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Theorem frege107 38264
Description: Proposition 107 of [Frege1879] p. 74. (Contributed by RP, 7-Jul-2020.) (Proof modification is discouraged.)
Hypothesis
Ref Expression
frege107.v  |-  V  e.  A
Assertion
Ref Expression
frege107  |-  ( ( Z ( ( t+ `  R )  u.  _I  ) Y  ->  ( Y R V  ->  Z (
t+ `  R
) V ) )  ->  ( Z ( ( t+ `  R )  u.  _I  ) Y  ->  ( Y R V  ->  Z
( ( t+ `  R )  u.  _I  ) V ) ) )

Proof of Theorem frege107
StepHypRef Expression
1 frege107.v . . 3  |-  V  e.  A
21frege106 38263 . 2  |-  ( Z ( t+ `  R ) V  ->  Z ( ( t+ `  R )  u.  _I  ) V )
3 frege7 38102 . 2  |-  ( ( Z ( t+ `  R ) V  ->  Z ( ( t+ `  R
)  u.  _I  ) V )  ->  (
( Z ( ( t+ `  R
)  u.  _I  ) Y  ->  ( Y R V  ->  Z (
t+ `  R
) V ) )  ->  ( Z ( ( t+ `  R )  u.  _I  ) Y  ->  ( Y R V  ->  Z
( ( t+ `  R )  u.  _I  ) V ) ) ) )
42, 3ax-mp 5 1  |-  ( ( Z ( ( t+ `  R )  u.  _I  ) Y  ->  ( Y R V  ->  Z (
t+ `  R
) V ) )  ->  ( Z ( ( t+ `  R )  u.  _I  ) Y  ->  ( Y R V  ->  Z
( ( t+ `  R )  u.  _I  ) V ) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    e. wcel 1990    u. cun 3572   class class class wbr 4653    _I cid 5023   ` cfv 5888   t+ctcl 13724
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-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906  ax-frege1 38084  ax-frege2 38085  ax-frege8 38103  ax-frege28 38124  ax-frege31 38128  ax-frege52a 38151
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-ifp 1013  df-3an 1039  df-tru 1486  df-fal 1489  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-id 5024  df-xp 5120  df-rel 5121
This theorem is referenced by:  frege108  38265
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