Theorem elpw2 4293

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 4292	. 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 )

This proof depends on syntax axioms:   <-> wb 105   e. wcel 2209   _Vcvv 2821   C_ wss 3220   ~Pcpw 3688

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-sep 4249

This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-in 3226  df-ss 3233  df-pw 3690

This theorem is used by:  elpwi2  4294  axpweq  4308  genpelxp  7879  ltexprlempr  7976  recexprlempr  8000  cauappcvgprlemcl  8021  cauappcvgprlemladd  8026  caucvgprlemcl  8044  caucvgprprlemcl  8072  uzf  9934  ixxf  10311  fzf  10426  cncfval  15764  reldvg  15871  dvfvalap  15873  plyval  15924