MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  spc3gv Structured version   Visualization version   Unicode version

Theorem spc3gv 3298
Description: Specialization with three quantifiers, using implicit substitution. (Contributed by NM, 12-May-2008.)
Hypothesis
Ref Expression
spc3egv.1  |-  ( ( x  =  A  /\  y  =  B  /\  z  =  C )  ->  ( ph  <->  ps )
)
Assertion
Ref Expression
spc3gv  |-  ( ( A  e.  V  /\  B  e.  W  /\  C  e.  X )  ->  ( A. x A. y A. z ph  ->  ps ) )
Distinct variable groups:    x, y,
z, A    x, B, y, z    x, C, y, z    ps, x, y, z
Allowed substitution hints:    ph( x, y, z)    V( x, y, z)    W( x, y, z)    X( x, y, z)

Proof of Theorem spc3gv
StepHypRef Expression
1 spc3egv.1 . . . . 5  |-  ( ( x  =  A  /\  y  =  B  /\  z  =  C )  ->  ( ph  <->  ps )
)
21notbid 308 . . . 4  |-  ( ( x  =  A  /\  y  =  B  /\  z  =  C )  ->  ( -.  ph  <->  -.  ps )
)
32spc3egv 3297 . . 3  |-  ( ( A  e.  V  /\  B  e.  W  /\  C  e.  X )  ->  ( -.  ps  ->  E. x E. y E. z  -.  ph )
)
4 exnal 1754 . . . . . . 7  |-  ( E. z  -.  ph  <->  -.  A. z ph )
54exbii 1774 . . . . . 6  |-  ( E. y E. z  -. 
ph 
<->  E. y  -.  A. z ph )
6 exnal 1754 . . . . . 6  |-  ( E. y  -.  A. z ph 
<->  -.  A. y A. z ph )
75, 6bitri 264 . . . . 5  |-  ( E. y E. z  -. 
ph 
<->  -.  A. y A. z ph )
87exbii 1774 . . . 4  |-  ( E. x E. y E. z  -.  ph  <->  E. x  -.  A. y A. z ph )
9 exnal 1754 . . . 4  |-  ( E. x  -.  A. y A. z ph  <->  -.  A. x A. y A. z ph )
108, 9bitr2i 265 . . 3  |-  ( -. 
A. x A. y A. z ph  <->  E. x E. y E. z  -. 
ph )
113, 10syl6ibr 242 . 2  |-  ( ( A  e.  V  /\  B  e.  W  /\  C  e.  X )  ->  ( -.  ps  ->  -. 
A. x A. y A. z ph ) )
1211con4d 114 1  |-  ( ( A  e.  V  /\  B  e.  W  /\  C  e.  X )  ->  ( A. x A. y A. z ph  ->  ps ) )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 196    /\ w3a 1037   A.wal 1481    = wceq 1483   E.wex 1704    e. wcel 1990
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-ext 2602
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-clab 2609  df-cleq 2615  df-clel 2618  df-v 3202
This theorem is referenced by:  funopg  5922  pslem  17206  dirtr  17236  mclsax  31466  fununiq  31667
  Copyright terms: Public domain W3C validator