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Theorem ablpncan2 18421
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 1130 . . 3 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → 𝐺 ∈ Abel)
2 simp2 1131 . . 3 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → 𝑋𝐵)
3 simp3 1132 . . 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 18420 . . 3 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵𝑋𝐵)) → ((𝑋 + 𝑌) 𝑋) = ((𝑋 𝑋) + 𝑌))
81, 2, 3, 2, 7syl13anc 1478 . 2 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 + 𝑌) 𝑋) = ((𝑋 𝑋) + 𝑌))
9 ablgrp 18398 . . . . 5 (𝐺 ∈ Abel → 𝐺 ∈ Grp)
101, 9syl 17 . . . 4 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → 𝐺 ∈ Grp)
11 eqid 2771 . . . . 5 (0g𝐺) = (0g𝐺)
124, 11, 6grpsubid 17700 . . . 4 ((𝐺 ∈ Grp ∧ 𝑋𝐵) → (𝑋 𝑋) = (0g𝐺))
1310, 2, 12syl2anc 573 . . 3 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑋) = (0g𝐺))
1413oveq1d 6806 . 2 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 𝑋) + 𝑌) = ((0g𝐺) + 𝑌))
154, 5, 11grplid 17653 . . 3 ((𝐺 ∈ Grp ∧ 𝑌𝐵) → ((0g𝐺) + 𝑌) = 𝑌)
1610, 3, 15syl2anc 573 . 2 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((0g𝐺) + 𝑌) = 𝑌)
178, 14, 163eqtrd 2809 1 ((𝐺 ∈ Abel ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 + 𝑌) 𝑋) = 𝑌)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1071   = wceq 1631  wcel 2145  cfv 6029  (class class class)co 6791  Basecbs 16057  +gcplusg 16142  0gc0g 16301  Grpcgrp 17623  -gcsg 17625  Abelcabl 18394
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-8 2147  ax-9 2154  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408  ax-ext 2751  ax-rep 4904  ax-sep 4915  ax-nul 4923  ax-pow 4974  ax-pr 5034  ax-un 7094
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 837  df-3an 1073  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-eu 2622  df-mo 2623  df-clab 2758  df-cleq 2764  df-clel 2767  df-nfc 2902  df-ne 2944  df-ral 3066  df-rex 3067  df-reu 3068  df-rmo 3069  df-rab 3070  df-v 3353  df-sbc 3588  df-csb 3683  df-dif 3726  df-un 3728  df-in 3730  df-ss 3737  df-nul 4064  df-if 4226  df-pw 4299  df-sn 4317  df-pr 4319  df-op 4323  df-uni 4575  df-iun 4656  df-br 4787  df-opab 4847  df-mpt 4864  df-id 5157  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-iota 5992  df-fun 6031  df-fn 6032  df-f 6033  df-f1 6034  df-fo 6035  df-f1o 6036  df-fv 6037  df-riota 6752  df-ov 6794  df-oprab 6795  df-mpt2 6796  df-1st 7313  df-2nd 7314  df-0g 16303  df-mgm 17443  df-sgrp 17485  df-mnd 17496  df-grp 17626  df-minusg 17627  df-sbg 17628  df-cmn 18395  df-abl 18396
This theorem is referenced by:  lssvancl1  19148  lspprabs  19301  lsmcv  19348  ngpocelbl  22721  ttgcontlem1  25979
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