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Theorem grpaddsubass 18121
Description: Associative-type law for group subtraction and addition. (Contributed by NM, 16-Apr-2014.)
Hypotheses
Ref Expression
grpsubadd.b 𝐵 = (Base‘𝐺)
grpsubadd.p + = (+g𝐺)
grpsubadd.m = (-g𝐺)
Assertion
Ref Expression
grpaddsubass ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 + 𝑌) 𝑍) = (𝑋 + (𝑌 𝑍)))

Proof of Theorem grpaddsubass
StepHypRef Expression
1 simpl 483 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝐺 ∈ Grp)
2 simpr1 1188 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋𝐵)
3 simpr2 1189 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌𝐵)
4 grpsubadd.b . . . . 5 𝐵 = (Base‘𝐺)
5 eqid 2825 . . . . 5 (invg𝐺) = (invg𝐺)
64, 5grpinvcl 18083 . . . 4 ((𝐺 ∈ Grp ∧ 𝑍𝐵) → ((invg𝐺)‘𝑍) ∈ 𝐵)
763ad2antr3 1184 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((invg𝐺)‘𝑍) ∈ 𝐵)
8 grpsubadd.p . . . 4 + = (+g𝐺)
94, 8grpass 18044 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵 ∧ ((invg𝐺)‘𝑍) ∈ 𝐵)) → ((𝑋 + 𝑌) + ((invg𝐺)‘𝑍)) = (𝑋 + (𝑌 + ((invg𝐺)‘𝑍))))
101, 2, 3, 7, 9syl13anc 1366 . 2 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 + 𝑌) + ((invg𝐺)‘𝑍)) = (𝑋 + (𝑌 + ((invg𝐺)‘𝑍))))
114, 8grpcl 18043 . . . 4 ((𝐺 ∈ Grp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 + 𝑌) ∈ 𝐵)
12113adant3r3 1178 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 + 𝑌) ∈ 𝐵)
13 simpr3 1190 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍𝐵)
14 grpsubadd.m . . . 4 = (-g𝐺)
154, 8, 5, 14grpsubval 18081 . . 3 (((𝑋 + 𝑌) ∈ 𝐵𝑍𝐵) → ((𝑋 + 𝑌) 𝑍) = ((𝑋 + 𝑌) + ((invg𝐺)‘𝑍)))
1612, 13, 15syl2anc 584 . 2 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 + 𝑌) 𝑍) = ((𝑋 + 𝑌) + ((invg𝐺)‘𝑍)))
174, 8, 5, 14grpsubval 18081 . . . 4 ((𝑌𝐵𝑍𝐵) → (𝑌 𝑍) = (𝑌 + ((invg𝐺)‘𝑍)))
183, 13, 17syl2anc 584 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑍) = (𝑌 + ((invg𝐺)‘𝑍)))
1918oveq2d 7167 . 2 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 + (𝑌 𝑍)) = (𝑋 + (𝑌 + ((invg𝐺)‘𝑍))))
2010, 16, 193eqtr4d 2870 1 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 + 𝑌) 𝑍) = (𝑋 + (𝑌 𝑍)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 396  w3a 1081   = wceq 1530  wcel 2107  cfv 6351  (class class class)co 7151  Basecbs 16475  +gcplusg 16557  Grpcgrp 18035  invgcminusg 18036  -gcsg 18037
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 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2797  ax-sep 5199  ax-nul 5206  ax-pow 5262  ax-pr 5325  ax-un 7454
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2619  df-eu 2651  df-clab 2804  df-cleq 2818  df-clel 2897  df-nfc 2967  df-ne 3021  df-ral 3147  df-rex 3148  df-reu 3149  df-rmo 3150  df-rab 3151  df-v 3501  df-sbc 3776  df-csb 3887  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-nul 4295  df-if 4470  df-pw 4543  df-sn 4564  df-pr 4566  df-op 4570  df-uni 4837  df-iun 4918  df-br 5063  df-opab 5125  df-mpt 5143  df-id 5458  df-xp 5559  df-rel 5560  df-cnv 5561  df-co 5562  df-dm 5563  df-rn 5564  df-res 5565  df-ima 5566  df-iota 6311  df-fun 6353  df-fn 6354  df-f 6355  df-fv 6359  df-riota 7109  df-ov 7154  df-oprab 7155  df-mpo 7156  df-1st 7683  df-2nd 7684  df-0g 16707  df-mgm 17844  df-sgrp 17892  df-mnd 17903  df-grp 18038  df-minusg 18039  df-sbg 18040
This theorem is referenced by:  grppncan  18122  grpnpncan  18126  nsgconj  18243  conjghm  18321  conjnmz  18324  conjnmzb  18325  sylow3lem1  18674  sylow3lem2  18675  abladdsub  18857  ablsubsub  18860  cpmadugsumlemF  21402  archiabllem2a  30739
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