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Theorem elixpconstg 44991
Description: Membership in an infinite Cartesian product of a constant 𝐵. (Contributed by Glauco Siliprandi, 8-Apr-2021.)
Assertion
Ref Expression
elixpconstg (𝐹𝑉 → (𝐹X𝑥𝐴 𝐵𝐹:𝐴𝐵))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐹
Allowed substitution hint:   𝑉(𝑥)

Proof of Theorem elixpconstg
StepHypRef Expression
1 ixpfn 8961 . . 3 (𝐹X𝑥𝐴 𝐵𝐹 Fn 𝐴)
2 elixp2 8959 . . . 4 (𝐹X𝑥𝐴 𝐵 ↔ (𝐹 ∈ V ∧ 𝐹 Fn 𝐴 ∧ ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵))
32simp3bi 1147 . . 3 (𝐹X𝑥𝐴 𝐵 → ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵)
4 ffnfv 7153 . . 3 (𝐹:𝐴𝐵 ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵))
51, 3, 4sylanbrc 582 . 2 (𝐹X𝑥𝐴 𝐵𝐹:𝐴𝐵)
6 elex 3509 . . . . 5 (𝐹𝑉𝐹 ∈ V)
76adantr 480 . . . 4 ((𝐹𝑉𝐹:𝐴𝐵) → 𝐹 ∈ V)
8 ffn 6747 . . . . 5 (𝐹:𝐴𝐵𝐹 Fn 𝐴)
98adantl 481 . . . 4 ((𝐹𝑉𝐹:𝐴𝐵) → 𝐹 Fn 𝐴)
104simprbi 496 . . . . 5 (𝐹:𝐴𝐵 → ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵)
1110adantl 481 . . . 4 ((𝐹𝑉𝐹:𝐴𝐵) → ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵)
127, 9, 11, 2syl3anbrc 1343 . . 3 ((𝐹𝑉𝐹:𝐴𝐵) → 𝐹X𝑥𝐴 𝐵)
1312ex 412 . 2 (𝐹𝑉 → (𝐹:𝐴𝐵𝐹X𝑥𝐴 𝐵))
145, 13impbid2 226 1 (𝐹𝑉 → (𝐹X𝑥𝐴 𝐵𝐹:𝐴𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  wcel 2108  wral 3067  Vcvv 3488   Fn wfn 6568  wf 6569  cfv 6573  Xcixp 8955
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pr 5447
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-rab 3444  df-v 3490  df-dif 3979  df-un 3981  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-br 5167  df-opab 5229  df-mpt 5250  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-iota 6525  df-fun 6575  df-fn 6576  df-f 6577  df-fv 6581  df-ixp 8956
This theorem is referenced by:  iinhoiicclem  46594
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