Theorem strfv2d 16531

Description: Deduction version of strfv2 16532. (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 16504	. 2 ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘(𝐸‘ndx)))
4		cnvcnv2 6052	. . . . 5 ⊢ ◡◡𝑆 = (𝑆 ↾ V)
5	4	fveq1i 6673	. . . 4 ⊢ (◡◡𝑆‘(𝐸‘ndx)) = ((𝑆 ↾ V)‘(𝐸‘ndx))
6		fvex 6685	. . . . 5 ⊢ (𝐸‘ndx) ∈ V
7		fvres 6691	. . . . 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 2846	. . 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 3516	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ V)
14		opelxpi 5594	. . . . . . 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 4173	. . . . 5 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (𝑆 ∩ (V × V)))
17		cnvcnv 6051	. . . . 5 ⊢ ◡◡𝑆 = (𝑆 ∩ (V × V))
18	16, 17	eleqtrrdi 2926	. . . 4 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ ◡◡𝑆)
19		funopfv 6719	. . . 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 2872	. 2 ⊢ (𝜑 → (𝑆‘(𝐸‘ndx)) = 𝐶)
22	3, 21	eqtr2d 2859	1 ⊢ (𝜑 → 𝐶 = (𝐸‘𝑆))

Syntax hints:   → wi 4   = wceq 1537   ∈ wcel 2114  Vcvv 3496   ∩ cin 3937  ⟨cop 4575   × cxp 5555  ^◡ccnv 5556   ↾ cres 5559  Fun wfun 6351  ‘cfv 6357  ndxcnx 16482  Slot cslot 16484

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pr 5332

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ral 3145  df-rex 3146  df-rab 3149  df-v 3498  df-sbc 3775  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-br 5069  df-opab 5131  df-mpt 5149  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-res 5569  df-iota 6316  df-fun 6359  df-fv 6365  df-slot 16489

This theorem is referenced by:  strfv2  16532  opelstrbas  16599  ebtwntg  26770  ecgrtg  26771  elntg  26772  edgfiedgval  26804