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Theorem strnfvnd 13067
Description: Deduction version of strnfvn 13068. (Contributed by Mario Carneiro, 15-Nov-2014.) (Revised by Jim Kingdon, 19-Jan-2023.)
Hypotheses
Ref Expression
strnfvnd.c 𝐸 = Slot 𝑁
strnfvnd.f (𝜑𝑆𝑉)
strnfvnd.n (𝜑𝑁 ∈ ℕ)
Assertion
Ref Expression
strnfvnd (𝜑 → (𝐸𝑆) = (𝑆𝑁))

Proof of Theorem strnfvnd
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 strnfvnd.f . . 3 (𝜑𝑆𝑉)
21elexd 2813 . 2 (𝜑𝑆 ∈ V)
3 strnfvnd.n . . 3 (𝜑𝑁 ∈ ℕ)
4 fvexg 5648 . . 3 ((𝑆𝑉𝑁 ∈ ℕ) → (𝑆𝑁) ∈ V)
51, 3, 4syl2anc 411 . 2 (𝜑 → (𝑆𝑁) ∈ V)
6 fveq1 5628 . . 3 (𝑥 = 𝑆 → (𝑥𝑁) = (𝑆𝑁))
7 strnfvnd.c . . . 4 𝐸 = Slot 𝑁
8 df-slot 13051 . . . 4 Slot 𝑁 = (𝑥 ∈ V ↦ (𝑥𝑁))
97, 8eqtri 2250 . . 3 𝐸 = (𝑥 ∈ V ↦ (𝑥𝑁))
106, 9fvmptg 5712 . 2 ((𝑆 ∈ V ∧ (𝑆𝑁) ∈ V) → (𝐸𝑆) = (𝑆𝑁))
112, 5, 10syl2anc 411 1 (𝜑 → (𝐸𝑆) = (𝑆𝑁))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1395  wcel 2200  Vcvv 2799  cmpt 4145  cfv 5318  cn 9121  Slot cslot 13046
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 4202  ax-pow 4258  ax-pr 4293  ax-un 4524
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 2801  df-sbc 3029  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-iota 5278  df-fun 5320  df-fv 5326  df-slot 13051
This theorem is referenced by:  strnfvn  13068  strfvssn  13069  strndxid  13075  strsetsid  13080  strslfvd  13089  strslfv2d  13090  setsslid  13098  setsslnid  13099  basm  13109  edgfndxid  15825
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