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Theorem grpsubadd0sub 12813
Description: Subtraction expressed as addition of the difference of the identity element and the subtrahend. (Contributed by AV, 9-Nov-2019.)
Hypotheses
Ref Expression
grpsubid.b 𝐵 = (Base‘𝐺)
grpsubid.o 0 = (0g𝐺)
grpsubid.m = (-g𝐺)
grpsubadd0sub.p + = (+g𝐺)
Assertion
Ref Expression
grpsubadd0sub ((𝐺 ∈ Grp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) = (𝑋 + ( 0 𝑌)))

Proof of Theorem grpsubadd0sub
StepHypRef Expression
1 grpsubid.b . . . 4 𝐵 = (Base‘𝐺)
2 grpsubadd0sub.p . . . 4 + = (+g𝐺)
3 eqid 2173 . . . 4 (invg𝐺) = (invg𝐺)
4 grpsubid.m . . . 4 = (-g𝐺)
51, 2, 3, 4grpsubval 12776 . . 3 ((𝑋𝐵𝑌𝐵) → (𝑋 𝑌) = (𝑋 + ((invg𝐺)‘𝑌)))
653adant1 1013 . 2 ((𝐺 ∈ Grp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) = (𝑋 + ((invg𝐺)‘𝑌)))
7 grpsubid.o . . . . 5 0 = (0g𝐺)
81, 4, 3, 7grpinvval2 12809 . . . 4 ((𝐺 ∈ Grp ∧ 𝑌𝐵) → ((invg𝐺)‘𝑌) = ( 0 𝑌))
983adant2 1014 . . 3 ((𝐺 ∈ Grp ∧ 𝑋𝐵𝑌𝐵) → ((invg𝐺)‘𝑌) = ( 0 𝑌))
109oveq2d 5878 . 2 ((𝐺 ∈ Grp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 + ((invg𝐺)‘𝑌)) = (𝑋 + ( 0 𝑌)))
116, 10eqtrd 2206 1 ((𝐺 ∈ Grp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) = (𝑋 + ( 0 𝑌)))
Colors of variables: wff set class
Syntax hints:  wi 4  w3a 976   = wceq 1351  wcel 2144  cfv 5205  (class class class)co 5862  Basecbs 12425  +gcplusg 12489  0gc0g 12623  Grpcgrp 12735  invgcminusg 12736  -gcsg 12737
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 612  ax-in2 613  ax-io 707  ax-5 1443  ax-7 1444  ax-gen 1445  ax-ie1 1489  ax-ie2 1490  ax-8 1500  ax-10 1501  ax-11 1502  ax-i12 1503  ax-bndl 1505  ax-4 1506  ax-17 1522  ax-i9 1526  ax-ial 1530  ax-i5r 1531  ax-13 2146  ax-14 2147  ax-ext 2155  ax-coll 4110  ax-sep 4113  ax-pow 4166  ax-pr 4200  ax-un 4424  ax-setind 4527  ax-cnex 7874  ax-resscn 7875  ax-1re 7877  ax-addrcl 7880
This theorem depends on definitions:  df-bi 117  df-3an 978  df-tru 1354  df-fal 1357  df-nf 1457  df-sb 1759  df-eu 2025  df-mo 2026  df-clab 2160  df-cleq 2166  df-clel 2169  df-nfc 2304  df-ne 2344  df-ral 2456  df-rex 2457  df-reu 2458  df-rmo 2459  df-rab 2460  df-v 2735  df-sbc 2959  df-csb 3053  df-dif 3126  df-un 3128  df-in 3130  df-ss 3137  df-pw 3571  df-sn 3592  df-pr 3593  df-op 3595  df-uni 3803  df-int 3838  df-iun 3881  df-br 3996  df-opab 4057  df-mpt 4058  df-id 4284  df-xp 4623  df-rel 4624  df-cnv 4625  df-co 4626  df-dm 4627  df-rn 4628  df-res 4629  df-ima 4630  df-iota 5167  df-fun 5207  df-fn 5208  df-f 5209  df-f1 5210  df-fo 5211  df-f1o 5212  df-fv 5213  df-riota 5818  df-ov 5865  df-oprab 5866  df-mpo 5867  df-1st 6128  df-2nd 6129  df-inn 8888  df-2 8946  df-ndx 12428  df-slot 12429  df-base 12431  df-plusg 12502  df-0g 12625  df-mgm 12637  df-sgrp 12670  df-mnd 12680  df-grp 12738  df-minusg 12739  df-sbg 12740
This theorem is referenced by: (None)
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