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Theorem grppropstrg 13777
Description: Generalize a specific 2-element group 𝐿 to show that any set 𝐾 with the same (relevant) properties is also a group. (Contributed by NM, 28-Oct-2012.) (Revised by Mario Carneiro, 6-Jan-2015.)
Hypotheses
Ref Expression
grppropstr.b (Base‘𝐾) = 𝐵
grppropstr.p (+g𝐾) = +
grppropstr.l 𝐿 = {⟨(Base‘ndx), 𝐵⟩, ⟨(+g‘ndx), + ⟩}
Assertion
Ref Expression
grppropstrg (𝐾𝑉 → (𝐾 ∈ Grp ↔ 𝐿 ∈ Grp))

Proof of Theorem grppropstrg
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 grppropstr.b . . . . 5 (Base‘𝐾) = 𝐵
2 basfn 13358 . . . . . 6 Base Fn V
3 elex 2827 . . . . . 6 (𝐾𝑉𝐾 ∈ V)
4 funfvex 5692 . . . . . . 7 ((Fun Base ∧ 𝐾 ∈ dom Base) → (Base‘𝐾) ∈ V)
54funfni 5463 . . . . . 6 ((Base Fn V ∧ 𝐾 ∈ V) → (Base‘𝐾) ∈ V)
62, 3, 5sylancr 414 . . . . 5 (𝐾𝑉 → (Base‘𝐾) ∈ V)
71, 6eqeltrrid 2322 . . . 4 (𝐾𝑉𝐵 ∈ V)
8 grppropstr.p . . . . 5 (+g𝐾) = +
9 plusgslid 13412 . . . . . 6 (+g = Slot (+g‘ndx) ∧ (+g‘ndx) ∈ ℕ)
109slotex 13326 . . . . 5 (𝐾𝑉 → (+g𝐾) ∈ V)
118, 10eqeltrrid 2322 . . . 4 (𝐾𝑉+ ∈ V)
12 grppropstr.l . . . . 5 𝐿 = {⟨(Base‘ndx), 𝐵⟩, ⟨(+g‘ndx), + ⟩}
1312grpbaseg 13427 . . . 4 ((𝐵 ∈ V ∧ + ∈ V) → 𝐵 = (Base‘𝐿))
147, 11, 13syl2anc 411 . . 3 (𝐾𝑉𝐵 = (Base‘𝐿))
151, 14eqtrid 2279 . . 3 (𝐾𝑉 → (Base‘𝐾) = (Base‘𝐿))
1614, 15eqtr4d 2270 . 2 (𝐾𝑉𝐵 = (Base‘𝐾))
1712grpplusgg 13428 . . . . 5 ((𝐵 ∈ V ∧ + ∈ V) → + = (+g𝐿))
187, 11, 17syl2anc 411 . . . 4 (𝐾𝑉+ = (+g𝐿))
198, 18eqtrid 2279 . . 3 (𝐾𝑉 → (+g𝐾) = (+g𝐿))
2019oveqdr 6086 . 2 ((𝐾𝑉 ∧ (𝑥𝐵𝑦𝐵)) → (𝑥(+g𝐾)𝑦) = (𝑥(+g𝐿)𝑦))
2116, 14, 20grppropd 13775 1 (𝐾𝑉 → (𝐾 ∈ Grp ↔ 𝐿 ∈ Grp))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105   = wceq 1398  wcel 2205  Vcvv 2815  {cpr 3695  cop 3697   Fn wfn 5352  cfv 5357  ndxcnx 13296  Basecbs 13299  +gcplusg 13377  Grpcgrp 13758
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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-sep 4233  ax-pow 4292  ax-pr 4327  ax-un 4559  ax-setind 4664  ax-cnex 8234  ax-resscn 8235  ax-1cn 8236  ax-1re 8237  ax-icn 8238  ax-addcl 8239  ax-addrcl 8240  ax-mulcl 8241  ax-addcom 8243  ax-addass 8245  ax-i2m1 8248  ax-0lt1 8249  ax-0id 8251  ax-rnegex 8252  ax-pre-ltirr 8255  ax-pre-ltadd 8259
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-rab 2531  df-v 2817  df-sbc 3046  df-csb 3142  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-int 3955  df-br 4115  df-opab 4177  df-mpt 4178  df-id 4419  df-xp 4760  df-rel 4761  df-cnv 4762  df-co 4763  df-dm 4764  df-rn 4765  df-res 4766  df-iota 5317  df-fun 5359  df-fn 5360  df-fv 5365  df-riota 6011  df-ov 6061  df-pnf 8326  df-mnf 8327  df-ltxr 8329  df-inn 9258  df-2 9316  df-ndx 13302  df-slot 13303  df-base 13305  df-plusg 13390  df-0g 13558  df-mgm 13622  df-sgrp 13668  df-mnd 13681  df-grp 13761
This theorem is referenced by:  ring1  14305
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