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Theorem strslfvd 13117
Description: Deduction version of strslfv 13120. (Contributed by Mario Carneiro, 15-Nov-2014.) (Revised by Jim Kingdon, 30-Jan-2023.)
Hypotheses
Ref Expression
strslfvd.e (𝐸 = Slot (𝐸‘ndx) ∧ (𝐸‘ndx) ∈ ℕ)
strfvd.s (𝜑𝑆𝑉)
strfvd.f (𝜑 → Fun 𝑆)
strfvd.n (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
Assertion
Ref Expression
strslfvd (𝜑𝐶 = (𝐸𝑆))

Proof of Theorem strslfvd
StepHypRef Expression
1 strslfvd.e . . . 4 (𝐸 = Slot (𝐸‘ndx) ∧ (𝐸‘ndx) ∈ ℕ)
21simpli 111 . . 3 𝐸 = Slot (𝐸‘ndx)
3 strfvd.s . . 3 (𝜑𝑆𝑉)
41simpri 113 . . . 4 (𝐸‘ndx) ∈ ℕ
54a1i 9 . . 3 (𝜑 → (𝐸‘ndx) ∈ ℕ)
62, 3, 5strnfvnd 13095 . 2 (𝜑 → (𝐸𝑆) = (𝑆‘(𝐸‘ndx)))
7 strfvd.f . . 3 (𝜑 → Fun 𝑆)
8 strfvd.n . . 3 (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
9 funopfv 5679 . . 3 (Fun 𝑆 → (⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆 → (𝑆‘(𝐸‘ndx)) = 𝐶))
107, 8, 9sylc 62 . 2 (𝜑 → (𝑆‘(𝐸‘ndx)) = 𝐶)
116, 10eqtr2d 2263 1 (𝜑𝐶 = (𝐸𝑆))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104   = wceq 1395  wcel 2200  cop 3670  Fun wfun 5318  cfv 5324  cn 9136  ndxcnx 13072  Slot cslot 13074
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pow 4262  ax-pr 4297  ax-un 4528
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2802  df-sbc 3030  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-br 4087  df-opab 4149  df-mpt 4150  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-iota 5284  df-fun 5326  df-fv 5332  df-slot 13079
This theorem is referenced by:  strslssd  13122  1strbas  13193  2strbasg  13196  2stropg  13197
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