Theorem strfvd 16528

Description: Deduction version of strfv 16531. (Contributed by Mario Carneiro, 15-Nov-2014.)

Hypotheses

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

Assertion

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

Proof of Theorem strfvd

Step	Hyp	Ref	Expression
1		strfvd.e	. . 3 ⊢ 𝐸 = Slot (𝐸‘ndx)
2		strfvd.s	. . 3 ⊢ (𝜑 → 𝑆 ∈ 𝑉)
3	1, 2	strfvnd 16502	. 2 ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘(𝐸‘ndx)))
4		strfvd.f	. . 3 ⊢ (𝜑 → Fun 𝑆)
5		strfvd.n	. . 3 ⊢ (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
6		funopfv 6717	. . 3 ⊢ (Fun 𝑆 → (⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆 → (𝑆‘(𝐸‘ndx)) = 𝐶))
7	4, 5, 6	sylc 65	. 2 ⊢ (𝜑 → (𝑆‘(𝐸‘ndx)) = 𝐶)
8	3, 7	eqtr2d 2857	1 ⊢ (𝜑 → 𝐶 = (𝐸‘𝑆))

Syntax hints:   → wi 4   = wceq 1537   ∈ wcel 2114  ⟨cop 4573  Fun wfun 6349  ‘cfv 6355  ndxcnx 16480  Slot cslot 16482

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 2793  ax-sep 5203  ax-nul 5210  ax-pr 5330

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 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-sbc 3773  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4839  df-br 5067  df-opab 5129  df-mpt 5147  df-id 5460  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-iota 6314  df-fun 6357  df-fv 6363  df-slot 16487

This theorem is referenced by:  strssd  16533