Theorem bnj1520 35248

Description: Technical lemma for bnj1500 35250. 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
bnj1520.1	⊢ 𝐵 = {𝑑 ∣ (𝑑 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑)}
bnj1520.2	⊢ 𝑌 = ⟨𝑥, (𝑓 ↾ pred(𝑥, 𝐴, 𝑅))⟩
bnj1520.3	⊢ 𝐶 = {𝑓 ∣ ∃𝑑 ∈ 𝐵 (𝑓 Fn 𝑑 ∧ ∀𝑥 ∈ 𝑑 (𝑓‘𝑥) = (𝐺‘𝑌))}
bnj1520.4	⊢ 𝐹 = ∪ 𝐶

Assertion

Ref	Expression
bnj1520	⊢ ((𝐹‘𝑥) = (𝐺‘⟨𝑥, (𝐹 ↾ pred(𝑥, 𝐴, 𝑅))⟩) → ∀𝑓(𝐹‘𝑥) = (𝐺‘⟨𝑥, (𝐹 ↾ pred(𝑥, 𝐴, 𝑅))⟩))

Distinct variable groups:   𝐴,𝑓   𝑓,𝐺   𝑅,𝑓   𝑥,𝑓

Allowed substitution hints:   𝐴(𝑥,𝑑)   𝐵(𝑥,𝑓,𝑑)   𝐶(𝑥,𝑓,𝑑)   𝑅(𝑥,𝑑)   𝐹(𝑥,𝑓,𝑑)   𝐺(𝑥,𝑑)   𝑌(𝑥,𝑓,𝑑)

Proof of Theorem bnj1520

Dummy variable 𝑤 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		bnj1520.4	. . . . 5 ⊢ 𝐹 = ∪ 𝐶
2		bnj1520.3	. . . . . . . 8 ⊢ 𝐶 = {𝑓 ∣ ∃𝑑 ∈ 𝐵 (𝑓 Fn 𝑑 ∧ ∀𝑥 ∈ 𝑑 (𝑓‘𝑥) = (𝐺‘𝑌))}
3	2	bnj1317 35003	. . . . . . 7 ⊢ (𝑤 ∈ 𝐶 → ∀𝑓 𝑤 ∈ 𝐶)
4	3	nfcii 2888	. . . . . 6 ⊢ Ⅎ𝑓𝐶
5	4	nfuni 4872	. . . . 5 ⊢ Ⅎ𝑓∪ 𝐶
6	1, 5	nfcxfr 2897	. . . 4 ⊢ Ⅎ𝑓𝐹
7		nfcv 2899	. . . 4 ⊢ Ⅎ𝑓𝑥
8	6, 7	nffv 6854	. . 3 ⊢ Ⅎ𝑓(𝐹‘𝑥)
9		nfcv 2899	. . . 4 ⊢ Ⅎ𝑓𝐺
10		nfcv 2899	. . . . . 6 ⊢ Ⅎ𝑓 pred(𝑥, 𝐴, 𝑅)
11	6, 10	nfres 5950	. . . . 5 ⊢ Ⅎ𝑓(𝐹 ↾ pred(𝑥, 𝐴, 𝑅))
12	7, 11	nfop 4847	. . . 4 ⊢ Ⅎ𝑓⟨𝑥, (𝐹 ↾ pred(𝑥, 𝐴, 𝑅))⟩
13	9, 12	nffv 6854	. . 3 ⊢ Ⅎ𝑓(𝐺‘⟨𝑥, (𝐹 ↾ pred(𝑥, 𝐴, 𝑅))⟩)
14	8, 13	nfeq 2913	. 2 ⊢ Ⅎ𝑓(𝐹‘𝑥) = (𝐺‘⟨𝑥, (𝐹 ↾ pred(𝑥, 𝐴, 𝑅))⟩)
15	14	nf5ri 2203	1 ⊢ ((𝐹‘𝑥) = (𝐺‘⟨𝑥, (𝐹 ↾ pred(𝑥, 𝐴, 𝑅))⟩) → ∀𝑓(𝐹‘𝑥) = (𝐺‘⟨𝑥, (𝐹 ↾ pred(𝑥, 𝐴, 𝑅))⟩))

Syntax hints:   → wi 4   ∧ wa 395  ∀wal 1540   = wceq 1542  {cab 2715  ∀wral 3052  ∃wrex 3062   ⊆ wss 3903  ⟨cop 4588  ∪ cuni 4865   ↾ cres 5636   Fn wfn 6497  ‘cfv 6502   predc-bnj14 34871

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 2709

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-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ral 3053  df-rex 3063  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-xp 5640  df-res 5646  df-iota 6458  df-fv 6510

This theorem is referenced by:  bnj1501  35249