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Theorem elixpconstg 45543
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 8848 . . 3 (𝐹X𝑥𝐴 𝐵𝐹 Fn 𝐴)
2 elixp2 8846 . . . 4 (𝐹X𝑥𝐴 𝐵 ↔ (𝐹 ∈ V ∧ 𝐹 Fn 𝐴 ∧ ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵))
32simp3bi 1153 . . 3 (𝐹X𝑥𝐴 𝐵 → ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵)
4 ffnfv 7067 . . 3 (𝐹:𝐴𝐵 ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵))
51, 3, 4sylanbrc 589 . 2 (𝐹X𝑥𝐴 𝐵𝐹:𝐴𝐵)
6 elex 3453 . . . . 5 (𝐹𝑉𝐹 ∈ V)
76adantr 481 . . . 4 ((𝐹𝑉𝐹:𝐴𝐵) → 𝐹 ∈ V)
8 ffn 6662 . . . . 5 (𝐹:𝐴𝐵𝐹 Fn 𝐴)
98adantl 482 . . . 4 ((𝐹𝑉𝐹:𝐴𝐵) → 𝐹 Fn 𝐴)
104simprbi 498 . . . . 5 (𝐹:𝐴𝐵 → ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵)
1110adantl 482 . . . 4 ((𝐹𝑉𝐹:𝐴𝐵) → ∀𝑥𝐴 (𝐹𝑥) ∈ 𝐵)
127, 9, 11, 2syl3anbrc 1350 . . 3 ((𝐹𝑉𝐹:𝐴𝐵) → 𝐹X𝑥𝐴 𝐵)
1312ex 413 . 2 (𝐹𝑉 → (𝐹:𝐴𝐵𝐹X𝑥𝐴 𝐵))
145, 13impbid2 227 1 (𝐹𝑉 → (𝐹X𝑥𝐴 𝐵𝐹:𝐴𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 207  wa 396  wcel 2119  wral 3054  Vcvv 3432   Fn wfn 6487  wf 6488  cfv 6492  Xcixp 8842
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2712  ax-sep 5225  ax-nul 5235  ax-pr 5369
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2719  df-cleq 2732  df-clel 2815  df-nfc 2889  df-ne 2936  df-ral 3055  df-rex 3065  df-rab 3393  df-v 3434  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4269  df-if 4462  df-sn 4563  df-pr 4565  df-op 4569  df-uni 4846  df-br 5080  df-opab 5142  df-mpt 5161  df-id 5520  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-fv 6500  df-ixp 8843
This theorem is referenced by:  iinhoiicclem  47123
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