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Theorem ressbasd 13423
Description: Base set of a structure restriction. (Contributed by Stefan O'Rear, 26-Nov-2014.) (Proof shortened by AV, 7-Nov-2024.)
Hypotheses
Ref Expression
ressbasd.r (𝜑𝑅 = (𝑊s 𝐴))
ressbasd.b (𝜑𝐵 = (Base‘𝑊))
ressbasd.w (𝜑𝑊𝑋)
ressbasd.a (𝜑𝐴𝑉)
Assertion
Ref Expression
ressbasd (𝜑 → (𝐴𝐵) = (Base‘𝑅))

Proof of Theorem ressbasd
StepHypRef Expression
1 ressbasd.w . . 3 (𝜑𝑊𝑋)
2 ressbasd.a . . . 4 (𝜑𝐴𝑉)
3 inex1g 4269 . . . 4 (𝐴𝑉 → (𝐴 ∩ (Base‘𝑊)) ∈ V)
42, 3syl 14 . . 3 (𝜑 → (𝐴 ∩ (Base‘𝑊)) ∈ V)
5 baseslid 13412 . . . 4 (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ)
65setsslid 13405 . . 3 ((𝑊𝑋 ∧ (𝐴 ∩ (Base‘𝑊)) ∈ V) → (𝐴 ∩ (Base‘𝑊)) = (Base‘(𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩)))
71, 4, 6syl2anc 415 . 2 (𝜑 → (𝐴 ∩ (Base‘𝑊)) = (Base‘(𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩)))
8 ressbasd.b . . 3 (𝜑𝐵 = (Base‘𝑊))
98ineq2d 3432 . 2 (𝜑 → (𝐴𝐵) = (𝐴 ∩ (Base‘𝑊)))
10 ressbasd.r . . . 4 (𝜑𝑅 = (𝑊s 𝐴))
11 ressvalsets 13420 . . . . 5 ((𝑊𝑋𝐴𝑉) → (𝑊s 𝐴) = (𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
121, 2, 11syl2anc 415 . . . 4 (𝜑 → (𝑊s 𝐴) = (𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
1310, 12eqtrd 2271 . . 3 (𝜑𝑅 = (𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
1413fveq2d 5699 . 2 (𝜑 → (Base‘𝑅) = (Base‘(𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩)))
157, 9, 143eqtr4d 2281 1 (𝜑 → (𝐴𝐵) = (Base‘𝑅))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4   = wceq 1402  wcel 2209  Vcvv 2821  cin 3219  cop 3712  cfv 5377  (class class class)co 6085  ndxcnx 13351   sSet csts 13352  Basecbs 13354  s cress 13355
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-cnex 8270  ax-resscn 8271  ax-1re 8273  ax-addrcl 8276
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-iota 5337  df-fun 5379  df-fv 5385  df-ov 6088  df-oprab 6089  df-mpo 6090  df-inn 9306  df-ndx 13357  df-slot 13358  df-base 13360  df-sets 13361  df-iress 13362
This theorem is used by:  ressbas2d  13424  ressbasssd  13425  ressbasid  13426  ressressg  13431  grpressid  13868  opprsubgg  14392  subrngpropd  14526  subrgpropd  14563  sralmod  14789  lidlbas  14817
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