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Theorem f1opr 26417
Description: Condition for an operation to be one-to-one. (Contributed by Jeff Madsen, 17-Jun-2010.)
Assertion
Ref Expression
f1opr  |-  ( F : ( A  X.  B ) -1-1-> C  <->  ( F : ( A  X.  B ) --> C  /\  A. r  e.  A  A. s  e.  B  A. t  e.  A  A. u  e.  B  (
( r F s )  =  ( t F u )  -> 
( r  =  t  /\  s  =  u ) ) ) )
Distinct variable groups:    A, r,
s, t, u    B, r, s, t, u    F, r, s, t, u
Allowed substitution hints:    C( u, t, s, r)

Proof of Theorem f1opr
Dummy variables  v  w are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 dff13 5996 . 2  |-  ( F : ( A  X.  B ) -1-1-> C  <->  ( F : ( A  X.  B ) --> C  /\  A. v  e.  ( A  X.  B ) A. w  e.  ( A  X.  B ) ( ( F `  v )  =  ( F `  w )  ->  v  =  w ) ) )
2 fveq2 5720 . . . . . . . . 9  |-  ( v  =  <. r ,  s
>.  ->  ( F `  v )  =  ( F `  <. r ,  s >. )
)
3 df-ov 6076 . . . . . . . . 9  |-  ( r F s )  =  ( F `  <. r ,  s >. )
42, 3syl6eqr 2485 . . . . . . . 8  |-  ( v  =  <. r ,  s
>.  ->  ( F `  v )  =  ( r F s ) )
54eqeq1d 2443 . . . . . . 7  |-  ( v  =  <. r ,  s
>.  ->  ( ( F `
 v )  =  ( F `  w
)  <->  ( r F s )  =  ( F `  w ) ) )
6 eqeq1 2441 . . . . . . 7  |-  ( v  =  <. r ,  s
>.  ->  ( v  =  w  <->  <. r ,  s
>.  =  w )
)
75, 6imbi12d 312 . . . . . 6  |-  ( v  =  <. r ,  s
>.  ->  ( ( ( F `  v )  =  ( F `  w )  ->  v  =  w )  <->  ( (
r F s )  =  ( F `  w )  ->  <. r ,  s >.  =  w ) ) )
87ralbidv 2717 . . . . 5  |-  ( v  =  <. r ,  s
>.  ->  ( A. w  e.  ( A  X.  B
) ( ( F `
 v )  =  ( F `  w
)  ->  v  =  w )  <->  A. w  e.  ( A  X.  B
) ( ( r F s )  =  ( F `  w
)  ->  <. r ,  s >.  =  w
) ) )
98ralxp 5008 . . . 4  |-  ( A. v  e.  ( A  X.  B ) A. w  e.  ( A  X.  B
) ( ( F `
 v )  =  ( F `  w
)  ->  v  =  w )  <->  A. r  e.  A  A. s  e.  B  A. w  e.  ( A  X.  B
) ( ( r F s )  =  ( F `  w
)  ->  <. r ,  s >.  =  w
) )
10 fveq2 5720 . . . . . . . . 9  |-  ( w  =  <. t ,  u >.  ->  ( F `  w )  =  ( F `  <. t ,  u >. ) )
11 df-ov 6076 . . . . . . . . 9  |-  ( t F u )  =  ( F `  <. t ,  u >. )
1210, 11syl6eqr 2485 . . . . . . . 8  |-  ( w  =  <. t ,  u >.  ->  ( F `  w )  =  ( t F u ) )
1312eqeq2d 2446 . . . . . . 7  |-  ( w  =  <. t ,  u >.  ->  ( ( r F s )  =  ( F `  w
)  <->  ( r F s )  =  ( t F u ) ) )
14 eqeq2 2444 . . . . . . . 8  |-  ( w  =  <. t ,  u >.  ->  ( <. r ,  s >.  =  w  <->  <. r ,  s >.  =  <. t ,  u >. ) )
15 vex 2951 . . . . . . . . 9  |-  r  e. 
_V
16 vex 2951 . . . . . . . . 9  |-  s  e. 
