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Theorem csbopabgALT 5514
Description: Move substitution into a class abstraction. Version of csbopab 5513 with a sethood antecedent but depending on fewer axioms. (Contributed by NM, 6-Aug-2007.) (Proof shortened by Mario Carneiro, 17-Nov-2016.) (New usage is discouraged.) (Proof modification is discouraged.)
Assertion
Ref Expression
csbopabgALT (𝐴𝑉𝐴 / 𝑥{⟨𝑦, 𝑧⟩ ∣ 𝜑} = {⟨𝑦, 𝑧⟩ ∣ [𝐴 / 𝑥]𝜑})
Distinct variable groups:   𝑦,𝑧,𝐴   𝑥,𝑦,𝑧
Allowed substitution hints:   𝜑(𝑥,𝑦,𝑧)   𝐴(𝑥)   𝑉(𝑥,𝑦,𝑧)

Proof of Theorem csbopabgALT
Dummy variable 𝑤 is distinct from all other variables.
StepHypRef Expression
1 csbeq1 3859 . . 3 (𝑤 = 𝐴𝑤 / 𝑥{⟨𝑦, 𝑧⟩ ∣ 𝜑} = 𝐴 / 𝑥{⟨𝑦, 𝑧⟩ ∣ 𝜑})
2 dfsbcq2 3743 . . . 4 (𝑤 = 𝐴 → ([𝑤 / 𝑥]𝜑[𝐴 / 𝑥]𝜑))
32opabbidv 5172 . . 3 (𝑤 = 𝐴 → {⟨𝑦, 𝑧⟩ ∣ [𝑤 / 𝑥]𝜑} = {⟨𝑦, 𝑧⟩ ∣ [𝐴 / 𝑥]𝜑})
41, 3eqeq12d 2753 . 2 (𝑤 = 𝐴 → (𝑤 / 𝑥{⟨𝑦, 𝑧⟩ ∣ 𝜑} = {⟨𝑦, 𝑧⟩ ∣ [𝑤 / 𝑥]𝜑} ↔ 𝐴 / 𝑥{⟨𝑦, 𝑧⟩ ∣ 𝜑} = {⟨𝑦, 𝑧⟩ ∣ [𝐴 / 𝑥]𝜑}))
5 vex 3450 . . 3 𝑤 ∈ V
6 nfs1v 2154 . . . 4 𝑥[𝑤 / 𝑥]𝜑
76nfopab 5175 . . 3 𝑥{⟨𝑦, 𝑧⟩ ∣ [𝑤 / 𝑥]𝜑}
8 sbequ12 2244 . . . 4 (𝑥 = 𝑤 → (𝜑 ↔ [𝑤 / 𝑥]𝜑))
98opabbidv 5172 . . 3 (𝑥 = 𝑤 → {⟨𝑦, 𝑧⟩ ∣ 𝜑} = {⟨𝑦, 𝑧⟩ ∣ [𝑤 / 𝑥]𝜑})
105, 7, 9csbief 3891 . 2 𝑤 / 𝑥{⟨𝑦, 𝑧⟩ ∣ 𝜑} = {⟨𝑦, 𝑧⟩ ∣ [𝑤 / 𝑥]𝜑}
114, 10vtoclg 3526 1 (𝐴𝑉𝐴 / 𝑥{⟨𝑦, 𝑧⟩ ∣ 𝜑} = {⟨𝑦, 𝑧⟩ ∣ [𝐴 / 𝑥]𝜑})
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1542  [wsb 2068  wcel 2107  [wsbc 3740  csb 3856  {copab 5168
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2708
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3an 1090  df-tru 1545  df-ex 1783  df-nf 1787  df-sb 2069  df-clab 2715  df-cleq 2729  df-clel 2815  df-nfc 2890  df-v 3448  df-sbc 3741  df-csb 3857  df-opab 5169
This theorem is referenced by:  csbcnvgALT  5841
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