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Theorem a16gNEW7 29473
Description: Generalization of ax16 2129. (Contributed by NM, 25-Jul-2015.)
Assertion
Ref Expression
a16gNEW7  |-  ( A. x  x  =  y  ->  ( ph  ->  A. z ph ) )
Distinct variable group:    x, y
Allowed substitution hints:    ph( x, y, z)

Proof of Theorem a16gNEW7
Dummy variable  w is distinct from all other variables.
StepHypRef Expression
1 a9ev 1668 . 2  |-  E. w  w  =  z
2 ax10lem5NEW7 29399 . 2  |-  ( A. x  x  =  y  ->  A. w  w  =  z )
3 hbn1 1745 . . . . 5  |-  ( -. 
A. w  w  =  z  ->  A. w  -.  A. w  w  =  z )
4 pm2.21 102 . . . . 5  |-  ( -. 
A. w  w  =  z  ->  ( A. w  w  =  z  ->  ( ph  ->  A. z ph ) ) )
53, 4alrimih 1574 . . . 4  |-  ( -. 
A. w  w  =  z  ->  A. w
( A. w  w  =  z  ->  ( ph  ->  A. z ph )
) )
6 ax-17 1626 . . . . 5  |-  ( (
ph  ->  A. z ph )  ->  A. w ( ph  ->  A. z ph )
)
7 ax-1 5 . . . . 5  |-  ( (
ph  ->  A. z ph )  ->  ( A. w  w  =  z  ->  ( ph  ->  A. z ph )
) )
86, 7alrimih 1574 . . . 4  |-  ( (
ph  ->  A. z ph )  ->  A. w ( A. w  w  =  z  ->  ( ph  ->  A. z ph ) ) )
95, 8ja 155 . . 3  |-  ( ( A. w  w  =  z  ->  ( ph  ->  A. z ph )
)  ->  A. w
( A. w  w  =  z  ->  ( ph  ->  A. z ph )
) )
10 ax10lem5NEW7 29399 . . . 4  |-  ( A. w  w  =  z  ->  A. z  z  =  w )
11 equcomi 1691 . . . . . . 7  |-  ( w  =  z  ->  z  =  w )
12 ax-17 1626 . . . . . . 7  |-  ( ph  ->  A. w ph )
13 ax-11 1761 . . . . . . 7  |-  ( z  =  w  ->  ( A. w ph  ->  A. z
( z  =  w  ->  ph ) ) )
1411, 12, 13syl2im 36 . . . . . 6  |-  ( w  =  z  ->  ( ph  ->  A. z ( z  =  w  ->  ph )
) )
15 ax-5 1566 . . . . . 6  |-  ( A. z ( z  =  w  ->  ph )  -> 
( A. z  z  =  w  ->  A. z ph ) )
1614, 15syl6 31 . . . . 5  |-  ( w  =  z  ->  ( ph  ->  ( A. z 
z  =  w  ->  A. z ph ) ) )
1716com23 74 . . . 4  |-  ( w  =  z  ->  ( A. z  z  =  w  ->  ( ph  ->  A. z ph ) ) )
1810, 17syl5 30 . . 3  |-  ( w  =  z  ->  ( A. w  w  =  z  ->  ( ph  ->  A. z ph ) ) )
199, 18exlimih 1822 . 2  |-  ( E. w  w  =  z  ->  ( A. w  w  =  z  ->  (
ph  ->  A. z ph )
) )
201, 2, 19mpsyl 61 1  |-  ( A. x  x  =  y  ->  ( ph  ->  A. z ph ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4   A.wal 1549   E.wex 1550
This theorem is referenced by:  a16gbNEW7  29474  a16nfwAUX7  29475  ax16NEW7  29476  hbaew5AUX7  29576  ax7w18AUX7  29604
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1555  ax-5 1566  ax-17 1626  ax-9 1666  ax-8 1687  ax-6 1744  ax-11 1761  ax-12 1950  ax-7v 29369
This theorem depends on definitions:  df-bi 178  df-an 361  df-ex 1551  df-nf 1554
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