_V
1715, 16opth 4427 . . . . . . . 8  |-  ( <.
r ,  s >.  =  <. t ,  u >.  <-> 
( r  =  t  /\  s  =  u ) )
1814, 17syl6bb 253 . . . . . . 7  |-  ( w  =  <. t ,  u >.  ->  ( <. r ,  s >.  =  w  <-> 
( r  =  t  /\  s  =  u ) ) )
1913, 18imbi12d 312 . . . . . 6  |-  ( w  =  <. t ,  u >.  ->  ( ( ( r F s )  =  ( F `  w )  ->  <. r ,  s >.  =  w )  <->  ( ( r F s )  =  ( t F u )  ->  ( r  =  t  /\  s  =  u ) ) ) )
2019ralxp 5008 . . . . 5  |-  ( A. w  e.  ( A  X.  B ) ( ( r F s )  =  ( F `  w )  ->  <. r ,  s >.  =  w )  <->  A. t  e.  A  A. u  e.  B  ( ( r F s )  =  ( t F u )  ->  ( r  =  t  /\  s  =  u ) ) )
21202ralbii 2723 . . . 4  |-  ( A. r  e.  A  A. s  e.  B  A. w  e.  ( A  X.  B ) ( ( r F s )  =  ( F `  w )  ->  <. r ,  s >.  =  w )  <->  A. r  e.  A  A. s  e.  B  A. t  e.  A  A. u  e.  B  ( ( r F s )  =  ( t F u )  ->  ( r  =  t  /\  s  =  u ) ) )
229, 21bitri 241 . . 3  |-  ( A. v  e.  ( A  X.  B ) A. w  e.  ( A  X.  B
) ( ( F `
 v )  =  ( F `  w
)  ->  v  =  w )  <->  A. r  e.  A  A. s  e.  B  A. t  e.  A  A. u  e.  B  ( (
r F s )  =  ( t F u )  ->  (
r  =  t  /\  s  =  u )
) )
2322anbi2i 676 . 2  |-  ( ( F : ( A  X.  B ) --> C  /\  A. v  e.  ( A  X.  B
) A. w  e.  ( A  X.  B
) ( ( F `
 v )  =  ( F `  w
)  ->  v  =  w ) )  <->  ( F : ( A  X.  B ) --> C  /\  A. r  e.  A  A. s  e.  B  A. t  e.  A  A. u  e.  B  (
( r F s )  =  ( t F u )  -> 
( r  =  t  /\  s  =  u ) ) ) )
241, 23bitri 241 1  |-  ( F : ( A  X.  B ) -1-1-> C  <->  ( F : ( A  X.  B ) --> C  /\  A. r  e.  A  A. s  e.  B  A. t  e.  A  A. u  e.  B  (
( r F s )  =  ( t F u )  -> 
( r  =  t  /\  s  =  u ) ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 177    /\ wa 359    = wceq 1652   A.wral 2697   <.cop 3809    X. cxp 4868   -->wf 5442   -1-1->wf1 5443   ` cfv 5446  (class class class)co 6073
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-14 1729  ax-6 1744  ax-7 1749  ax-11 1761  ax-12 1950  ax-ext 2416  ax-sep 4322  ax-nul 4330  ax-pr 4395
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1328  df-ex 1551  df-nf 1554  df-sb 1659  df-eu 2284  df-mo 2285  df-clab 2422  df-cleq 2428  df-clel 2431  df-nfc 2560  df-ne 2600  df-ral 2702  df-rex 2703  df-rab 2706  df-v 2950  df-sbc 3154  df-csb 3244  df-dif 3315  df-un 3317  df-in 3319  df-ss 3326  df-nul 3621  df-if 3732  df-sn 3812  df-pr 3813  df-op 3815  df-uni 4008  df-iun 4087  df-br 4205  df-opab 4259  df-id 4490  df-xp 4876  df-rel 4877  df-cnv 4878  df-co 4879  df-dm 4880  df-iota 5410  df-fun 5448  df-fn 5449  df-f 5450  df-f1 5451  df-fv 5454  df-ov 6076
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