Theorem elpw2 3911

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 3910	. 2 |- ( B e. _V -> ( A e. ~P B <-> A C_ B ) )
3	1, 2	ax-mp 7	1 |- ( A e. ~P B <-> A C_ B )

Syntax hints:   <-> wb 98   e. wcel 1393   _Vcvv 2557   C_ wss 2917   ~Pcpw 3359

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-sep 3875

This theorem depends on definitions:  df-bi 110  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-v 2559  df-in 2924  df-ss 2931  df-pw 3361

This theorem is referenced by:  axpweq  3924  genpelxp  6609  ltexprlempr  6706  recexprlempr  6730  cauappcvgprlemcl  6751  cauappcvgprlemladd  6756  caucvgprlemcl  6774  caucvgprprlemcl  6802  uzf  8476  ixxf  8767  fzf  8878