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Theorem grpsubrcan 18637
Description: Right cancellation law for group subtraction. (Contributed by NM, 31-Mar-2014.)
Hypotheses
Ref Expression
grpsubcl.b 𝐵 = (Base‘𝐺)
grpsubcl.m = (-g𝐺)
Assertion
Ref Expression
grpsubrcan ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑍) = (𝑌 𝑍) ↔ 𝑋 = 𝑌))

Proof of Theorem grpsubrcan
StepHypRef Expression
1 grpsubcl.b . . . . . 6 𝐵 = (Base‘𝐺)
2 eqid 2739 . . . . . 6 (+g𝐺) = (+g𝐺)
3 eqid 2739 . . . . . 6 (invg𝐺) = (invg𝐺)
4 grpsubcl.m . . . . . 6 = (-g𝐺)
51, 2, 3, 4grpsubval 18606 . . . . 5 ((𝑋𝐵𝑍𝐵) → (𝑋 𝑍) = (𝑋(+g𝐺)((invg𝐺)‘𝑍)))
653adant2 1129 . . . 4 ((𝑋𝐵𝑌𝐵𝑍𝐵) → (𝑋 𝑍) = (𝑋(+g𝐺)((invg𝐺)‘𝑍)))
71, 2, 3, 4grpsubval 18606 . . . . 5 ((𝑌𝐵𝑍𝐵) → (𝑌 𝑍) = (𝑌(+g𝐺)((invg𝐺)‘𝑍)))
873adant1 1128 . . . 4 ((𝑋𝐵𝑌𝐵𝑍𝐵) → (𝑌 𝑍) = (𝑌(+g𝐺)((invg𝐺)‘𝑍)))
96, 8eqeq12d 2755 . . 3 ((𝑋𝐵𝑌𝐵𝑍𝐵) → ((𝑋 𝑍) = (𝑌 𝑍) ↔ (𝑋(+g𝐺)((invg𝐺)‘𝑍)) = (𝑌(+g𝐺)((invg𝐺)‘𝑍))))
109adantl 481 . 2 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑍) = (𝑌 𝑍) ↔ (𝑋(+g𝐺)((invg𝐺)‘𝑍)) = (𝑌(+g𝐺)((invg𝐺)‘𝑍))))
11 simpl 482 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝐺 ∈ Grp)
12 simpr1 1192 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋𝐵)
13 simpr2 1193 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌𝐵)
141, 3grpinvcl 18608 . . . 4 ((𝐺 ∈ Grp ∧ 𝑍𝐵) → ((invg𝐺)‘𝑍) ∈ 𝐵)
15143ad2antr3 1188 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((invg𝐺)‘𝑍) ∈ 𝐵)
161, 2grprcan 18594 . . 3 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵 ∧ ((invg𝐺)‘𝑍) ∈ 𝐵)) → ((𝑋(+g𝐺)((invg𝐺)‘𝑍)) = (𝑌(+g𝐺)((invg𝐺)‘𝑍)) ↔ 𝑋 = 𝑌))
1711, 12, 13, 15, 16syl13anc 1370 . 2 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋(+g𝐺)((invg𝐺)‘𝑍)) = (𝑌(+g𝐺)((invg𝐺)‘𝑍)) ↔ 𝑋 = 𝑌))
1810, 17bitrd 278 1 ((𝐺 ∈ Grp ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑍) = (𝑌 𝑍) ↔ 𝑋 = 𝑌))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 395  w3a 1085   = wceq 1541  wcel 2109  cfv 6430  (class class class)co 7268  Basecbs 16893  +gcplusg 16943  Grpcgrp 18558  invgcminusg 18559  -gcsg 18560
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1801  ax-4 1815  ax-5 1916  ax-6 1974  ax-7 2014  ax-8 2111  ax-9 2119  ax-10 2140  ax-11 2157  ax-12 2174  ax-ext 2710  ax-sep 5226  ax-nul 5233  ax-pow 5291  ax-pr 5355  ax-un 7579
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1544  df-fal 1554  df-ex 1786  df-nf 1790  df-sb 2071  df-mo 2541  df-eu 2570  df-clab 2717  df-cleq 2731  df-clel 2817  df-nfc 2890  df-ne 2945  df-ral 3070  df-rex 3071  df-reu 3072  df-rmo 3073  df-rab 3074  df-v 3432  df-sbc 3720  df-csb 3837  df-dif 3894  df-un 3896  df-in 3898  df-ss 3908  df-nul 4262  df-if 4465  df-pw 4540  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4845  df-iun 4931  df-br 5079  df-opab 5141  df-mpt 5162  df-id 5488  df-xp 5594  df-rel 5595  df-cnv 5596  df-co 5597  df-dm 5598  df-rn 5599  df-res 5600  df-ima 5601  df-iota 6388  df-fun 6432  df-fn 6433  df-f 6434  df-fv 6438  df-riota 7225  df-ov 7271  df-oprab 7272  df-mpo 7273  df-1st 7817  df-2nd 7818  df-0g 17133  df-mgm 18307  df-sgrp 18356  df-mnd 18367  df-grp 18561  df-minusg 18562  df-sbg 18563
This theorem is referenced by:  abladdsub4  19396  ogrpsublt  31326
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