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Theorem bnj540 32880
Description: Technical lemma for bnj852 32909. This lemma may no longer be used or have become an indirect lemma of the theorem in question (i.e. a lemma of a lemma... of the theorem). (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)
Hypotheses
Ref Expression
bnj540.1 (𝜓 ↔ ∀𝑖 ∈ ω (suc 𝑖𝑁 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
bnj540.2 (𝜓″[𝐺 / 𝑓]𝜓)
bnj540.3 𝐺 ∈ V
Assertion
Ref Expression
bnj540 (𝜓″ ↔ ∀𝑖 ∈ ω (suc 𝑖𝑁 → (𝐺‘suc 𝑖) = 𝑦 ∈ (𝐺𝑖) pred(𝑦, 𝐴, 𝑅)))
Distinct variable groups:   𝐴,𝑓   𝑓,𝐺,𝑖,𝑦   𝑓,𝑁   𝑅,𝑓
Allowed substitution hints:   𝜓(𝑦,𝑓,𝑖)   𝐴(𝑦,𝑖)   𝑅(𝑦,𝑖)   𝑁(𝑦,𝑖)   𝜓″(𝑦,𝑓,𝑖)

Proof of Theorem bnj540
StepHypRef Expression
1 bnj540.2 . 2 (𝜓″[𝐺 / 𝑓]𝜓)
2 bnj540.1 . . . 4 (𝜓 ↔ ∀𝑖 ∈ ω (suc 𝑖𝑁 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
32sbcbii 3775 . . 3 ([𝐺 / 𝑓]𝜓[𝐺 / 𝑓]𝑖 ∈ ω (suc 𝑖𝑁 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
4 bnj540.3 . . . 4 𝐺 ∈ V
54bnj538 32728 . . 3 ([𝐺 / 𝑓]𝑖 ∈ ω (suc 𝑖𝑁 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)) ↔ ∀𝑖 ∈ ω [𝐺 / 𝑓](suc 𝑖𝑁 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
6 sbcimg 3766 . . . . 5 (𝐺 ∈ V → ([𝐺 / 𝑓](suc 𝑖𝑁 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)) ↔ ([𝐺 / 𝑓]suc 𝑖𝑁[𝐺 / 𝑓](𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅))))
74, 6ax-mp 5 . . . 4 ([𝐺 / 𝑓](suc 𝑖𝑁 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)) ↔ ([𝐺 / 𝑓]suc 𝑖𝑁[𝐺 / 𝑓](𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
87ralbii 3091 . . 3 (∀𝑖 ∈ ω [𝐺 / 𝑓](suc 𝑖𝑁 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)) ↔ ∀𝑖 ∈ ω ([𝐺 / 𝑓]suc 𝑖𝑁[𝐺 / 𝑓](𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
93, 5, 83bitri 297 . 2 ([𝐺 / 𝑓]𝜓 ↔ ∀𝑖 ∈ ω ([𝐺 / 𝑓]suc 𝑖𝑁[𝐺 / 𝑓](𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
104bnj525 32726 . . . 4 ([𝐺 / 𝑓]suc 𝑖𝑁 ↔ suc 𝑖𝑁)
11 fveq1 6765 . . . . . 6 (𝑓 = 𝐺 → (𝑓‘suc 𝑖) = (𝐺‘suc 𝑖))
12 fveq1 6765 . . . . . . 7 (𝑓 = 𝐺 → (𝑓𝑖) = (𝐺𝑖))
1312bnj1113 32773 . . . . . 6 (𝑓 = 𝐺 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅) = 𝑦 ∈ (𝐺𝑖) pred(𝑦, 𝐴, 𝑅))
1411, 13eqeq12d 2754 . . . . 5 (𝑓 = 𝐺 → ((𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅) ↔ (𝐺‘suc 𝑖) = 𝑦 ∈ (𝐺𝑖) pred(𝑦, 𝐴, 𝑅)))
154, 14sbcie 3758 . . . 4 ([𝐺 / 𝑓](𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅) ↔ (𝐺‘suc 𝑖) = 𝑦 ∈ (𝐺𝑖) pred(𝑦, 𝐴, 𝑅))
1610, 15imbi12i 351 . . 3 (([𝐺 / 𝑓]suc 𝑖𝑁[𝐺 / 𝑓](𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)) ↔ (suc 𝑖𝑁 → (𝐺‘suc 𝑖) = 𝑦 ∈ (𝐺𝑖) pred(𝑦, 𝐴, 𝑅)))
1716ralbii 3091 . 2 (∀𝑖 ∈ ω ([𝐺 / 𝑓]suc 𝑖𝑁[𝐺 / 𝑓](𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)) ↔ ∀𝑖 ∈ ω (suc 𝑖𝑁 → (𝐺‘suc 𝑖) = 𝑦 ∈ (𝐺𝑖) pred(𝑦, 𝐴, 𝑅)))
181, 9, 173bitri 297 1 (𝜓″ ↔ ∀𝑖 ∈ ω (suc 𝑖𝑁 → (𝐺‘suc 𝑖) = 𝑦 ∈ (𝐺𝑖) pred(𝑦, 𝐴, 𝑅)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205   = wceq 1539  wcel 2106  wral 3064  Vcvv 3429  [wsbc 3715   ciun 4924  suc csuc 6261  cfv 6426  ωcom 7702   predc-bnj14 32675
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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-tru 1542  df-ex 1783  df-nf 1787  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ral 3069  df-rex 3070  df-v 3431  df-sbc 3716  df-in 3893  df-ss 3903  df-uni 4840  df-iun 4926  df-br 5074  df-iota 6384  df-fv 6434
This theorem is referenced by:  bnj580  32901  bnj607  32904
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