Theorem elpw2 4274

Description: Membership in a power class. Theorem 86 of [Suppes] p. 47. (Contributed by NM, 11-Oct-2007.)

Hypothesis

Ref	Expression
elpw2.1	|- B e. _V

Assertion

Ref	Expression
elpw2	|- ( A e. ~P B <-> A C_ B )

Proof of Theorem elpw2

Step	Hyp	Ref	Expression
1		elpw2.1	. 2 |- B e. _V
2		elpw2g 4273	. 2 |- ( B e. _V -> ( A e. ~P B <-> A C_ B ) )
3	1, 2	ax-mp 5	1 |- ( A e. ~P B <-> A C_ B )

Syntax hints:   <-> wb 105   e. wcel 2205   _Vcvv 2815   C_ wss 3214   ~Pcpw 3674

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216  ax-sep 4233

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-v 2817  df-in 3220  df-ss 3227  df-pw 3676

This theorem is referenced by:  elpwi2  4275  axpweq  4289  genpelxp  7842  ltexprlempr  7939  recexprlempr  7963  cauappcvgprlemcl  7984  cauappcvgprlemladd  7989  caucvgprlemcl  8007  caucvgprprlemcl  8035  uzf  9877  ixxf  10253  fzf  10368  cncfval  15566  reldvg  15673  dvfvalap  15675  plyval  15726