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Theorem resseqnbas 17219
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 2730 . . . . . . 7 (Base‘𝑊) = (Base‘𝑊)
42, 3ressid2 17211 . . . . . 6 (((Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → 𝑅 = 𝑊)
54fveq2d 6865 . . . . 5 (((Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
653expib 1122 . . . 4 ((Base‘𝑊) ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊)))
72, 3ressval2 17212 . . . . . . 7 ((¬ (Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → 𝑅 = (𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
87fveq2d 6865 . . . . . 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 17185 . . . . . 6 (𝐸𝑊) = (𝐸‘(𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
128, 11eqtr4di 2783 . . . . 5 ((¬ (Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
13123expib 1122 . . . 4 (¬ (Base‘𝑊) ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊)))
146, 13pm2.61i 182 . . 3 ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
159str0 17166 . . . . . . 7 ∅ = (𝐸‘∅)
1615eqcomi 2739 . . . . . 6 (𝐸‘∅) = ∅
17 reldmress 17209 . . . . . 6 Rel dom ↾s
1816, 2, 17oveqprc 17169 . . . . 5 𝑊 ∈ V → (𝐸𝑊) = (𝐸𝑅))
1918eqcomd 2736 . . . 4 𝑊 ∈ V → (𝐸𝑅) = (𝐸𝑊))
2019adantr 480 . . 3 ((¬ 𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
2114, 20pm2.61ian 811 . 2 (𝐴𝑉 → (𝐸𝑅) = (𝐸𝑊))
221, 21eqtr4id 2784 1 (𝐴𝑉𝐶 = (𝐸𝑅))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 395  w3a 1086   = wceq 1540  wcel 2109  wne 2926  Vcvv 3450  cin 3916  wss 3917  c0 4299  cop 4598  cfv 6514  (class class class)co 7390   sSet csts 17140  Slot cslot 17158  ndxcnx 17170  Basecbs 17186  s cress 17207
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2702  ax-sep 5254  ax-nul 5264  ax-pr 5390  ax-un 7714
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2534  df-eu 2563  df-clab 2709  df-cleq 2722  df-clel 2804  df-nfc 2879  df-ne 2927  df-ral 3046  df-rex 3055  df-rab 3409  df-v 3452  df-sbc 3757  df-dif 3920  df-un 3922  df-in 3924  df-ss 3934  df-nul 4300  df-if 4492  df-sn 4593  df-pr 4595  df-op 4599  df-uni 4875  df-br 5111  df-opab 5173  df-mpt 5192  df-id 5536  df-xp 5647  df-rel 5648  df-cnv 5649  df-co 5650  df-dm 5651  df-res 5653  df-iota 6467  df-fun 6516  df-fv 6522  df-ov 7393  df-oprab 7394  df-mpo 7395  df-sets 17141  df-slot 17159  df-ress 17208
This theorem is referenced by:  ressplusg  17261  ressmulr  17277  ressstarv  17278  resssca  17313  ressvsca  17314  ressip  17315  resstset  17335  ressle  17350  ressunif  17372  ressds  17380  resshom  17388  ressco  17389
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