Theorem setsnidOLD 17243

Description: Obsolete version of setsnid 17242 as of 7-Nov-2024. Value of the structure replacement function at an untouched index. (Contributed by Mario Carneiro, 1-Dec-2014.) (Revised by Mario Carneiro, 30-Apr-2015.) (New usage is discouraged.) (Proof modification is discouraged.)

Hypotheses

Ref	Expression
setsid.e	⊢ 𝐸 = Slot (𝐸‘ndx)
setsnid.n	⊢ (𝐸‘ndx) ≠ 𝐷

Assertion

Ref	Expression
setsnidOLD	⊢ (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩))

Proof of Theorem setsnidOLD

Step	Hyp	Ref	Expression
1		setsid.e	. . . 4 ⊢ 𝐸 = Slot (𝐸‘ndx)
2		id 22	. . . 4 ⊢ (𝑊 ∈ V → 𝑊 ∈ V)
3	1, 2	strfvnd 17218	. . 3 ⊢ (𝑊 ∈ V → (𝐸‘𝑊) = (𝑊‘(𝐸‘ndx)))
4		ovex 7463	. . . . 5 ⊢ (𝑊 sSet ⟨𝐷, 𝐶⟩) ∈ V
5	4, 1	strfvn 17219	. . . 4 ⊢ (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx))
6		setsres 17211	. . . . . 6 ⊢ (𝑊 ∈ V → ((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷})) = (𝑊 ↾ (V ∖ {𝐷})))
7	6	fveq1d 6908	. . . . 5 ⊢ (𝑊 ∈ V → (((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)) = ((𝑊 ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)))
8		fvex 6919	. . . . . . 7 ⊢ (𝐸‘ndx) ∈ V
9		setsnid.n	. . . . . . 7 ⊢ (𝐸‘ndx) ≠ 𝐷
10		eldifsn 4790	. . . . . . 7 ⊢ ((𝐸‘ndx) ∈ (V ∖ {𝐷}) ↔ ((𝐸‘ndx) ∈ V ∧ (𝐸‘ndx) ≠ 𝐷))
11	8, 9, 10	mpbir2an 711	. . . . . 6 ⊢ (𝐸‘ndx) ∈ (V ∖ {𝐷})
12		fvres 6925	. . . . . 6 ⊢ ((𝐸‘ndx) ∈ (V ∖ {𝐷}) → (((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)) = ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx)))
13	11, 12	ax-mp 5	. . . . 5 ⊢ (((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)) = ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx))
14		fvres 6925	. . . . . 6 ⊢ ((𝐸‘ndx) ∈ (V ∖ {𝐷}) → ((𝑊 ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)) = (𝑊‘(𝐸‘ndx)))
15	11, 14	ax-mp 5	. . . . 5 ⊢ ((𝑊 ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)) = (𝑊‘(𝐸‘ndx))
16	7, 13, 15	3eqtr3g 2797	. . . 4 ⊢ (𝑊 ∈ V → ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx)) = (𝑊‘(𝐸‘ndx)))
17	5, 16	eqtrid 2786	. . 3 ⊢ (𝑊 ∈ V → (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = (𝑊‘(𝐸‘ndx)))
18	3, 17	eqtr4d 2777	. 2 ⊢ (𝑊 ∈ V → (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)))
19	1	str0 17222	. . 3 ⊢ ∅ = (𝐸‘∅)
20		fvprc 6898	. . 3 ⊢ (¬ 𝑊 ∈ V → (𝐸‘𝑊) = ∅)
21		reldmsets 17198	. . . . 5 ⊢ Rel dom sSet
22	21	ovprc1 7469	. . . 4 ⊢ (¬ 𝑊 ∈ V → (𝑊 sSet ⟨𝐷, 𝐶⟩) = ∅)
23	22	fveq2d 6910	. . 3 ⊢ (¬ 𝑊 ∈ V → (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = (𝐸‘∅))
24	19, 20, 23	3eqtr4a 2800	. 2 ⊢ (¬ 𝑊 ∈ V → (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)))
25	18, 24	pm2.61i 182	1 ⊢ (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩))

Syntax hints:  ¬ wn 3   = wceq 1536   ∈ wcel 2105   ≠ wne 2937  Vcvv 3477   ∖ cdif 3959  ∅c0 4338  {csn 4630  ⟨cop 4636   ↾ cres 5690  ‘cfv 6562  (class class class)co 7430   sSet csts 17196  Slot cslot 17214  ndxcnx 17226

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1791  ax-4 1805  ax-5 1907  ax-6 1964  ax-7 2004  ax-8 2107  ax-9 2115  ax-10 2138  ax-11 2154  ax-12 2174  ax-ext 2705  ax-sep 5301  ax-nul 5311  ax-pr 5437  ax-un 7753

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1539  df-fal 1549  df-ex 1776  df-nf 1780  df-sb 2062  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2726  df-clel 2813  df-nfc 2889  df-ne 2938  df-ral 3059  df-rex 3068  df-rab 3433  df-v 3479  df-sbc 3791  df-dif 3965  df-un 3967  df-in 3969  df-ss 3979  df-nul 4339  df-if 4531  df-sn 4631  df-pr 4633  df-op 4637  df-uni 4912  df-br 5148  df-opab 5210  df-mpt 5231  df-id 5582  df-xp 5694  df-rel 5695  df-cnv 5696  df-co 5697  df-dm 5698  df-res 5700  df-iota 6515  df-fun 6564  df-fv 6570  df-ov 7433  df-oprab 7434  df-mpo 7435  df-sets 17197  df-slot 17215

This theorem is referenced by: (None)