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Theorem resseqnbas 17287
Description: The components of an extensible structure except the base set remain unchanged on a structure restriction. (Contributed by Mario Carneiro, 26-Nov-2014.) (Revised by Mario Carneiro, 2-Dec-2014.) (Revised by AV, 19-Oct-2024.)
Hypotheses
Ref Expression
resseqnbas.r 𝑅 = (𝑊s 𝐴)
resseqnbas.e 𝐶 = (𝐸𝑊)
resseqnbas.f 𝐸 = Slot (𝐸‘ndx)
resseqnbas.n (𝐸‘ndx) ≠ (Base‘ndx)
Assertion
Ref Expression
resseqnbas (𝐴𝑉𝐶 = (𝐸𝑅))

Proof of Theorem resseqnbas
StepHypRef Expression
1 resseqnbas.e . 2 𝐶 = (𝐸𝑊)
2 resseqnbas.r . . . . . . 7 𝑅 = (𝑊s 𝐴)
3 eqid 2735 . . . . . . 7 (Base‘𝑊) = (Base‘𝑊)
42, 3ressid2 17278 . . . . . 6 (((Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → 𝑅 = 𝑊)
54fveq2d 6911 . . . . 5 (((Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
653expib 1121 . . . 4 ((Base‘𝑊) ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊)))
72, 3ressval2 17279 . . . . . . 7 ((¬ (Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → 𝑅 = (𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
87fveq2d 6911 . . . . . 6 ((¬ (Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸‘(𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩)))
9 resseqnbas.f . . . . . . 7 𝐸 = Slot (𝐸‘ndx)
10 resseqnbas.n . . . . . . 7 (𝐸‘ndx) ≠ (Base‘ndx)
119, 10setsnid 17243 . . . . . 6 (𝐸𝑊) = (𝐸‘(𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
128, 11eqtr4di 2793 . . . . 5 ((¬ (Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
13123expib 1121 . . . 4 (¬ (Base‘𝑊) ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊)))
146, 13pm2.61i 182 . . 3 ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
159str0 17223 . . . . . . 7 ∅ = (𝐸‘∅)
1615eqcomi 2744 . . . . . 6 (𝐸‘∅) = ∅
17 reldmress 17276 . . . . . 6 Rel dom ↾s
1816, 2, 17oveqprc 17226 . . . . 5 𝑊 ∈ V → (𝐸𝑊) = (𝐸𝑅))
1918eqcomd 2741 . . . 4 𝑊 ∈ V → (𝐸𝑅) = (𝐸𝑊))
2019adantr 480 . . 3 ((¬ 𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
2114, 20pm2.61ian 812 . 2 (𝐴𝑉 → (𝐸𝑅) = (𝐸𝑊))
221, 21eqtr4id 2794 1 (𝐴𝑉𝐶 = (𝐸𝑅))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 395  w3a 1086   = wceq 1537  wcel 2106  wne 2938  Vcvv 3478  cin 3962  wss 3963  c0 4339  cop 4637  cfv 6563  (class class class)co 7431   sSet csts 17197  Slot cslot 17215  ndxcnx 17227  Basecbs 17245  s cress 17274
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-11 2155  ax-12 2175  ax-ext 2706  ax-sep 5302  ax-nul 5312  ax-pr 5438  ax-un 7754
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2727  df-clel 2814  df-nfc 2890  df-ne 2939  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-sbc 3792  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4532  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5583  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-res 5701  df-iota 6516  df-fun 6565  df-fv 6571  df-ov 7434  df-oprab 7435  df-mpo 7436  df-sets 17198  df-slot 17216  df-ress 17275
This theorem is referenced by:  ressplusg  17336  ressmulr  17353  ressstarv  17354  resssca  17389  ressvsca  17390  ressip  17391  resstset  17411  ressle  17426  ressunif  17448  ressds  17456  resshom  17465  ressco  17466
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