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Theorem ablpncan2 18932
 Description: Cancellation law for subtraction. (Contributed by NM, 2-Oct-2014.)
Hypotheses
Ref Expression
ablsubadd.b 𝐵 = (Base‘𝐺)
ablsubadd.p + = (+g𝐺)
ablsubadd.m = (-g𝐺)
Assertion
Ref Expression
ablpncan2 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 + 𝑌) 𝑋) = 𝑌)

Proof of Theorem ablpncan2
StepHypRef Expression
1 simp1 1133 . . 3 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → 𝐺 ∈ Abel)
2 simp2 1134 . . 3 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → 𝑋𝐵)
3 simp3 1135 . . 3 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → 𝑌𝐵)
4 ablsubadd.b . . . 4 𝐵 = (Base‘𝐺)
5 ablsubadd.p . . . 4 + = (+g𝐺)
6 ablsubadd.m . . . 4 = (-g𝐺)
74, 5, 6abladdsub 18931 . . 3 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵𝑋𝐵)) → ((𝑋 + 𝑌) 𝑋) = ((𝑋 𝑋) + 𝑌))
81, 2, 3, 2, 7syl13anc 1369 . 2 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 + 𝑌) 𝑋) = ((𝑋 𝑋) + 𝑌))
9 ablgrp 18906 . . . . 5 (𝐺 ∈ Abel → 𝐺 ∈ Grp)
101, 9syl 17 . . . 4 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → 𝐺 ∈ Grp)
11 eqid 2801 . . . . 5 (0g𝐺) = (0g𝐺)
124, 11, 6grpsubid 18178 . . . 4 ((𝐺 ∈ Grp ∧ 𝑋𝐵) → (𝑋 𝑋) = (0g𝐺))
1310, 2, 12syl2anc 587 . . 3 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑋) = (0g𝐺))
1413oveq1d 7154 . 2 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 𝑋) + 𝑌) = ((0g𝐺) + 𝑌))
154, 5, 11grplid 18128 . . 3 ((𝐺 ∈ Grp ∧ 𝑌𝐵) → ((0g𝐺) + 𝑌) = 𝑌)
1610, 3, 15syl2anc 587 . 2 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((0g𝐺) + 𝑌) = 𝑌)
178, 14, 163eqtrd 2840 1 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 + 𝑌) 𝑋) = 𝑌)
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ w3a 1084   = wceq 1538   ∈ wcel 2112  ‘cfv 6328  (class class class)co 7139  Basecbs 16478  +gcplusg 16560  0gc0g 16708  Grpcgrp 18098  -gcsg 18100  Abelcabl 18902 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 1911  ax-6 1970  ax-7 2015  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2773  ax-sep 5170  ax-nul 5177  ax-pow 5234  ax-pr 5298  ax-un 7445 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2601  df-eu 2632  df-clab 2780  df-cleq 2794  df-clel 2873  df-nfc 2941  df-ne 2991  df-ral 3114  df-rex 3115  df-reu 3116  df-rmo 3117  df-rab 3118  df-v 3446  df-sbc 3724  df-csb 3832  df-dif 3887  df-un 3889  df-in 3891  df-ss 3901  df-nul 4247  df-if 4429  df-pw 4502  df-sn 4529  df-pr 4531  df-op 4535  df-uni 4804  df-iun 4886  df-br 5034  df-opab 5096  df-mpt 5114  df-id 5428  df-xp 5529  df-rel 5530  df-cnv 5531  df-co 5532  df-dm 5533  df-rn 5534  df-res 5535  df-ima 5536  df-iota 6287  df-fun 6330  df-fn 6331  df-f 6332  df-fv 6336  df-riota 7097  df-ov 7142  df-oprab 7143  df-mpo 7144  df-1st 7675  df-2nd 7676  df-0g 16710  df-mgm 17847  df-sgrp 17896  df-mnd 17907  df-grp 18101  df-minusg 18102  df-sbg 18103  df-cmn 18903  df-abl 18904 This theorem is referenced by:  lssvancl1  19712  lspprabs  19863  lsmcv  19909  ngpocelbl  23313  ttgcontlem1  26682
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