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Theorem oppgid 17609
Description: Zero in a monoid is a symmetric notion. (Contributed by Stefan O'Rear, 26-Aug-2015.) (Revised by Mario Carneiro, 16-Sep-2015.)
Hypotheses
Ref Expression
oppgbas.1 𝑂 = (oppg𝑅)
oppgid.2 0 = (0g𝑅)
Assertion
Ref Expression
oppgid 0 = (0g𝑂)

Proof of Theorem oppgid
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ancom 465 . . . . . 6 (((𝑥(+g𝑅)𝑦) = 𝑦 ∧ (𝑦(+g𝑅)𝑥) = 𝑦) ↔ ((𝑦(+g𝑅)𝑥) = 𝑦 ∧ (𝑥(+g𝑅)𝑦) = 𝑦))
2 eqid 2610 . . . . . . . . 9 (+g𝑅) = (+g𝑅)
3 oppgbas.1 . . . . . . . . 9 𝑂 = (oppg𝑅)
4 eqid 2610 . . . . . . . . 9 (+g𝑂) = (+g𝑂)
52, 3, 4oppgplus 17602 . . . . . . . 8 (𝑥(+g𝑂)𝑦) = (𝑦(+g𝑅)𝑥)
65eqeq1i 2615 . . . . . . 7 ((𝑥(+g𝑂)𝑦) = 𝑦 ↔ (𝑦(+g𝑅)𝑥) = 𝑦)
72, 3, 4oppgplus 17602 . . . . . . . 8 (𝑦(+g𝑂)𝑥) = (𝑥(+g𝑅)𝑦)
87eqeq1i 2615 . . . . . . 7 ((𝑦(+g𝑂)𝑥) = 𝑦 ↔ (𝑥(+g𝑅)𝑦) = 𝑦)
96, 8anbi12i 729 . . . . . 6 (((𝑥(+g𝑂)𝑦) = 𝑦 ∧ (𝑦(+g𝑂)𝑥) = 𝑦) ↔ ((𝑦(+g𝑅)𝑥) = 𝑦 ∧ (𝑥(+g𝑅)𝑦) = 𝑦))
101, 9bitr4i 266 . . . . 5 (((𝑥(+g𝑅)𝑦) = 𝑦 ∧ (𝑦(+g𝑅)𝑥) = 𝑦) ↔ ((𝑥(+g𝑂)𝑦) = 𝑦 ∧ (𝑦(+g𝑂)𝑥) = 𝑦))
1110ralbii 2963 . . . 4 (∀𝑦 ∈ (Base‘𝑅)((𝑥(+g𝑅)𝑦) = 𝑦 ∧ (𝑦(+g𝑅)𝑥) = 𝑦) ↔ ∀𝑦 ∈ (Base‘𝑅)((𝑥(+g𝑂)𝑦) = 𝑦 ∧ (𝑦(+g𝑂)𝑥) = 𝑦))
1211anbi2i 726 . . 3 ((𝑥 ∈ (Base‘𝑅) ∧ ∀𝑦 ∈ (Base‘𝑅)((𝑥(+g𝑅)𝑦) = 𝑦 ∧ (𝑦(+g𝑅)𝑥) = 𝑦)) ↔ (𝑥 ∈ (Base‘𝑅) ∧ ∀𝑦 ∈ (Base‘𝑅)((𝑥(+g𝑂)𝑦) = 𝑦 ∧ (𝑦(+g𝑂)𝑥) = 𝑦)))
1312iotabii 5790 . 2 (℩𝑥(𝑥 ∈ (Base‘𝑅) ∧ ∀𝑦 ∈ (Base‘𝑅)((𝑥(+g𝑅)𝑦) = 𝑦 ∧ (𝑦(+g𝑅)𝑥) = 𝑦))) = (℩𝑥(𝑥 ∈ (Base‘𝑅) ∧ ∀𝑦 ∈ (Base‘𝑅)((𝑥(+g𝑂)𝑦) = 𝑦 ∧ (𝑦(+g𝑂)𝑥) = 𝑦)))
14 eqid 2610 . . 3 (Base‘𝑅) = (Base‘𝑅)
15 oppgid.2 . . 3 0 = (0g𝑅)
1614, 2, 15grpidval 17083 . 2 0 = (℩𝑥(𝑥 ∈ (Base‘𝑅) ∧ ∀𝑦 ∈ (Base‘𝑅)((𝑥(+g𝑅)𝑦) = 𝑦 ∧ (𝑦(+g𝑅)𝑥) = 𝑦)))
173, 14oppgbas 17604 . . 3 (Base‘𝑅) = (Base‘𝑂)
18 eqid 2610 . . 3 (0g𝑂) = (0g𝑂)
1917, 4, 18grpidval 17083 . 2 (0g𝑂) = (℩𝑥(𝑥 ∈ (Base‘𝑅) ∧ ∀𝑦 ∈ (Base‘𝑅)((𝑥(+g𝑂)𝑦) = 𝑦 ∧ (𝑦(+g𝑂)𝑥) = 𝑦)))
2013, 16, 193eqtr4i 2642 1 0 = (0g𝑂)
Colors of variables: wff setvar class
Syntax hints:  wa 383   = wceq 1475  wcel 1977  wral 2896  cio 5766  cfv 5804  (class class class)co 6549  Basecbs 15695  +gcplusg 15768  0gc0g 15923  oppgcoppg 17598
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892
This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-tpos 7239  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-ndx 15698  df-slot 15699  df-base 15700  df-sets 15701  df-plusg 15781  df-0g 15925  df-oppg 17599
This theorem is referenced by:  oppggrp  17610  oppginv  17612  oppgsubm  17615  gsumwrev  17619  lsmdisj2r  17921  gsumzoppg  18167  tgpconcomp  21726
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