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Theorem grpidpropd 17383
Description: If two structures have the same base set, and the values of their group (addition) operations are equal for all pairs of elements of the base set, they have the same identity element. (Contributed by Mario Carneiro, 27-Nov-2014.)
Hypotheses
Ref Expression
grpidpropd.1 (𝜑𝐵 = (Base‘𝐾))
grpidpropd.2 (𝜑𝐵 = (Base‘𝐿))
grpidpropd.3 ((𝜑 ∧ (𝑥𝐵𝑦𝐵)) → (𝑥(+g𝐾)𝑦) = (𝑥(+g𝐿)𝑦))
Assertion
Ref Expression
grpidpropd (𝜑 → (0g𝐾) = (0g𝐿))
Distinct variable groups:   𝑥,𝑦,𝐵   𝑥,𝐾,𝑦   𝜑,𝑥,𝑦   𝑥,𝐿,𝑦

Proof of Theorem grpidpropd
Dummy variables 𝑤 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 grpidpropd.3 . . . . . . . . 9 ((𝜑 ∧ (𝑥𝐵𝑦𝐵)) → (𝑥(+g𝐾)𝑦) = (𝑥(+g𝐿)𝑦))
21eqeq1d 2726 . . . . . . . 8 ((𝜑 ∧ (𝑥𝐵𝑦𝐵)) → ((𝑥(+g𝐾)𝑦) = 𝑦 ↔ (𝑥(+g𝐿)𝑦) = 𝑦))
31oveqrspc2v 6788 . . . . . . . . . . 11 ((𝜑 ∧ (𝑧𝐵𝑤𝐵)) → (𝑧(+g𝐾)𝑤) = (𝑧(+g𝐿)𝑤))
43oveqrspc2v 6788 . . . . . . . . . 10 ((𝜑 ∧ (𝑦𝐵𝑥𝐵)) → (𝑦(+g𝐾)𝑥) = (𝑦(+g𝐿)𝑥))
54ancom2s 879 . . . . . . . . 9 ((𝜑 ∧ (𝑥𝐵𝑦𝐵)) → (𝑦(+g𝐾)𝑥) = (𝑦(+g𝐿)𝑥))
65eqeq1d 2726 . . . . . . . 8 ((𝜑 ∧ (𝑥𝐵𝑦𝐵)) → ((𝑦(+g𝐾)𝑥) = 𝑦 ↔ (𝑦(+g𝐿)𝑥) = 𝑦))
72, 6anbi12d 749 . . . . . . 7 ((𝜑 ∧ (𝑥𝐵𝑦𝐵)) → (((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦) ↔ ((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦)))
87anassrs 683 . . . . . 6 (((𝜑𝑥𝐵) ∧ 𝑦𝐵) → (((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦) ↔ ((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦)))
98ralbidva 3087 . . . . 5 ((𝜑𝑥𝐵) → (∀𝑦𝐵 ((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦) ↔ ∀𝑦𝐵 ((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦)))
109pm5.32da 676 . . . 4 (𝜑 → ((𝑥𝐵 ∧ ∀𝑦𝐵 ((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦)) ↔ (𝑥𝐵 ∧ ∀𝑦𝐵 ((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦))))
11 grpidpropd.1 . . . . . 6 (𝜑𝐵 = (Base‘𝐾))
1211eleq2d 2789 . . . . 5 (𝜑 → (𝑥𝐵𝑥 ∈ (Base‘𝐾)))
1311raleqdv 3247 . . . . 5 (𝜑 → (∀𝑦𝐵 ((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦) ↔ ∀𝑦 ∈ (Base‘𝐾)((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦)))
1412, 13anbi12d 749 . . . 4 (𝜑 → ((𝑥𝐵 ∧ ∀𝑦𝐵 ((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦)) ↔ (𝑥 ∈ (Base‘𝐾) ∧ ∀𝑦 ∈ (Base‘𝐾)((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦))))
15 grpidpropd.2 . . . . . 6 (𝜑𝐵 = (Base‘𝐿))
1615eleq2d 2789 . . . . 5 (𝜑 → (𝑥𝐵𝑥 ∈ (Base‘𝐿)))
1715raleqdv 3247 . . . . 5 (𝜑 → (∀𝑦𝐵 ((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦) ↔ ∀𝑦 ∈ (Base‘𝐿)((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦)))
