Theorem setsnidOLD 17147

Description: Obsolete proof of setsnid 17146 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 17122	. . 3 ⊢ (𝑊 ∈ V → (𝐸‘𝑊) = (𝑊‘(𝐸‘ndx)))
4		ovex 7444	. . . . 5 ⊢ (𝑊 sSet ⟨𝐷, 𝐶⟩) ∈ V
5	4, 1	strfvn 17123	. . . 4 ⊢ (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx))
6		setsres 17115	. . . . . 6 ⊢ (𝑊 ∈ V → ((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷})) = (𝑊 ↾ (V ∖ {𝐷})))
7	6	fveq1d 6892	. . . . 5 ⊢ (𝑊 ∈ V → (((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)) = ((𝑊 ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)))
8		fvex 6903	. . . . . . 7 ⊢ (𝐸‘ndx) ∈ V
9		setsnid.n	. . . . . . 7 ⊢ (𝐸‘ndx) ≠ 𝐷
10		eldifsn 4789	. . . . . . 7 ⊢ ((𝐸‘ndx) ∈ (V ∖ {𝐷}) ↔ ((𝐸‘ndx) ∈ V ∧ (𝐸‘ndx) ≠ 𝐷))
11	8, 9, 10	mpbir2an 707	. . . . . 6 ⊢ (𝐸‘ndx) ∈ (V ∖ {𝐷})
12		fvres 6909	. . . . . 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 6909	. . . . . 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 2793	. . . 4 ⊢ (𝑊 ∈ V → ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx)) = (𝑊‘(𝐸‘ndx)))
17	5, 16	eqtrid 2782	. . 3 ⊢ (𝑊 ∈ V → (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = (𝑊‘(𝐸‘ndx)))
18	3, 17	eqtr4d 2773	. 2 ⊢ (𝑊 ∈ V → (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)))
19	1	str0 17126	. . 3 ⊢ ∅ = (𝐸‘∅)
20		fvprc 6882	. . 3 ⊢ (¬ 𝑊 ∈ V → (𝐸‘𝑊) = ∅)
21		reldmsets 17102	. . . . 5 ⊢ Rel dom sSet
22	21	ovprc1 7450	. . . 4 ⊢ (¬ 𝑊 ∈ V → (𝑊 sSet ⟨𝐷, 𝐶⟩) = ∅)
23	22	fveq2d 6894	. . 3 ⊢ (¬ 𝑊 ∈ V → (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = (𝐸‘∅))
24	19, 20, 23	3eqtr4a 2796	. 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 1539   ∈ wcel 2104   ≠ wne 2938  Vcvv 3472   ∖ cdif 3944  ∅c0 4321  {csn 4627  ⟨cop 4633   ↾ cres 5677  ‘cfv 6542  (class class class)co 7411   sSet csts 17100  Slot cslot 17118  ndxcnx 17130

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1911  ax-6 1969  ax-7 2009  ax-8 2106  ax-9 2114  ax-10 2135  ax-11 2152  ax-12 2169  ax-ext 2701  ax-sep 5298  ax-nul 5305  ax-pr 5426  ax-un 7727

This theorem depends on definitions:  df-bi 206  df-an 395  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2532  df-eu 2561  df-clab 2708  df-cleq 2722  df-clel 2808  df-nfc 2883  df-ne 2939  df-ral 3060  df-rex 3069  df-rab 3431  df-v 3474  df-sbc 3777  df-dif 3950  df-un 3952  df-in 3954  df-ss 3964  df-nul 4322  df-if 4528  df-sn 4628  df-pr 4630  df-op 4634  df-uni 4908  df-br 5148  df-opab 5210  df-mpt 5231  df-id 5573  df-xp 5681  df-rel 5682  df-cnv 5683  df-co 5684  df-dm 5685  df-res 5687  df-iota 6494  df-fun 6544  df-fv 6550  df-ov 7414  df-oprab 7415  df-mpo 7416  df-sets 17101  df-slot 17119

This theorem is referenced by: (None)