Theorem strfv2d 16391

Description: Deduction version of strfv2 16392. (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 16364	. 2 ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘(𝐸‘ndx)))
4		cnvcnv2 5895	. . . . 5 ⊢ ◡◡𝑆 = (𝑆 ↾ V)
5	4	fveq1i 6505	. . . 4 ⊢ (◡◡𝑆‘(𝐸‘ndx)) = ((𝑆 ↾ V)‘(𝐸‘ndx))
6		fvex 6517	. . . . 5 ⊢ (𝐸‘ndx) ∈ V
7		fvres 6523	. . . . 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 2804	. . 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 3437	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ V)
14		opelxpi 5448	. . . . . . 7 ⊢ (((𝐸‘ndx) ∈ V ∧ 𝐶 ∈ V) → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (V × V))
15	6, 13, 14	sylancr 579	. . . . . 6 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (V × V))
16	11, 15	elind 4062	. . . . 5 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (𝑆 ∩ (V × V)))
17		cnvcnv 5894	. . . . 5 ⊢ ◡◡𝑆 = (𝑆 ∩ (V × V))
18	16, 17	syl6eleqr 2879	. . . 4 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ ◡◡𝑆)
19		funopfv 6552	. . . 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 2830	. 2 ⊢ (𝜑 → (𝑆‘(𝐸‘ndx)) = 𝐶)
22	3, 21	eqtr2d 2817	1 ⊢ (𝜑 → 𝐶 = (𝐸‘𝑆))

Syntax hints:   → wi 4   = wceq 1508   ∈ wcel 2051  Vcvv 3417   ∩ cin 3830  ⟨cop 4450   × cxp 5409  ^◡ccnv 5410   ↾ cres 5413  Fun wfun 6187  ‘cfv 6193  ndxcnx 16342  Slot cslot 16344

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1759  ax-4 1773  ax-5 1870  ax-6 1929  ax-7 1966  ax-8 2053  ax-9 2060  ax-10 2080  ax-11 2094  ax-12 2107  ax-13 2302  ax-ext 2752  ax-sep 5064  ax-nul 5071  ax-pr 5190

This theorem depends on definitions:  df-bi 199  df-an 388  df-or 835  df-3an 1071  df-tru 1511  df-ex 1744  df-nf 1748  df-sb 2017  df-mo 2551  df-eu 2589  df-clab 2761  df-cleq 2773  df-clel 2848  df-nfc 2920  df-ral 3095  df-rex 3096  df-rab 3099  df-v 3419  df-sbc 3684  df-dif 3834  df-un 3836  df-in 3838  df-ss 3845  df-nul 4182  df-if 4354  df-sn 4445  df-pr 4447  df-op 4451  df-uni 4718  df-br 4935  df-opab 4997  df-mpt 5014  df-id 5316  df-xp 5417  df-rel 5418  df-cnv 5419  df-co 5420  df-dm 5421  df-res 5423  df-iota 6157  df-fun 6195  df-fv 6201  df-slot 16349

This theorem is referenced by:  strfv2  16392  opelstrbas  16459  ebtwntg  26486  ecgrtg  26487  elntg  26488  edgfiedgval  26520