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Theorem strslfv2d 13127
Description: Deduction version of strslfv 13129. (Contributed by Mario Carneiro, 30-Apr-2015.) (Revised by Jim Kingdon, 30-Jan-2023.)
Hypotheses
Ref Expression
strslfv2d.e (𝐸 = Slot (𝐸‘ndx) ∧ (𝐸‘ndx) ∈ ℕ)
strfv2d.s (𝜑𝑆𝑉)
strfv2d.f (𝜑 → Fun 𝑆)
strfv2d.n (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
strfv2d.c (𝜑𝐶𝑊)
Assertion
Ref Expression
strslfv2d (𝜑𝐶 = (𝐸𝑆))

Proof of Theorem strslfv2d
StepHypRef Expression
1 strslfv2d.e . . . 4 (𝐸 = Slot (𝐸‘ndx) ∧ (𝐸‘ndx) ∈ ℕ)
21simpli 111 . . 3 𝐸 = Slot (𝐸‘ndx)
3 strfv2d.s . . 3 (𝜑𝑆𝑉)
41simpri 113 . . . 4 (𝐸‘ndx) ∈ ℕ
54a1i 9 . . 3 (𝜑 → (𝐸‘ndx) ∈ ℕ)
62, 3, 5strnfvnd 13104 . 2 (𝜑 → (𝐸𝑆) = (𝑆‘(𝐸‘ndx)))
7 cnvcnv2 5190 . . . 4 𝑆 = (𝑆 ↾ V)
87fveq1i 5640 . . 3 (𝑆‘(𝐸‘ndx)) = ((𝑆 ↾ V)‘(𝐸‘ndx))
95elexd 2816 . . . 4 (𝜑 → (𝐸‘ndx) ∈ V)
10 fvres 5663 . . . 4 ((𝐸‘ndx) ∈ V → ((𝑆 ↾ V)‘(𝐸‘ndx)) = (𝑆‘(𝐸‘ndx)))
119, 10syl 14 . . 3 (𝜑 → ((𝑆 ↾ V)‘(𝐸‘ndx)) = (𝑆‘(𝐸‘ndx)))
128, 11eqtrid 2276 . 2 (𝜑 → (𝑆‘(𝐸‘ndx)) = (𝑆‘(𝐸‘ndx)))
13 strfv2d.f . . 3 (𝜑 → Fun 𝑆)
14 strfv2d.n . . . . 5 (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
15 strfv2d.c . . . . . . 7 (𝜑𝐶𝑊)
1615elexd 2816 . . . . . 6 (𝜑𝐶 ∈ V)
179, 16opelxpd 4758 . . . . 5 (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (V × V))
1814, 17elind 3392 . . . 4 (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ (𝑆 ∩ (V × V)))
19 cnvcnv 5189 . . . 4 𝑆 = (𝑆 ∩ (V × V))
2018, 19eleqtrrdi 2325 . . 3 (𝜑 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
21 funopfv 5683 . . 3 (Fun 𝑆 → (⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆 → (𝑆‘(𝐸‘ndx)) = 𝐶))
2213, 20, 21sylc 62 . 2 (𝜑 → (𝑆‘(𝐸‘ndx)) = 𝐶)
236, 12, 223eqtr2rd 2271 1 (𝜑𝐶 = (𝐸𝑆))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104   = wceq 1397  wcel 2202  Vcvv 2802  cin 3199  cop 3672   × cxp 4723  ccnv 4724  cres 4727  Fun wfun 5320  cfv 5326  cn 9143  ndxcnx 13081  Slot cslot 13083
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-iota 5286  df-fun 5328  df-fv 5334  df-slot 13088
This theorem is referenced by:  strslfv2  13128  strslfv  13129  strslfv3  13130  opelstrsl  13199
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