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Theorem 0pwfi 45490
Description: The empty set is in any power set, and it's finite. (Contributed by Glauco Siliprandi, 17-Aug-2020.)
Assertion
Ref Expression
0pwfi ∅ ∈ (𝒫 𝐴 ∩ Fin)

Proof of Theorem 0pwfi
StepHypRef Expression
1 0elpw 5297 . 2 ∅ ∈ 𝒫 𝐴
2 0fi 8989 . 2 ∅ ∈ Fin
31, 2elini 4139 1 ∅ ∈ (𝒫 𝐴 ∩ Fin)
Colors of variables: wff setvar class
Syntax hints:  wcel 2114  cin 3888  c0 4273  𝒫 cpw 4541  Fincfn 8893
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2708  ax-sep 5231  ax-nul 5241  ax-pr 5375
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-mo 2539  df-clab 2715  df-cleq 2728  df-clel 2811  df-ne 2933  df-ral 3052  df-rex 3062  df-rab 3390  df-v 3431  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-pss 3909  df-nul 4274  df-if 4467  df-pw 4543  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-br 5086  df-opab 5148  df-tr 5193  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-ord 6326  df-on 6327  df-lim 6328  df-fun 6500  df-fn 6501  df-f 6502  df-f1 6503  df-fo 6504  df-f1o 6505  df-om 7818  df-en 8894  df-fin 8897
This theorem is referenced by:  pwfin0  45493
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