Theorem setsnidOLD 16814

Description: Obsolete proof of setsnid 16813 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 16789	. . 3 ⊢ (𝑊 ∈ V → (𝐸‘𝑊) = (𝑊‘(𝐸‘ndx)))
4		ovex 7285	. . . . 5 ⊢ (𝑊 sSet ⟨𝐷, 𝐶⟩) ∈ V
5	4, 1	strfvn 16790	. . . 4 ⊢ (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx))
6		setsres 16782	. . . . . 6 ⊢ (𝑊 ∈ V → ((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷})) = (𝑊 ↾ (V ∖ {𝐷})))
7	6	fveq1d 6755	. . . . 5 ⊢ (𝑊 ∈ V → (((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)) = ((𝑊 ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)))
8		fvex 6766	. . . . . . 7 ⊢ (𝐸‘ndx) ∈ V
9		setsnid.n	. . . . . . 7 ⊢ (𝐸‘ndx) ≠ 𝐷
10		eldifsn 4717	. . . . . . 7 ⊢ ((𝐸‘ndx) ∈ (V ∖ {𝐷}) ↔ ((𝐸‘ndx) ∈ V ∧ (𝐸‘ndx) ≠ 𝐷))
11	8, 9, 10	mpbir2an 711	. . . . . 6 ⊢ (𝐸‘ndx) ∈ (V ∖ {𝐷})
12		fvres 6772	. . . . . 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 6772	. . . . . 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 2803	. . . 4 ⊢ (𝑊 ∈ V → ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx)) = (𝑊‘(𝐸‘ndx)))
17	5, 16	eqtrid 2791	. . 3 ⊢ (𝑊 ∈ V → (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = (𝑊‘(𝐸‘ndx)))
18	3, 17	eqtr4d 2782	. 2 ⊢ (𝑊 ∈ V → (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)))
19	1	str0 16793	. . 3 ⊢ ∅ = (𝐸‘∅)
20		fvprc 6745	. . 3 ⊢ (¬ 𝑊 ∈ V → (𝐸‘𝑊) = ∅)
21		reldmsets 16769	. . . . 5 ⊢ Rel dom sSet
22	21	ovprc1 7291	. . . 4 ⊢ (¬ 𝑊 ∈ V → (𝑊 sSet ⟨𝐷, 𝐶⟩) = ∅)
23	22	fveq2d 6757	. . 3 ⊢ (¬ 𝑊 ∈ V → (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = (𝐸‘∅))
24	19, 20, 23	3eqtr4a 2806	. 2 ⊢ (¬ 𝑊 ∈ V → (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)))
25	18, 24	pm2.61i 185	1 ⊢ (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩))

Syntax hints:  ¬ wn 3   = wceq 1543   ∈ wcel 2112   ≠ wne 2943  Vcvv 3423   ∖ cdif 3881  ∅c0 4254  {csn 4558  ⟨cop 4564   ↾ cres 5581  ‘cfv 6415  (class class class)co 7252   sSet csts 16767  Slot cslot 16785  ndxcnx 16797

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2016  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2160  ax-12 2177  ax-ext 2710  ax-sep 5216  ax-nul 5223  ax-pr 5346  ax-un 7563

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 848  df-3an 1091  df-tru 1546  df-fal 1556  df-ex 1788  df-nf 1792  df-sb 2073  df-mo 2541  df-eu 2570  df-clab 2717  df-cleq 2731  df-clel 2818  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-rab 3073  df-v 3425  df-sbc 3713  df-dif 3887  df-un 3889  df-in 3891  df-ss 3901  df-nul 4255  df-if 4457  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-br 5071  df-opab 5133  df-mpt 5153  df-id 5479  df-xp 5585  df-rel 5586  df-cnv 5587  df-co 5588  df-dm 5589  df-res 5591  df-iota 6373  df-fun 6417  df-fv 6423  df-ov 7255  df-oprab 7256  df-mpo 7257  df-sets 16768  df-slot 16786

This theorem is referenced by: (None)