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Theorem cncfmptid 13954
Description: The identity function is a continuous function on  CC. (Contributed by Jeff Madsen, 11-Jun-2010.) (Revised by Mario Carneiro, 17-May-2016.)
Assertion
Ref Expression
cncfmptid  |-  ( ( S  C_  T  /\  T  C_  CC )  -> 
( x  e.  S  |->  x )  e.  ( S -cn-> T ) )
Distinct variable groups:    x, S    x, T

Proof of Theorem cncfmptid
Dummy variables  w  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 sstr 3163 . 2  |-  ( ( S  C_  T  /\  T  C_  CC )  ->  S  C_  CC )
2 simpr 110 . 2  |-  ( ( S  C_  T  /\  T  C_  CC )  ->  T  C_  CC )
3 simpll 527 . . . . 5  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  x  e.  S
)  ->  S  C_  T
)
4 simpr 110 . . . . 5  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  x  e.  S
)  ->  x  e.  S )
53, 4sseldd 3156 . . . 4  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  x  e.  S
)  ->  x  e.  T )
65fmpttd 5670 . . 3  |-  ( ( S  C_  T  /\  T  C_  CC )  -> 
( x  e.  S  |->  x ) : S --> T )
7 simpr 110 . . . 4  |-  ( ( y  e.  S  /\  w  e.  RR+ )  ->  w  e.  RR+ )
87a1i 9 . . 3  |-  ( ( S  C_  T  /\  T  C_  CC )  -> 
( ( y  e.  S  /\  w  e.  RR+ )  ->  w  e.  RR+ ) )
9 eqid 2177 . . . . . . . 8  |-  ( x  e.  S  |->  x )  =  ( x  e.  S  |->  x )
10 id 19 . . . . . . . 8  |-  ( x  =  y  ->  x  =  y )
11 simprll 537 . . . . . . . 8  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  ( ( y  e.  S  /\  z  e.  S )  /\  w  e.  RR+ ) )  -> 
y  e.  S )
129, 10, 11, 11fvmptd3 5608 . . . . . . 7  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  ( ( y  e.  S  /\  z  e.  S )  /\  w  e.  RR+ ) )  -> 
( ( x  e.  S  |->  x ) `  y )  =  y )
13 id 19 . . . . . . . 8  |-  ( x  =  z  ->  x  =  z )
14 simprlr 538 . . . . . . . 8  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  ( ( y  e.  S  /\  z  e.  S )  /\  w  e.  RR+ ) )  -> 
z  e.  S )
159, 13, 14, 14fvmptd3 5608 . . . . . . 7  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  ( ( y  e.  S  /\  z  e.  S )  /\  w  e.  RR+ ) )  -> 
( ( x  e.  S  |->  x ) `  z )  =  z )
1612, 15oveq12d 5890 . . . . . 6  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  ( ( y  e.  S  /\  z  e.  S )  /\  w  e.  RR+ ) )  -> 
( ( ( x  e.  S  |->  x ) `
 y )  -  ( ( x  e.  S  |->  x ) `  z ) )  =  ( y  -  z
) )
1716fveq2d 5518 . . . . 5  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  ( ( y  e.  S  /\  z  e.  S )  /\  w  e.  RR+ ) )  -> 
( abs `  (
( ( x  e.  S  |->  x ) `  y )  -  (
( x  e.  S  |->  x ) `  z
) ) )  =  ( abs `  (
y  -  z ) ) )
1817breq1d 4012 . . . 4  |-  ( ( ( S  C_  T  /\  T  C_  CC )  /\  ( ( y  e.  S  /\  z  e.  S )  /\  w  e.  RR+ ) )  -> 
( ( abs `  (
( ( x  e.  S  |->  x ) `  y )  -  (
( x  e.  S  |->  x ) `  z
) ) )  < 
w  <->  ( abs `  (
y  -  z ) )  <  w ) )
1918exbiri 382 . . 3  |-  ( ( S  C_  T  /\  T  C_  CC )  -> 
( ( ( y  e.  S  /\  z  e.  S )  /\  w  e.  RR+ )  ->  (
( abs `  (
y  -  z ) )  <  w  -> 
( abs `  (
( ( x  e.  S  |->  x ) `  y )  -  (
( x  e.  S  |->  x ) `  z
) ) )  < 
w ) ) )
206, 8, 19elcncf1di 13937 . 2  |-  ( ( S  C_  T  /\  T  C_  CC )  -> 
( ( S  C_  CC  /\  T  C_  CC )  ->  ( x  e.  S  |->  x )  e.  ( S -cn-> T ) ) )
211, 2, 20mp2and 433 1  |-  ( ( S  C_  T  /\  T  C_  CC )  -> 
( x  e.  S  |->  x )  e.  ( S -cn-> T ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    e. wcel 2148    C_ wss 3129   class class class wbr 4002    |-> cmpt 4063   ` cfv 5215  (class class class)co 5872   CCcc 7806    < clt 7988    - cmin 8124   RR+crp 9649   abscabs 10999   -cn->ccncf 13928
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-sep 4120  ax-pow 4173  ax-pr 4208  ax-un 4432  ax-setind 4535  ax-cnex 7899
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-ral 2460  df-rex 2461  df-rab 2464  df-v 2739  df-sbc 2963  df-csb 3058  df-dif 3131  df-un 3133  df-in 3135  df-ss 3142  df-pw 3577  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-br 4003  df-opab 4064  df-mpt 4065  df-id 4292  df-xp 4631  df-rel 4632  df-cnv 4633  df-co 4634  df-dm 4635  df-rn 4636  df-res 4637  df-ima 4638  df-iota 5177  df-fun 5217  df-fn 5218  df-f 5219  df-fv 5223  df-ov 5875  df-oprab 5876  df-mpo 5877  df-map 6647  df-cncf 13929
This theorem is referenced by:  expcncf  13963  dvcnp2cntop  14034
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