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Theorem linecom 24134
Description: Commutativity law for lines. Part of theorem 6.17 of [Schwabhauser] p. 45. (Contributed by Scott Fenton, 28-Oct-2013.) (Revised by Mario Carneiro, 19-Apr-2014.)
Assertion
Ref Expression
linecom  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q ) )  -> 
( PLine Q )  =  ( QLine P
) )

Proof of Theorem linecom
StepHypRef Expression
1 simp1 960 . . . . 5  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q )  /\  x  e.  ( EE `  N
) )  ->  N  e.  NN )
2 simp3 962 . . . . 5  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q )  /\  x  e.  ( EE `  N
) )  ->  x  e.  ( EE `  N
) )
3 simp21 993 . . . . 5  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q )  /\  x  e.  ( EE `  N
) )  ->  P  e.  ( EE `  N
) )
4 simp22 994 . . . . 5  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q )  /\  x  e.  ( EE `  N
) )  ->  Q  e.  ( EE `  N
) )
5 colinearperm1 24046 . . . . 5  |-  ( ( N  e.  NN  /\  ( x  e.  ( EE `  N )  /\  P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N
) ) )  -> 
( x  Colinear  <. P ,  Q >. 
<->  x  Colinear  <. Q ,  P >. ) )
61, 2, 3, 4, 5syl13anc 1189 . . . 4  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q )  /\  x  e.  ( EE `  N
) )  ->  (
x  Colinear  <. P ,  Q >.  <-> 
x  Colinear  <. Q ,  P >. ) )
763expa 1156 . . 3  |-  ( ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q
) )  /\  x  e.  ( EE `  N
) )  ->  (
x  Colinear  <. P ,  Q >.  <-> 
x  Colinear  <. Q ,  P >. ) )
87rabbidva 2748 . 2  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q ) )  ->  { x  e.  ( EE `  N )  |  x  Colinear  <. P ,  Q >. }  =  { x  e.  ( EE `  N
)  |  x  Colinear  <. Q ,  P >. } )
9 fvline2 24130 . 2  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q ) )  -> 
( PLine Q )  =  { x  e.  ( EE `  N
)  |  x  Colinear  <. P ,  Q >. } )
10 necom 2500 . . . . 5  |-  ( P  =/=  Q  <->  Q  =/=  P )
11103anbi3i 1149 . . . 4  |-  ( ( P  e.  ( EE
`  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q )  <->  ( P  e.  ( EE `  N
)  /\  Q  e.  ( EE `  N )  /\  Q  =/=  P
) )
12 3ancoma 946 . . . 4  |-  ( ( P  e.  ( EE
`  N )  /\  Q  e.  ( EE `  N )  /\  Q  =/=  P )  <->  ( Q  e.  ( EE `  N
)  /\  P  e.  ( EE `  N )  /\  Q  =/=  P
) )
1311, 12bitri 242 . . 3  |-  ( ( P  e.  ( EE
`  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q )  <->  ( Q  e.  ( EE `  N
)  /\  P  e.  ( EE `  N )  /\  Q  =/=  P
) )
14 fvline2 24130 . . 3  |-  ( ( N  e.  NN  /\  ( Q  e.  ( EE `  N )  /\  P  e.  ( EE `  N )  /\  Q  =/=  P ) )  -> 
( QLine P )  =  { x  e.  ( EE `  N
)  |  x  Colinear  <. Q ,  P >. } )
1513, 14sylan2b 463 . 2  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q ) )  -> 
( QLine P )  =  { x  e.  ( EE `  N
)  |  x  Colinear  <. Q ,  P >. } )
168, 9, 153eqtr4d 2298 1  |-  ( ( N  e.  NN  /\  ( P  e.  ( EE `  N )  /\  Q  e.  ( EE `  N )  /\  P  =/=  Q ) )  -> 
