 5680  df-co 5681  df-dm 5682  df-rn 5683  df-res 5684  df-ima 5685  df-iota 6495  df-fun 6545  df-fn 6546  df-f 6547  df-fv 6551  df-riota 7372  df-ov 7419  df-oprab 7420  df-mpo 7421  df-1st 7991  df-2nd 7992  df-0g 17422  df-mgm 18599  df-sgrp 18678  df-mnd 18694  df-grp 18897  df-minusg 18898  df-sbg 18899  df-cmn 19741  df-abl 19742
This theorem is referenced by:  ablnnncan1  19782  pgpfac1lem3  20038  rngqiprngfulem4  21208  tsmsxplem1  24075  baerlem5blem2  41241
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