1816, 17anbi12d 749 . . . 4 (𝜑 → ((𝑥𝐵 ∧ ∀𝑦𝐵 ((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦)) ↔ (𝑥 ∈ (Base‘𝐿) ∧ ∀𝑦 ∈ (Base‘𝐿)((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦))))
1910, 14, 183bitr3d 298 . . 3 (𝜑 → ((𝑥 ∈ (Base‘𝐾) ∧ ∀𝑦 ∈ (Base‘𝐾)((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦)) ↔ (𝑥 ∈ (Base‘𝐿) ∧ ∀𝑦 ∈ (Base‘𝐿)((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦))))
2019iotabidv 5985 . 2 (𝜑 → (℩𝑥(𝑥 ∈ (Base‘𝐾) ∧ ∀𝑦 ∈ (Base‘𝐾)((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦))) = (℩𝑥(𝑥 ∈ (Base‘𝐿) ∧ ∀𝑦 ∈ (Base‘𝐿)((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦))))
21 eqid 2724 . . 3 (Base‘𝐾) = (Base‘𝐾)
22 eqid 2724 . . 3 (+g𝐾) = (+g𝐾)
23 eqid 2724 . . 3 (0g𝐾) = (0g𝐾)
2421, 22, 23grpidval 17382 . 2 (0g𝐾) = (℩𝑥(𝑥 ∈ (Base‘𝐾) ∧ ∀𝑦 ∈ (Base‘𝐾)((𝑥(+g𝐾)𝑦) = 𝑦 ∧ (𝑦(+g𝐾)𝑥) = 𝑦)))
25 eqid 2724 . . 3 (Base‘𝐿) = (Base‘𝐿)
26 eqid 2724 . . 3 (+g𝐿) = (+g𝐿)
27 eqid 2724 . . 3 (0g𝐿) = (0g𝐿)
2825, 26, 27grpidval 17382 . 2 (0g𝐿) = (℩𝑥(𝑥 ∈ (Base‘𝐿) ∧ ∀𝑦 ∈ (Base‘𝐿)((𝑥(+g𝐿)𝑦) = 𝑦 ∧ (𝑦(+g𝐿)𝑥) = 𝑦)))
2920, 24, 283eqtr4g 2783 1 (𝜑 → (0g𝐾) = (0g𝐿))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383   = wceq 1596  wcel 2103  wral 3014  cio 5962  cfv 6001  (class class class)co 6765  Basecbs 15980  +gcplusg 16064  0gc0g 16223
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1835  ax-4 1850  ax-5 1952  ax-6 2018  ax-7 2054  ax-8 2105  ax-9 2112  ax-10 2132  ax-11 2147  ax-12 2160  ax-13 2355  ax-ext 2704  ax-sep 4889  ax-nul 4897  ax-pow 4948  ax-pr 5011
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1599  df-ex 1818  df-nf 1823  df-sb 2011  df-eu 2575  df-mo 2576  df-clab 2711  df-cleq 2717  df-clel 2720  df-nfc 2855  df-ral 3019  df-rex 3020  df-rab 3023  df-v 3306  df-sbc 3542  df-dif 3683  df-un 3685  df-in 3687  df-ss 3694  df-nul 4024  df-if 4195  df-sn 4286  df-pr 4288  df-op 4292  df-uni 4545  df-br 4761  df-opab 4821  df-mpt 4838  df-id 5128  df-xp 5224  df-rel 5225  df-cnv 5226  df-co 5227  df-dm 5228  df-iota 5964  df-fun 6003  df-fv 6009  df-ov 6768  df-0g 16225
This theorem is referenced by:  gsumpropd  17394  gsumpropd2lem  17395  mhmpropd  17463  grppropd  17559  grpinvpropd  17612  mulgpropd  17706  prds1  18735  rngidpropd  18816  drngprop  18881  drngpropd  18897  abvpropd  18965  lbspropd  19222  sralmod0  19311  opsr0  19711  mplbaspropd  19730  ply1mpl0  19748  phlpropd  20123  mat0  20346  nmpropd  22520  nmpropd2  22521  tng0  22569  mdegpropd  23964  ply1divalg2  24018  resv0g  30066  zlm0  30236  hlhils0  37656  hlhil0  37666
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