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Theorem elixp 8963
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 8960 . 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 2147  ∀wral 3080  Vcvv 3454   Fn wfn 6556  ‘cfv 6561  Xcixp 8956
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 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-ext 2735
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 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ral 3081  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-br 5107  df-opab 5172  df-rel 5663  df-cnv 5664  df-co 5665  df-dm 5666  df-iota 6515  df-fun 6563  df-fn 6564  df-fv 6569  df-ixp 8957
This theorem is used by:  elixpconst  8964  ixpin  8982  ixpiin  8983  resixpfo  8995  elixpsn  8996  boxriin  8999  boxcutc  9000  ixpfi2  9370  ixpiunwdom  9614  dfac9  10245  ac9  10591  ac9s  10601  konigthlem  10683  cofucl  18095  yonedalem3  18486  psrbaglefi  22267  ptpjpre1  23923  ptpjcn  23963  ptpjopn  23964  ptclsg  23967  dfac14  23970  pthaus  23990  xkopt  24007  ptcmplem2  24405  ptcmplem3  24406  ptcmplem4  24407  prdsbl  24843  prdsxmslem2  24881  eulerpartlemb  35083  ptpconn  36178  finixpnum  38733  ptrest  38742  poimirlem29  38772  poimirlem30  38773  inixp  38867  prdstotbnd  38931  ioorrnopnlem  47529  hoicvr  47773  hoidmvlelem3  47822  hspdifhsp  47841  hspmbllem2  47852  tmachlem-agreeprod  48162
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