Theorem strfv2d 16523

Description: Deduction version of strfv2 16524. (Contributed by Mario Carneiro, 30-Apr-2015.)

Hypotheses

Ref	Expression
strfv2d.e	⊢ 𝐸 = Slot (𝐸‘ndx)
strfv2d.s	⊢ (𝜑 → 𝑆 ∈ 𝑉)
strfv2d.f	⊢ (𝜑 → Fun ◡◡𝑆)
strfv2d.n	⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
strfv2d.c	⊢ (𝜑 → 𝐶 ∈ 𝑊)

Assertion

Ref	Expression
strfv2d	⊢ (𝜑 → 𝐶 = (𝐸‘𝑆))

Proof of Theorem strfv2d

Step	Hyp	Ref	Expression
1		strfv2d.e	. . 3 ⊢ 𝐸 = Slot (𝐸‘ndx)
2		strfv2d.s	. . 3 ⊢ (𝜑 → 𝑆 ∈ 𝑉)
3	1, 2	strfvnd 16496	. 2 ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘(𝐸‘ndx)))
4		cnvcnv2 6045	. . . . 5 ⊢ ◡◡𝑆 = (𝑆 ↾ V)
5	4	fveq1i 6666	. . . 4 ⊢ (◡◡𝑆‘(𝐸‘ndx)) = ((𝑆 ↾ V)‘(𝐸‘ndx))
6		fvex 6678	. . . . 5 ⊢ (𝐸‘ndx) ∈ V
7		fvres 6684	. . . . 5 ⊢ ((𝐸‘ndx) ∈ V → ((𝑆 ↾ V)‘(𝐸‘ndx)) = (𝑆‘(𝐸‘ndx)))
8	6, 7	ax-mp 5	. . . 4 ⊢ ((𝑆 ↾ V)‘(𝐸‘ndx)) = (𝑆‘(𝐸‘ndx))
9	5, 8	eqtri 2844	. . 3 ⊢ (◡◡𝑆‘(𝐸‘ndx)) = (𝑆‘(𝐸‘ndx))
10		strfv2d.f	. . . 4 ⊢ (𝜑 → Fun ◡◡𝑆)
11		strfv2d.n	. . . . . 6 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
12		strfv2d.c	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ 𝑊)
13	12	elexd 3515	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ V)
14		opelxpi 5587	. . . . . . 7 ⊢ (((𝐸‘ndx) ∈ V ∧ 𝐶 ∈ V) → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (V × V))
15	6, 13, 14	sylancr 589	. . . . . 6 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (V × V))
16	11, 15	elind 4171	. . . . 5 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (𝑆 ∩ (V × V)))
17		cnvcnv 6044	. . . . 5 ⊢ ◡◡𝑆 = (𝑆 ∩ (V × V))
18	16, 17	eleqtrrdi 2924	. . . 4 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ ◡◡𝑆)
19		funopfv 6712	. . . 4 ⊢ (Fun ◡◡𝑆 → (⟨(𝐸‘ndx), 𝐶⟩ ∈ ◡◡𝑆 → (◡◡𝑆‘(𝐸‘ndx)) = 𝐶))
20	10, 18, 19	sylc 65	. . 3 ⊢ (𝜑 → (◡◡𝑆‘(𝐸‘ndx)) = 𝐶)
21	9, 20	syl5eqr 2870	. 2 ⊢ (𝜑 → (𝑆‘(𝐸‘ndx)) = 𝐶)
22	3, 21	eqtr2d 2857	1 ⊢ (𝜑 → 𝐶 = (𝐸‘𝑆))

Syntax hints:   → wi 4   = wceq 1533   ∈ wcel 2110  Vcvv 3495   ∩ cin 3935  ⟨cop 4567   × cxp 5548  ^◡ccnv 5549   ↾ cres 5552  Fun wfun 6344  ‘cfv 6350  ndxcnx 16474  Slot cslot 16476

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pr 5322

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3497  df-sbc 3773  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-res 5562  df-iota 6309  df-fun 6352  df-fv 6358  df-slot 16481

This theorem is referenced by:  strfv2  16524  opelstrbas  16591  ebtwntg  26762  ecgrtg  26763  elntg  26764  edgfiedgval  26796