Theorem strfv2d 15905

Description: Deduction version of strfv 15907. (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 15876	. 2 ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘(𝐸‘ndx)))
4		cnvcnv2 5588	. . . . 5 ⊢ ◡◡𝑆 = (𝑆 ↾ V)
5	4	fveq1i 6192	. . . 4 ⊢ (◡◡𝑆‘(𝐸‘ndx)) = ((𝑆 ↾ V)‘(𝐸‘ndx))
6		fvex 6201	. . . . 5 ⊢ (𝐸‘ndx) ∈ V
7		fvres 6207	. . . . 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 2644	. . 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		elex 3212	. . . . . . . 8 ⊢ (𝐶 ∈ 𝑊 → 𝐶 ∈ V)
14	12, 13	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ V)
15		opelxpi 5148	. . . . . . 7 ⊢ (((𝐸‘ndx) ∈ V ∧ 𝐶 ∈ V) → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (V × V))
16	6, 14, 15	sylancr 695	. . . . . 6 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (V × V))
17	11, 16	elind 3798	. . . . 5 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (𝑆 ∩ (V × V)))
18		cnvcnv 5586	. . . . 5 ⊢ ◡◡𝑆 = (𝑆 ∩ (V × V))
19	17, 18	syl6eleqr 2712	. . . 4 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ ◡◡𝑆)
20		funopfv 6235	. . . 4 ⊢ (Fun ◡◡𝑆 → (⟨(𝐸‘ndx), 𝐶⟩ ∈ ◡◡𝑆 → (◡◡𝑆‘(𝐸‘ndx)) = 𝐶))
21	10, 19, 20	sylc 65	. . 3 ⊢ (𝜑 → (◡◡𝑆‘(𝐸‘ndx)) = 𝐶)
22	9, 21	syl5eqr 2670	. 2 ⊢ (𝜑 → (𝑆‘(𝐸‘ndx)) = 𝐶)
23	3, 22	eqtr2d 2657	1 ⊢ (𝜑 → 𝐶 = (𝐸‘𝑆))

Syntax hints:   → wi 4   = wceq 1483   ∈ wcel 1990  Vcvv 3200   ∩ cin 3573  ⟨cop 4183   × cxp 5112  ^◡ccnv 5113   ↾ cres 5116  Fun wfun 5882  ‘cfv 5888  ndxcnx 15854  Slot cslot 15856

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-res 5126  df-iota 5851  df-fun 5890  df-fv 5896  df-slot 15861

This theorem is referenced by:  strfv2  15906  opelstrbas  15978  eengbas  25861  ebtwntg  25862  ecgrtg  25863  elntg  25864  edgfiedgval  25902