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Theorem elnp 9354
Description: Membership in positive reals. (Contributed by NM, 16-Feb-1996.) (New usage is discouraged.)
Assertion
Ref Expression
elnp  |-  ( A  e.  P.  <->  ( ( (/)  C.  A  /\  A  C.  Q. )  /\  A. x  e.  A  ( A. y ( y  <Q  x  ->  y  e.  A
)  /\  E. y  e.  A  x  <Q  y ) ) )
Distinct variable group:    x, y, A

Proof of Theorem elnp
Dummy variable  z is distinct from all other variables.
StepHypRef Expression
1 elex 3115 . 2  |-  ( A  e.  P.  ->  A  e.  _V )
2 pssss 3585 . . . 4  |-  ( A 
C.  Q.  ->  A  C_  Q. )
3 nqex 9290 . . . . 5  |-  Q.  e.  _V
43ssex 4581 . . . 4  |-  ( A 
C_  Q.  ->  A  e. 
_V )
52, 4syl 16 . . 3  |-  ( A 
C.  Q.  ->  A  e. 
_V )
65ad2antlr 724 . 2  |-  ( ( ( (/)  C.  A  /\  A  C.  Q. )  /\  A. x  e.  A  ( A. y ( y 
<Q  x  ->  y  e.  A )  /\  E. y  e.  A  x  <Q  y ) )  ->  A  e.  _V )
7 psseq2 3578 . . . . 5  |-  ( z  =  A  ->  ( (/)  C.  z  <->  (/)  C.  A )
)
8 psseq1 3577 . . . . 5  |-  ( z  =  A  ->  (
z  C.  Q.  <->  A  C.  Q. )
)
97, 8anbi12d 708 . . . 4  |-  ( z  =  A  ->  (
( (/)  C.  z  /\  z  C.  Q. )  <->  ( (/)  C.  A  /\  A  C.  Q. )
) )
10 eleq2 2527 . . . . . . . 8  |-  ( z  =  A  ->  (
y  e.  z  <->  y  e.  A ) )
1110imbi2d 314 . . . . . . 7  |-  ( z  =  A  ->  (
( y  <Q  x  ->  y  e.  z )  <-> 
( y  <Q  x  ->  y  e.  A ) ) )
1211albidv 1718 . . . . . 6  |-  ( z  =  A  ->  ( A. y ( y  <Q  x  ->  y  e.  z )  <->  A. y ( y 
<Q  x  ->  y  e.  A ) ) )
13 rexeq 3052 . . . . . 6  |-  ( z  =  A  ->  ( E. y  e.  z  x  <Q  y  <->  E. y  e.  A  x  <Q  y ) )
1412, 13anbi12d 708 . . . . 5  |-  ( z  =  A  ->  (
( A. y ( y  <Q  x  ->  y  e.  z )  /\  E. y  e.  z  x 
<Q  y )  <->  ( A. y ( y  <Q  x  ->  y  e.  A
)  /\  E. y  e.  A  x  <Q  y ) ) )
1514raleqbi1dv 3059 . . . 4  |-  ( z  =  A  ->  ( A. x  e.  z 
( A. y ( y  <Q  x  ->  y  e.  z )  /\  E. y  e.  z  x 
<Q  y )  <->  A. x  e.  A  ( A. y ( y  <Q  x  ->  y  e.  A
)  /\  E. y  e.  A  x  <Q  y ) ) )
169, 15anbi12d 708 . . 3  |-  ( z  =  A  ->  (
( ( (/)  C.  z  /\  z  C.  Q. )  /\  A. x  e.  z  ( A. y ( y  <Q  x  ->  y  e.  z )  /\  E. y  e.  z  x 
<Q  y ) )  <->  ( ( (/)  C.  A  /\  A  C.  Q. )  /\  A. x  e.  A  ( A. y ( y  <Q  x  ->  y  e.  A
)  /\  E. y  e.  A  x  <Q  y ) ) ) )
17 df-np 9348 . . 3  |-  P.  =  { z  |  ( ( (/)  C.  z  /\  z  C.  Q. )  /\  A. x  e.  z  ( A. y ( y 
<Q  x  ->  y  e.  z )  /\  E. y  e.  z  x  <Q  y ) ) }
1816, 17elab2g 3245 . 2  |-  ( A  e.  _V  ->  ( A  e.  P.  <->  ( ( (/)  C.  A  /\  A  C.  Q. )  /\  A. x  e.  A  ( A. y ( y  <Q  x  ->  y  e.  A
)  /\  E. y  e.  A  x  <Q  y ) ) ) )
191, 6, 18pm5.21nii 351 1  |-  ( A  e.  P.  <->  ( ( (/)  C.  A  /\  A  C.  Q. )  /\  A. x  e.  A  ( A. y ( y  <Q  x  ->  y  e.  A
)  /\  E. y  e.  A  x  <Q  y ) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    <-> wb 184    /\ wa 367   A.wal 1396    = wceq 1398    e. wcel 1823   A.wral 2804   E.wrex 2805   _Vcvv 3106    C_ wss 3461    C. wpss 3462   (/)c0 3783   class class class wbr 4439   Q.cnq 9219    <Q cltq 9225   P.cnp 9226
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1623  ax-4 1636  ax-5 1709  ax-6 1752  ax-7 1795  ax-8 1825  ax-9 1827  ax-10 1842  ax-11 1847  ax-12 1859  ax-13 2004  ax-ext 2432  ax-sep 4560  ax-nul 4568  ax-pow 4615  ax-pr 4676  ax-un 6565  ax-inf2 8049
This theorem depends on definitions:  df-bi 185  df-or 368  df-an 369  df-3or 972  df-3an 973  df-tru 1401  df-ex 1618  df-nf 1622  df-sb 1745  df-eu 2288  df-mo 2289  df-clab 2440  df-cleq 2446  df-clel 2449  df-nfc 2604  df-ne 2651  df-ral 2809  df-rex 2810  df-rab 2813  df-v 3108  df-sbc 3325  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-pss 3477  df-nul 3784  df-if 3930  df-pw 4001  df-sn 4017  df-pr 4019  df-tp 4021  df-op 4023  df-uni 4236  df-br 4440  df-opab 4498  df-tr 4533  df-eprel 4780  df-po 4789  df-so 4790  df-fr 4827  df-we 4829  df-ord 4870  df-on 4871  df-lim 4872  df-suc 4873  df-xp 4994  df-om 6674  df-ni 9239  df-nq 9279  df-np 9348
This theorem is referenced by:  genpcl  9375  nqpr  9381  ltexprlem5  9407  reclem2pr  9415  suplem1pr  9419
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