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Theorem amosym1 32425
Description: A symmetry with  E*.

See negsym1 32416 for more information. (Contributed by Anthony Hart, 13-Sep-2011.)

Assertion
Ref Expression
amosym1  |-  ( E* x E* x F.  ->  E* x ph )

Proof of Theorem amosym1
StepHypRef Expression
1 df-mo 2475 . 2  |-  ( E* x E* x F.  <->  ( E. x E* x F.  ->  E! x E* x F.  ) )
2 mof 32409 . . . . 5  |-  E* x F.
3 19.8a 2052 . . . . . 6  |-  ( E* x F.  ->  E. x E* x F.  )
43notnotd 138 . . . . 5  |-  ( E* x F.  ->  -.  -.  E. x E* x F.  )
52, 4ax-mp 5 . . . 4  |-  -.  -.  E. x E* x F.
65pm2.21i 116 . . 3  |-  ( -. 
E. x E* x F.  ->  E* x ph )
72notnoti 137 . . . . . 6  |-  -.  -.  E* x F.
87nex 1731 . . . . 5  |-  -.  E. x  -.  E* x F.
9 eunex 4859 . . . . 5  |-  ( E! x E* x F.  ->  E. x  -.  E* x F.  )
108, 9mto 188 . . . 4  |-  -.  E! x E* x F.
1110pm2.21i 116 . . 3  |-  ( E! x E* x F.  ->  E* x ph )
126, 11ja 173 . 2  |-  ( ( E. x E* x F.  ->  E! x E* x F.  )  ->  E* x ph )
131, 12sylbi 207 1  |-  ( E* x E* x F.  ->  E* x ph )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    -> wi 4   F. wfal 1488   E.wex 1704   E!weu 2470   E*wmo 2471
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-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-nul 4789  ax-pow 4843
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-tru 1486  df-fal 1489  df-ex 1705  df-nf 1710  df-eu 2474  df-mo 2475
This theorem is referenced by: (None)
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