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Theorem 0elixp 8950
Description: Membership of the empty set in an infinite Cartesian product. (Contributed by Steve Rodriguez, 29-Sep-2006.)
Assertion
Ref Expression
0elixp ∅ ∈ X𝑥 ∈ ∅ 𝐴

Proof of Theorem 0elixp
StepHypRef Expression
1 0ex 5261 . . 3 ∅ ∈ V
21snid 4623 . 2 ∅ ∈ {∅}
3 ixp0x 8947 . 2 X𝑥 ∈ ∅ 𝐴 = {∅}
42, 3eleqtrri 2860 1 ∅ ∈ X𝑥 ∈ ∅ 𝐴
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ∈ wcel 2145  ∅c0 4279  {csn 4584  Xcixp 8918
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  ax-sep 5249  ax-nul 5260  ax-pr 5391
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-mo 2565  df-clab 2740  df-cleq 2753  df-clel 2836  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-br 5104  df-opab 5168  df-id 5546  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-fun 6539  df-fn 6540  df-ixp 8919
This theorem is used by: (None)
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