ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  mptelixpg GIF version

Theorem mptelixpg 6531
Description: Condition for an explicit member of an indexed product. (Contributed by Stefan O'Rear, 4-Jan-2015.)
Assertion
Ref Expression
mptelixpg (𝐼𝑉 → ((𝑥𝐼𝐽) ∈ X𝑥𝐼 𝐾 ↔ ∀𝑥𝐼 𝐽𝐾))
Distinct variable group:   𝑥,𝐼
Allowed substitution hints:   𝐽(𝑥)   𝐾(𝑥)   𝑉(𝑥)

Proof of Theorem mptelixpg
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 elex 2644 . 2 (𝐼𝑉𝐼 ∈ V)
2 nfcv 2235 . . . . . 6 𝑦𝐾
3 nfcsb1v 2977 . . . . . 6 𝑥𝑦 / 𝑥𝐾
4 csbeq1a 2955 . . . . . 6 (𝑥 = 𝑦𝐾 = 𝑦 / 𝑥𝐾)
52, 3, 4cbvixp 6512 . . . . 5 X𝑥𝐼 𝐾 = X𝑦𝐼 𝑦 / 𝑥𝐾
65eleq2i 2161 . . . 4 ((𝑥𝐼𝐽) ∈ X𝑥𝐼 𝐾 ↔ (𝑥𝐼𝐽) ∈ X𝑦𝐼 𝑦 / 𝑥𝐾)
7 elixp2 6499 . . . 4 ((𝑥𝐼𝐽) ∈ X𝑦𝐼 𝑦 / 𝑥𝐾 ↔ ((𝑥𝐼𝐽) ∈ V ∧ (𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾))
8 3anass 931 . . . 4 (((𝑥𝐼𝐽) ∈ V ∧ (𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾) ↔ ((𝑥𝐼𝐽) ∈ V ∧ ((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾)))
96, 7, 83bitri 205 . . 3 ((𝑥𝐼𝐽) ∈ X𝑥𝐼 𝐾 ↔ ((𝑥𝐼𝐽) ∈ V ∧ ((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾)))
10 eqid 2095 . . . . . . . 8 (𝑥𝐼𝐽) = (𝑥𝐼𝐽)
1110fnmpt 5174 . . . . . . 7 (∀𝑥𝐼 𝐽𝐾 → (𝑥𝐼𝐽) Fn 𝐼)
1210fvmpt2 5422 . . . . . . . . 9 ((𝑥𝐼𝐽𝐾) → ((𝑥𝐼𝐽)‘𝑥) = 𝐽)
13 simpr 109 . . . . . . . . 9 ((𝑥𝐼𝐽𝐾) → 𝐽𝐾)
1412, 13eqeltrd 2171 . . . . . . . 8 ((𝑥𝐼𝐽𝐾) → ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾)
1514ralimiaa 2448 . . . . . . 7 (∀𝑥𝐼 𝐽𝐾 → ∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾)
1611, 15jca 301 . . . . . 6 (∀𝑥𝐼 𝐽𝐾 → ((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾))
17 dffn2 5197 . . . . . . . 8 ((𝑥𝐼𝐽) Fn 𝐼 ↔ (𝑥𝐼𝐽):𝐼⟶V)
1810fmpt 5488 . . . . . . . . 9 (∀𝑥𝐼 𝐽 ∈ V ↔ (𝑥𝐼𝐽):𝐼⟶V)
1910fvmpt2 5422 . . . . . . . . . . . . 13 ((𝑥𝐼𝐽 ∈ V) → ((𝑥𝐼𝐽)‘𝑥) = 𝐽)
2019eleq1d 2163 . . . . . . . . . . . 12 ((𝑥𝐼𝐽 ∈ V) → (((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾𝐽𝐾))
2120biimpd 143 . . . . . . . . . . 11 ((𝑥𝐼𝐽 ∈ V) → (((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾𝐽𝐾))
2221ralimiaa 2448 . . . . . . . . . 10 (∀𝑥𝐼 𝐽 ∈ V → ∀𝑥𝐼 (((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾𝐽𝐾))
23 ralim 2445 . . . . . . . . . 10 (∀𝑥𝐼 (((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾𝐽𝐾) → (∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾 → ∀𝑥𝐼 𝐽𝐾))
2422, 23syl 14 . . . . . . . . 9 (∀𝑥𝐼 𝐽 ∈ V → (∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾 → ∀𝑥𝐼 𝐽𝐾))
2518, 24sylbir 134 . . . . . . . 8 ((𝑥𝐼𝐽):𝐼⟶V → (∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾 → ∀𝑥𝐼 𝐽𝐾))
2617, 25sylbi 120 . . . . . . 7 ((𝑥𝐼𝐽) Fn 𝐼 → (∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾 → ∀𝑥𝐼 𝐽𝐾))
