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Theorem resseqnbas 17452
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 = (𝑊 ↾s 𝐴)
resseqnbas.e 𝐶 = (𝐸‘𝑊)
resseqnbas.f 𝐸 = Slot (𝐸‘ndx)
resseqnbas.n (𝐸‘ndx) ≠ (Base‘ndx)
Assertion
Ref Expression
resseqnbas (𝐴 ∈ 𝑉 → 𝐶 = (𝐸‘𝑅))

Proof of Theorem resseqnbas
StepHypRef Expression
1 resseqnbas.e . 2 𝐶 = (𝐸‘𝑊)
2 resseqnbas.r . . . . . . 7 𝑅 = (𝑊 ↾s 𝐴)
3 eqid 2763 . . . . . . 7 (Base‘𝑊) = (Base‘𝑊)
42, 3ressid2 17444 . . . . . 6 (((Base‘𝑊) ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝑅 = 𝑊)
54fveq2d 6915 . . . . 5 (((Base‘𝑊) ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐸‘𝑅) = (𝐸‘𝑊))
653expib 1140 . . . 4 ((Base‘𝑊) ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐸‘𝑅) = (𝐸‘𝑊)))
72, 3ressval2 17445 . . . . . . 7 ((¬ (Base‘𝑊) ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝑅 = (𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
87fveq2d 6915 . . . . . 6 ((¬ (Base‘𝑊) ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐸‘𝑅) = (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 17418 . . . . . 6 (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑊))⟩))
128, 11eqtr4di 2816 . . . . 5 ((¬ (Base‘𝑊) ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐸‘𝑅) = (𝐸‘𝑊))
13123expib 1140 . . . 4 (¬ (Base‘𝑊) ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐸‘𝑅) = (𝐸‘𝑊)))
146, 13pm2.61i 184 . . 3 ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐸‘𝑅) = (𝐸‘𝑊))
159str0 17399 . . . . . . 7 ∅ = (𝐸‘∅)
1615eqcomi 2772 . . . . . 6 (𝐸‘∅) = ∅
17 reldmress 17442 . . . . . 6 Rel dom ↾s
1816, 2, 17oveqprc 17402 . . . . 5 (¬ 𝑊 ∈ V → (𝐸‘𝑊) = (𝐸‘𝑅))
1918eqcomd 2769 . . . 4 (¬ 𝑊 ∈ V → (𝐸‘𝑅) = (𝐸‘𝑊))
2019adantr 486 . . 3 ((¬ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐸‘𝑅) = (𝐸‘𝑊))
2114, 20pm2.61ian 824 . 2 (𝐴 ∈ 𝑉 → (𝐸‘𝑅) = (𝐸‘𝑊))
221, 21eqtr4id 2817 1 (𝐴 ∈ 𝑉 → 𝐶 = (𝐸‘𝑅))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   → wi 4   ∧ wa 401   ∧ w3a 1103   = wceq 1570   ∈ wcel 2147   ≠ wne 2959  Vcvv 3454   ⊆ wss 3900   ∩ cin 4092  ∅c0 4281  ⟨cop 4838  ‘cfv 6561  (class class class)co 7446   sSet csts 17373  Slot cslot 17391  ndxcnx 17403  Basecbs 17419   ↾s cress 17440
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-sep 5253  ax-nul 5264  ax-pr 5396  ax-un 7778
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-sbc 3743  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-br 5107  df-opab 5172  df-mpt 5191  df-id 5551  df-xp 5662  df-rel 5663  df-cnv 5664  df-co 5665  df-dm 5666  df-res 5668  df-iota 6515  df-fun 6563  df-fv 6569  df-ov 7449  df-oprab 7450  df-mpo 7451  df-sets 17374  df-slot 17392  df-ress 17441
This theorem is used by:  ressplusg  17494  ressmulr  17510  ressstarv  17511  resssca  17546  ressvsca  17547  ressip  17548  resstset  17568  ressle  17583  ressunif  17605  ressds  17613  resshom  17621  ressco  17622
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