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Theorem ablpncan3 19333
Description: A cancellation law for commutative groups. (Contributed by NM, 23-Mar-2015.)
Hypotheses
Ref Expression
ablsubadd.b 𝐵 = (Base‘𝐺)
ablsubadd.p + = (+g𝐺)
ablsubadd.m = (-g𝐺)
Assertion
Ref Expression
ablpncan3 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → (𝑋 + (𝑌 𝑋)) = 𝑌)

Proof of Theorem ablpncan3
StepHypRef Expression
1 simpl 482 . . 3 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → 𝐺 ∈ Abel)
2 simprl 767 . . 3 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → 𝑋𝐵)
3 ablgrp 19306 . . . . 5 (𝐺 ∈ Abel → 𝐺 ∈ Grp)
43adantr 480 . . . 4 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → 𝐺 ∈ Grp)
5 simprr 769 . . . 4 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → 𝑌𝐵)
6 ablsubadd.b . . . . 5 𝐵 = (Base‘𝐺)
7 ablsubadd.m . . . . 5 = (-g𝐺)
86, 7grpsubcl 18570 . . . 4 ((𝐺 ∈ Grp ∧ 𝑌𝐵𝑋𝐵) → (𝑌 𝑋) ∈ 𝐵)
94, 5, 2, 8syl3anc 1369 . . 3 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → (𝑌 𝑋) ∈ 𝐵)
10 ablsubadd.p . . . 4 + = (+g𝐺)
116, 10ablcom 19319 . . 3 ((𝐺 ∈ Abel ∧ 𝑋𝐵 ∧ (𝑌 𝑋) ∈ 𝐵) → (𝑋 + (𝑌 𝑋)) = ((𝑌 𝑋) + 𝑋))
121, 2, 9, 11syl3anc 1369 . 2 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → (𝑋 + (𝑌 𝑋)) = ((𝑌 𝑋) + 𝑋))
136, 10, 7grpnpcan 18582 . . 3 ((𝐺 ∈ Grp ∧ 𝑌𝐵𝑋𝐵) → ((𝑌 𝑋) + 𝑋) = 𝑌)
144, 5, 2, 13syl3anc 1369 . 2 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → ((𝑌 𝑋) + 𝑋) = 𝑌)
1512, 14eqtrd 2778 1 ((𝐺 ∈ Abel ∧ (𝑋𝐵𝑌𝐵)) → (𝑋 + (𝑌 𝑋)) = 𝑌)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1539  wcel 2108  cfv 6418  (class class class)co 7255  Basecbs 16840  +gcplusg 16888  Grpcgrp 18492  -gcsg 18494  Abelcabl 19302
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-ral 3068  df-rex 3069  df-reu 3070  df-rmo 3071  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-fv 6426  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-1st 7804  df-2nd 7805  df-0g 17069  df-mgm 18241  df-sgrp 18290  df-mnd 18301  df-grp 18495  df-minusg 18496  df-sbg 18497  df-cmn 19303  df-abl 19304
This theorem is referenced by:  ablnnncan  19339  tsmsxplem2  23213  pjthlem2  24507
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