( PLine Q )  =  ( QLine P
) )
Colors of variables: wff set class
Syntax hints:    -> wi 6    <-> wb 178    /\ wa 360    /\ w3a 939    = wceq 1619    e. wcel 1621    =/= wne 2419   {crab 2520   <.cop 3603   class class class wbr 3983   ` cfv 4659  (class class class)co 5778   NNcn 9700   EEcee 23877    Colinear ccolin 24021  Linecline2 24118
This theorem is referenced by:  linerflx2  24135  linethru  24137
This theorem was proved from axioms:  ax-1 7  ax-2 8  ax-3 9  ax-mp 10  ax-5 1533  ax-6 1534  ax-7 1535  ax-gen 1536  ax-8 1623  ax-11 1624  ax-13 1625  ax-14 1626  ax-17 1628  ax-12o 1664  ax-10 1678  ax-9 1684  ax-4 1692  ax-16 1927  ax-ext 2237  ax-rep 4091  ax-sep 4101  ax-nul 4109  ax-pow 4146  ax-pr 4172  ax-un 4470  ax-inf2 7296  ax-cnex 8747  ax-resscn 8748  ax-1cn 8749  ax-icn 8750  ax-addcl 8751  ax-addrcl 8752  ax-mulcl 8753  ax-mulrcl 8754  ax-mulcom 8755  ax-addass 8756  ax-mulass 8757  ax-distr 8758  ax-i2m1 8759  ax-1ne0 8760  ax-1rid 8761  ax-rnegex 8762  ax-rrecex 8763  ax-cnre 8764  ax-pre-lttri 8765  ax-pre-lttrn 8766  ax-pre-ltadd 8767  ax-pre-mulgt0 8768  ax-pre-sup 8769
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3or 940  df-3an 941  df-tru 1315  df-ex 1538  df-nf 1540  df-sb 1884  df-eu 2121  df-mo 2122  df-clab 2243  df-cleq 2249  df-clel 2252  df-nfc 2381  df-ne 2421  df-nel 2422  df-ral 2521  df-rex 2522  df-reu 2523  df-rmo 2524  df-rab 2525  df-v 2759  df-sbc 2953  df-csb 3043  df-dif 3116  df-un 3118  df-in 3120  df-ss 3127  df-pss 3129  df-nul 3417  df-if 3526  df-pw 3587  df-sn 3606  df-pr 3607  df-tp 3608  df-op 3609  df-uni 3788  df-int 3823  df-iun 3867  df-br 3984  df-opab 4038  df-mpt 4039  df-tr 4074  df-eprel 4263  df-id 4267  df-po 4272  df-so 4273  df-fr 4310  df-se 4311  df-we 4312  df-ord 4353  df-on 4354  df-lim 4355  df-suc 4356  df-om 4615  df-xp 4661  df-rel 4662  df-cnv 4663  df-co 4664  df-dm 4665  df-rn 4666  df-res 4667  df-ima 4668  df-fun 4669  df-fn 4670  df-f 4671  df-f1 4672  df-fo 4673  df-f1o 4674  df-fv 4675  df-isom 4676  df-ov 5781  df-oprab 5782  df-mpt2 5783  df-1st 6042  df-2nd 6043  df-iota 6211  df-riota 6258  df-recs 6342  df-rdg 6377  df-1o 6433  df-oadd 6437  df-er 6614  df-ec 6616  df-map 6728  df-en 6818  df-dom 6819  df-sdom 6820  df-fin 6821  df-sup 7148  df-oi 7179  df-card 7526  df-pnf 8823  df-mnf 8824  df-xr 8825  df-ltxr 8826  df-le 8827  df-sub 8993  df-neg 8994  df-div 9378  df-n 9701  df-2 9758  df-3 9759  df-n0 9919  df-z 9978  df-uz 10184  df-rp 10308  df-ico 10614  df-icc 10615  df-fz 10735  df-fzo 10823  df-seq 10999  df-exp 11057  df-hash 11290  df-cj 11535  df-re 11536  df-im 11537  df-sqr 11671  df-abs 11672  df-clim 11913  df-sum 12110  df-ee 23880  df-btwn 23881  df-cgr 23882  df-colinear 24025  df-line2 24121
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