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Theorem elixp 8916
Description: Membership in an infinite Cartesian product. (Contributed by NM, 28-Sep-2006.)
Hypothesis
Ref Expression
elixp.1 𝐹 ∈ V
Assertion
Ref Expression
elixp (𝐹 ∈ X𝑥 ∈ 𝐴 𝐵 ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵))
Distinct variable groups:   𝑥,𝐹   𝑥,𝐴
Allowed substitution hint:   𝐵(𝑥)

Proof of Theorem elixp
StepHypRef Expression
1 elixp2 8913 . 2 (𝐹 ∈ X𝑥 ∈ 𝐴 𝐵 ↔ (𝐹 ∈ V ∧ 𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵))
2 elixp.1 . . 3 𝐹 ∈ V
3 3anass 1111 . . 3 ((𝐹 ∈ V ∧ 𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) ↔ (𝐹 ∈ V ∧ (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵)))
42, 3mpbiran 722 . 2 ((𝐹 ∈ V ∧ 𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵))
51, 4bitri 278 1 (𝐹 ∈ X𝑥 ∈ 𝐴 𝐵 ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ↔ wb 209   ∧ wa 401   ∧ w3a 1103   ∈ wcel 2145  ∀wral 3077  Vcvv 3451   Fn wfn 6526  ‘cfv 6531  Xcixp 8909
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2733
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2740  df-cleq 2753  df-clel 2836  df-ral 3078  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-opab 5168  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-iota 6487  df-fun 6533  df-fn 6534  df-fv 6539  df-ixp 8910
This theorem is used by:  elixpconst  8917  ixpin  8935  ixpiin  8936  resixpfo  8948  elixpsn  8949  boxriin  8952  boxcutc  8953  ixpfi2  9323  ixpiunwdom  9568  dfac9  10196  ac9  10542  ac9s  10552  konigthlem  10634  cofucl  18043  yonedalem3  18434  psrbaglefi  22214  ptpjpre1  23870  ptpjcn  23910  ptpjopn  23911  ptclsg  23914  dfac14  23917  pthaus  23937  xkopt  23954  ptcmplem2  24352  ptcmplem3  24353  ptcmplem4  24354  prdsbl  24790  prdsxmslem2  24828  eulerpartlemb  34983  ptpconn  35967  finixpnum  38496  ptrest  38505  poimirlem29  38535  poimirlem30  38536  inixp  38630  prdstotbnd  38696  ioorrnopnlem  47258  hoicvr  47502  hoidmvlelem3  47551  hspdifhsp  47570  hspmbllem2  47581  tmachlem-agreeprod  47891
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