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Theorem sgplpte21a 26236
Description: The predicate "is a non-degenerated segment". (For my private use only. Don't use.) (Contributed by FL, 20-May-2016.)
Hypotheses
Ref Expression
sgplpte.1  |-  P  =  (PPoints `  G )
sgplpte.3  |-  S  =  ( seg `  G
)
sgplpte.4  |-  ( ph  ->  G  e. Ibg )
sgplpte.5  |-  ( ph  ->  X  e.  P )
sgplpte21a.2  |-  B  =  (btw `  G )
sgplpte21a.6  |-  ( ph  ->  Y  e.  P )
sgplpte21a.7  |-  ( ph  ->  X  =/=  Y )
Assertion
Ref Expression
sgplpte21a  |-  ( ph  ->  A. z ( z  e.  ( X S Y )  <->  ( z  e.  P  /\  (
z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y )
) ) )
Distinct variable groups:    z, P    z, S    z, X    z, Y    z, G    ph, z
Allowed substitution hint:    B( z)

Proof of Theorem sgplpte21a
StepHypRef Expression
1 sgplpte.1 . . 3  |-  P  =  (PPoints `  G )
2 sgplpte.3 . . 3  |-  S  =  ( seg `  G
)
3 sgplpte.4 . . 3  |-  ( ph  ->  G  e. Ibg )
4 sgplpte.5 . . 3  |-  ( ph  ->  X  e.  P )
5 sgplpte21a.2 . . 3  |-  B  =  (btw `  G )
6 sgplpte21a.6 . . 3  |-  ( ph  ->  Y  e.  P )
7 sgplpte21a.7 . . 3  |-  ( ph  ->  X  =/=  Y )
81, 2, 3, 4, 5, 6, 7sgplpte21 26235 . 2  |-  ( ph  ->  ( X S Y )  =  { z  e.  P  |  ( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) } )
9 nfcv 2432 . . . 4  |-  F/_ z
( X S Y )
10 nfrab1 2733 . . . 4  |-  F/_ z { z  e.  P  |  ( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) }
119, 10cleqf 2456 . . 3  |-  ( ( X S Y )  =  { z  e.  P  |  ( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) }  <->  A. z
( z  e.  ( X S Y )  <-> 
z  e.  { z  e.  P  |  ( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) } ) )
12 rabid 2729 . . . . . 6  |-  ( z  e.  { z  e.  P  |  ( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) }  <->  ( z  e.  P  /\  (
z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y )
) )
1312a1i 10 . . . . 5  |-  ( ph  ->  ( z  e.  {
z  e.  P  | 
( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) }  <->  ( z  e.  P  /\  (
z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y )
) ) )
1413bibi2d 309 . . . 4  |-  ( ph  ->  ( ( z  e.  ( X S Y )  <->  z  e.  {
z  e.  P  | 
( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) } )  <->  ( z  e.  ( X S Y )  <->  ( z  e.  P  /\  ( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) ) ) ) )
1514albidv 1615 . . 3  |-  ( ph  ->  ( A. z ( z  e.  ( X S Y )  <->  z  e.  { z  e.  P  | 
( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) } )  <->  A. z
( z  e.  ( X S Y )  <-> 
( z  e.  P  /\  ( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) ) ) ) )
1611, 15syl5bb 248 . 2  |-  ( ph  ->  ( ( X S Y )  =  {
z  e.  P  | 
( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) }  <->  A. z
( z  e.  ( X S Y )  <-> 
( z  e.  P  /\  ( z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y ) ) ) ) )
178, 16mpbid 201 1  |-  ( ph  ->  A. z ( z  e.  ( X S Y )  <->  ( z  e.  P  /\  (
z  e.  ( X B Y )  \/  z  =  X  \/  z  =  Y )
) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 176    /\ wa 358    \/ w3o 933   A.wal 1530    = wceq 1632    e. wcel 1696    =/= wne 2459   {crab 2560   ` cfv 5271  (class class class)co 5874  PPointscpoints 26159  btwcbtw 26209  Ibgcibg 26210   segcseg 26233
This theorem is referenced by:  sgplpte21b  26237
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1536  ax-5 1547  ax-17 1606  ax-9 1644  ax-8 1661  ax-13 1698  ax-14 1700  ax-6 1715  ax-7 1720  ax-11 1727  ax-12 1878  ax-ext 2277  ax-rep 4147  ax-sep 4157  ax-nul 4165  ax-pow 4204  ax-pr 4230  ax-un 4528
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-tru 1310  df-ex 1532  df-nf 1535  df-sb 1639  df-eu 2160  df-mo 2161  df-clab 2283  df-cleq 2289  df-clel 2292  df-nfc 2421  df-ne 2461  df-ral 2561  df-rex 2562  df-reu 2563  df-rab 2565  df-v 2803  df-sbc 3005  df-csb 3095  df-dif 3168  df-un 3170  df-in 3172  df-ss 3179  df-nul 3469  df-if 3579  df-pw 3640  df-sn 3659  df-pr 3660  df-op 3662  df-uni 3844  df-iun 3923  df-br 4040  df-opab 4094  df-mpt 4095  df-id 4325  df-xp 4711  df-rel 4712  df-cnv 4713  df-co 4714  df-dm 4715  df-rn 4716  df-res 4717  df-ima 4718  df-iota 5235  df-fun 5273  df-fn 5274  df-f 5275  df-f1 5276  df-fo 5277  df-f1o 5278  df-fv 5279  df-ov 5877  df-oprab 5878  df-mpt2 5879  df-1st 6138  df-2nd 6139  df-seg2 26234
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