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Theorem addnqf 8719
Description: Domain of addition on positive fractions. (Contributed by NM, 24-Aug-1995.) (Revised by Mario Carneiro, 10-Jul-2014.) (New usage is discouraged.)
Assertion
Ref Expression
addnqf  |-  +Q  :
( Q.  X.  Q. )
--> Q.

Proof of Theorem addnqf
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 nqerf 8701 . . . 4  |-  /Q :
( N.  X.  N. )
--> Q.
2 addpqf 8715 . . . 4  |-  +pQ  :
( ( N.  X.  N. )  X.  ( N.  X.  N. ) ) --> ( N.  X.  N. )
3 fco 5504 . . . 4  |-  ( ( /Q : ( N. 
X.  N. ) --> Q.  /\  +pQ 
: ( ( N. 
X.  N. )  X.  ( N.  X.  N. ) ) --> ( N.  X.  N. ) )  ->  ( /Q  o.  +pQ  ) :
( ( N.  X.  N. )  X.  ( N.  X.  N. ) ) --> Q. )
41, 2, 3mp2an 653 . . 3  |-  ( /Q  o.  +pQ  ) :
( ( N.  X.  N. )  X.  ( N.  X.  N. ) ) --> Q.
5 elpqn 8696 . . . . 5  |-  ( x  e.  Q.  ->  x  e.  ( N.  X.  N. ) )
65ssriv 3270 . . . 4  |-  Q.  C_  ( N.  X.  N. )
7 xpss12 4895 . . . 4  |-  ( ( Q.  C_  ( N.  X.  N. )  /\  Q.  C_  ( N.  X.  N. ) )  ->  ( Q.  X.  Q. )  C_  ( ( N.  X.  N. )  X.  ( N.  X.  N. ) ) )
86, 6, 7mp2an 653 . . 3  |-  ( Q. 
X.  Q. )  C_  (
( N.  X.  N. )  X.  ( N.  X.  N. ) )
9 fssres 5514 . . 3  |-  ( ( ( /Q  o.  +pQ  ) : ( ( N. 
X.  N. )  X.  ( N.  X.  N. ) ) --> Q.  /\  ( Q. 
X.  Q. )  C_  (
( N.  X.  N. )  X.  ( N.  X.  N. ) ) )  -> 
( ( /Q  o.  +pQ  )  |`  ( Q. 
X.  Q. ) ) : ( Q.  X.  Q. )
--> Q. )
104, 8, 9mp2an 653 . 2  |-  ( ( /Q  o.  +pQ  )  |`  ( Q.  X.  Q. ) ) : ( Q.  X.  Q. ) --> Q.
11 df-plq 8685 . . 3  |-  +Q  =  ( ( /Q  o.  +pQ  )  |`  ( Q. 
X.  Q. ) )
1211feq1i 5489 . 2  |-  (  +Q  : ( Q.  X.  Q. ) --> Q.  <->  ( ( /Q  o.  +pQ  )  |`  ( Q.  X.  Q. ) ) : ( Q.  X.  Q. ) --> Q. )
1310, 12mpbir 200 1  |-  +Q  :
( Q.  X.  Q. )
--> Q.
Colors of variables: wff set class
Syntax hints:    C_ wss 3238    X. cxp 4790    |` cres 4794    o. ccom 4796   -->wf 5354   N.cnpi 8613    +pQ cplpq 8617   Q.cnq 8621   /Qcerq 8623    +Q cplq 8624
This theorem is referenced by:  addcomnq  8722  adderpq  8727  addassnq  8729  distrnq  8732  ltanq  8742  ltexnq  8746  nsmallnq  8748  ltbtwnnq  8749  prlem934  8804  ltaddpr  8805  ltexprlem2  8808  ltexprlem3  8809  ltexprlem4  8810  ltexprlem6  8812  ltexprlem7  8813  prlem936  8818
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1551  ax-5 1562  ax-17 1621  ax-9 1659  ax-8 1680  ax-13 1717  ax-14 1719  ax-6 1734  ax-7 1739  ax-11 1751  ax-12 1937  ax-ext 2347  ax-sep 4243  ax-nul 4251  ax-pow 4290  ax-pr 4316  ax-un 4615
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 936  df-3an 937  df-tru 1324  df-ex 1547  df-nf 1550  df-sb 1654  df-eu 2221  df-mo 2222  df-clab 2353  df-cleq 2359  df-clel 2362  df-nfc 2491  df-ne 2531  df-ral 2633  df-rex 2634  df-reu 2635  df-rmo 2636  df-rab 2637  df-v 2875  df-sbc 3078  df-csb 3168  df-dif 3241  df-un 3243  df-in 3245  df-ss 3252  df-pss 3254  df-nul 3544  df-if 3655  df-pw 3716  df-sn 3735  df-pr 3736  df-tp 3737  df-op 3738  df-uni 3930  df-iun 4009  df-br 4126  df-opab 4180  df-mpt 4181  df-tr 4216  df-eprel 4408  df-id 4412  df-po 4417  df-so 4418  df-fr 4455  df-we 4457  df-ord 4498  df-on 4499  df-lim 4500  df-suc 4501  df-om 4760  df-xp 4798  df-rel 4799  df-cnv 4800  df-co 4801  df-dm 4802  df-rn 4803  df-res 4804  df-ima 4805  df-iota 5322  df-fun 5360  df-fn 5361  df-f 5362  df-f1 5363  df-fo 5364  df-f1o 5365  df-fv 5366  df-ov 5984  df-oprab 5985  df-mpt2 5986  df-1st 6249  df-2nd 6250  df-recs 6530  df-rdg 6565  df-1o 6621  df-oadd 6625  df-omul 6626  df-er 6802  df-ni 8643  df-pli 8644  df-mi 8645  df-lti 8646  df-plpq 8679  df-enq 8682  df-nq 8683  df-erq 8684  df-plq 8685  df-1nq 8687
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