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Theorem resseqnbas 17212
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 2736 . . . . . . 7 (Base‘𝑊) = (Base‘𝑊)
42, 3ressid2 17204 . . . . . 6 (((Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → 𝑅 = 𝑊)
54fveq2d 6844 . . . . 5 (((Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
653expib 1123 . . . 4 ((Base‘𝑊) ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊)))
72, 3ressval2 17205 . . . . . . 7 ((¬ (Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → 𝑅 = (𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
87fveq2d 6844 . . . . . 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 17178 . . . . . 6 (𝐸𝑊) = (𝐸‘(𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
128, 11eqtr4di 2789 . . . . 5 ((¬ (Base‘𝑊) ⊆ 𝐴𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
13123expib 1123 . . . 4 (¬ (Base‘𝑊) ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊)))
146, 13pm2.61i 182 . . 3 ((𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
159str0 17159 . . . . . . 7 ∅ = (𝐸‘∅)
1615eqcomi 2745 . . . . . 6 (𝐸‘∅) = ∅
17 reldmress 17202 . . . . . 6 Rel dom ↾s
1816, 2, 17oveqprc 17162 . . . . 5 𝑊 ∈ V → (𝐸𝑊) = (𝐸𝑅))
1918eqcomd 2742 . . . 4 𝑊 ∈ V → (𝐸𝑅) = (𝐸𝑊))
2019adantr 480 . . 3 ((¬ 𝑊 ∈ V ∧ 𝐴𝑉) → (𝐸𝑅) = (𝐸𝑊))
2114, 20pm2.61ian 812 . 2 (𝐴𝑉 → (𝐸𝑅) = (𝐸𝑊))
221, 21eqtr4id 2790 1 (𝐴𝑉𝐶 = (𝐸𝑅))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 395  w3a 1087   = wceq 1542  wcel 2114  wne 2932  Vcvv 3429  cin 3888  wss 3889  c0 4273  cop 4573  cfv 6498  (class class class)co 7367   sSet csts 17133  Slot cslot 17151  ndxcnx 17163  Basecbs 17179  s cress 17200
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-sep 5231  ax-nul 5241  ax-pr 5375  ax-un 7689
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3062  df-rab 3390  df-v 3431  df-sbc 3729  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-nul 4274  df-if 4467  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-br 5086  df-opab 5148  df-mpt 5167  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-res 5643  df-iota 6454  df-fun 6500  df-fv 6506  df-ov 7370  df-oprab 7371  df-mpo 7372  df-sets 17134  df-slot 17152  df-ress 17201
This theorem is referenced by:  ressplusg  17254  ressmulr  17270  ressstarv  17271  resssca  17306  ressvsca  17307  ressip  17308  resstset  17328  ressle  17343  ressunif  17365  ressds  17373  resshom  17381  ressco  17382
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