Theorem pw2en 8623

Description: The power set of a set is equinumerous to set exponentiation with a base of ordinal 2. Proposition 10.44 of [TakeutiZaring] p. 96. This is Metamath 100 proof #52. (Contributed by NM, 29-Jan-2004.) (Proof shortened by Mario Carneiro, 1-Jul-2015.)

Hypothesis

Ref	Expression
pw2en.1	⊢ 𝐴 ∈ V

Assertion

Ref	Expression
pw2en	⊢ 𝒫 𝐴 ≈ (2o ↑m 𝐴)

Proof of Theorem pw2en

Step	Hyp	Ref	Expression
1		pw2en.1	. 2 ⊢ 𝐴 ∈ V
2		pw2eng 8622	. 2 ⊢ (𝐴 ∈ V → 𝒫 𝐴 ≈ (2o ↑m 𝐴))
3	1, 2	ax-mp 5	1 ⊢ 𝒫 𝐴 ≈ (2o ↑m 𝐴)

Syntax hints:   ∈ wcel 2110  Vcvv 3494  𝒫 cpw 4538   class class class wbr 5065  (class class class)co 7155  2_oc2o 8095   ↑_m cmap 8405   ≈ cen 8505

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-sep 5202  ax-nul 5209  ax-pow 5265  ax-pr 5329  ax-un 7460

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-sbc 3772  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4838  df-br 5066  df-opab 5128  df-mpt 5146  df-id 5459  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567  df-suc 6196  df-iota 6313  df-fun 6356  df-fn 6357  df-f 6358  df-f1 6359  df-fo 6360  df-f1o 6361  df-fv 6362  df-ov 7158  df-oprab 7159  df-mpo 7160  df-1o 8101  df-2o 8102  df-map 8407  df-en 8509

This theorem is referenced by:  aleph1  9992  alephexp1  10000  pwcfsdom  10004  cfpwsdom  10005  hashpw  13796  rpnnen  15579  rexpen  15580