2726imp 123 . . . . . 6 (((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾) → ∀𝑥𝐼 𝐽𝐾)
2816, 27impbii 125 . . . . 5 (∀𝑥𝐼 𝐽𝐾 ↔ ((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾))
29 nfv 1473 . . . . . . 7 𝑦((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾
30 nffvmpt1 5351 . . . . . . . 8 𝑥((𝑥𝐼𝐽)‘𝑦)
3130, 3nfel 2244 . . . . . . 7 𝑥((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾
32 fveq2 5340 . . . . . . . 8 (𝑥 = 𝑦 → ((𝑥𝐼𝐽)‘𝑥) = ((𝑥𝐼𝐽)‘𝑦))
3332, 4eleq12d 2165 . . . . . . 7 (𝑥 = 𝑦 → (((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾 ↔ ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾))
3429, 31, 33cbvral 2600 . . . . . 6 (∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾 ↔ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾)
3534anbi2i 446 . . . . 5 (((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑥𝐼 ((𝑥𝐼𝐽)‘𝑥) ∈ 𝐾) ↔ ((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾))
3628, 35bitri 183 . . . 4 (∀𝑥𝐼 𝐽𝐾 ↔ ((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾))
37 mptexg 5561 . . . . 5 (𝐼 ∈ V → (𝑥𝐼𝐽) ∈ V)
3837biantrurd 300 . . . 4 (𝐼 ∈ V → (((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾) ↔ ((𝑥𝐼𝐽) ∈ V ∧ ((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾))))
3936, 38syl5rbb 192 . . 3 (𝐼 ∈ V → (((𝑥𝐼𝐽) ∈ V ∧ ((𝑥𝐼𝐽) Fn 𝐼 ∧ ∀𝑦𝐼 ((𝑥𝐼𝐽)‘𝑦) ∈ 𝑦 / 𝑥𝐾)) ↔ ∀𝑥𝐼 𝐽𝐾))
409, 39syl5bb 191 . 2 (𝐼 ∈ V → ((𝑥𝐼𝐽) ∈ X𝑥𝐼 𝐾 ↔ ∀𝑥𝐼 𝐽𝐾))
411, 40syl 14 1 (𝐼𝑉 → ((𝑥𝐼𝐽) ∈ X𝑥𝐼 𝐾 ↔ ∀𝑥𝐼 𝐽𝐾))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103  wb 104  w3a 927  wcel 1445  wral 2370  Vcvv 2633  csb 2947  cmpt 3921   Fn wfn 5044  wf 5045  cfv 5049  Xcixp 6495
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 668  ax-5 1388  ax-7 1389  ax-gen 1390  ax-ie1 1434  ax-ie2 1435  ax-8 1447  ax-10 1448  ax-11 1449  ax-i12 1450  ax-bndl 1451  ax-4 1452  ax-14 1457  ax-17 1471  ax-i9 1475  ax-ial 1479  ax-i5r 1480  ax-ext 2077  ax-coll 3975  ax-sep 3978  ax-pow 4030  ax-pr 4060
This theorem depends on definitions:  df-bi 116  df-3an 929  df-tru 1299  df-nf 1402  df-sb 1700  df-eu 1958  df-mo 1959  df-clab 2082  df-cleq 2088  df-clel 2091  df-nfc 2224  df-ral 2375  df-rex 2376  df-reu 2377  df-rab 2379  df-v 2635  df-sbc 2855  df-csb 2948  df-un 3017  df-in 3019  df-ss 3026  df-pw 3451  df-sn 3472  df-pr 3473  df-op 3475  df-uni 3676  df-iun 3754  df-br 3868  df-opab 3922  df-mpt 3923  df-id 4144  df-xp 4473  df-rel 4474  df-cnv 4475  df-co 4476  df-dm 4477  df-rn 4478  df-res 4479  df-ima 4480  df-iota 5014  df-fun 5051  df-fn 5052  df-f 5053  df-f1 5054  df-fo 5055  df-f1o 5056  df-fv 5057  df-ixp 6496
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator