Theorem setsnidOLD 17257

Description: Obsolete proof of setsnid 17256 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 17232	. . 3 ⊢ (𝑊 ∈ V → (𝐸‘𝑊) = (𝑊‘(𝐸‘ndx)))
4		ovex 7481	. . . . 5 ⊢ (𝑊 sSet ⟨𝐷, 𝐶⟩) ∈ V
5	4, 1	strfvn 17233	. . . 4 ⊢ (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = ((𝑊 sSet ⟨𝐷, 𝐶⟩)‘(𝐸‘ndx))
6		setsres 17225	. . . . . 6 ⊢ (𝑊 ∈ V → ((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷})) = (𝑊 ↾ (V ∖ {𝐷})))
7	6	fveq1d 6922	. . . . 5 ⊢ (𝑊 ∈ V → (((𝑊 sSet ⟨𝐷, 𝐶⟩) ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)) = ((𝑊 ↾ (V ∖ {𝐷}))‘(𝐸‘ndx)))
8		fvex 6933	. . . . . . 7 ⊢ (𝐸‘ndx) ∈ V
9		setsnid.n	. . . . . . 7 ⊢ (𝐸‘ndx) ≠ 𝐷
10		eldifsn 4811	. . . . . . 7 ⊢ ((𝐸‘ndx) ∈ (V ∖ {𝐷}) ↔ ((𝐸‘ndx) ∈ V ∧ (𝐸‘ndx) ≠ 𝐷))
11	8, 9, 10	mpbir2an 710	. . . . . 6 ⊢ (𝐸‘ndx) ∈ (V ∖ {𝐷})
12		fvres 6939	. . . . . 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 6939	. . . . . 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 2792	. . 3 ⊢ (𝑊 ∈ V → (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)) = (𝑊‘(𝐸‘ndx)))
18	3, 17	eqtr4d 2783	. 2 ⊢ (𝑊 ∈ V → (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩)))
19	1	str0 17236	. . 3 ⊢ ∅ = (𝐸‘∅)
20		fvprc 6912	. . 3 ⊢ (¬ 𝑊 ∈ V → (𝐸‘𝑊) = ∅)
21		reldmsets 17212	. . . . 5 ⊢ Rel dom sSet
22	21	ovprc1 7487	. . . 4 ⊢ (¬ 𝑊 ∈ V → (𝑊 sSet ⟨𝐷, 𝐶⟩) = ∅)
23	22	fveq2d 6924	. . 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 182	1 ⊢ (𝐸‘𝑊) = (𝐸‘(𝑊 sSet ⟨𝐷, 𝐶⟩))

Syntax hints:  ¬ wn 3   = wceq 1537   ∈ wcel 2108   ≠ wne 2946  Vcvv 3488   ∖ cdif 3973  ∅c0 4352  {csn 4648  ⟨cop 4654   ↾ cres 5702  ‘cfv 6573  (class class class)co 7448   sSet csts 17210  Slot cslot 17228  ndxcnx 17240

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pr 5447  ax-un 7770

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-rab 3444  df-v 3490  df-sbc 3805  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-br 5167  df-opab 5229  df-mpt 5250  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-res 5712  df-iota 6525  df-fun 6575  df-fv 6581  df-ov 7451  df-oprab 7452  df-mpo 7453  df-sets 17211  df-slot 17229

This theorem is referenced by: (None)