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Theorem cnconst2 13027
Description: A constant function is continuous. (Contributed by Mario Carneiro, 19-Mar-2015.)
Assertion
Ref Expression
cnconst2  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  ->  ( X  X.  { B } )  e.  ( J  Cn  K ) )

Proof of Theorem cnconst2
Dummy variables  x  u  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fconst6g 5396 . . 3  |-  ( B  e.  Y  ->  ( X  X.  { B }
) : X --> Y )
213ad2ant3 1015 . 2  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  ->  ( X  X.  { B } ) : X --> Y )
32adantr 274 . . . 4  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  /\  x  e.  X )  ->  ( X  X.  { B }
) : X --> Y )
4 simpll3 1033 . . . . . . . 8  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  y  e.  K )  ->  B  e.  Y )
5 simplr 525 . . . . . . . 8  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  y  e.  K )  ->  x  e.  X )
6 fvconst2g 5710 . . . . . . . 8  |-  ( ( B  e.  Y  /\  x  e.  X )  ->  ( ( X  X.  { B } ) `  x )  =  B )
74, 5, 6syl2anc 409 . . . . . . 7  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  y  e.  K )  ->  (
( X  X.  { B } ) `  x
)  =  B )
87eleq1d 2239 . . . . . 6  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  y  e.  K )  ->  (
( ( X  X.  { B } ) `  x )  e.  y  <-> 
B  e.  y ) )
9 simpll1 1031 . . . . . . . . 9  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  (
y  e.  K  /\  B  e.  y )
)  ->  J  e.  (TopOn `  X ) )
10 toponmax 12817 . . . . . . . . 9  |-  ( J  e.  (TopOn `  X
)  ->  X  e.  J )
119, 10syl 14 . . . . . . . 8  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  (
y  e.  K  /\  B  e.  y )
)  ->  X  e.  J )
12 simplr 525 . . . . . . . 8  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  (
y  e.  K  /\  B  e.  y )
)  ->  x  e.  X )
13 df-ima 4624 . . . . . . . . 9  |-  ( ( X  X.  { B } ) " X
)  =  ran  (
( X  X.  { B } )  |`  X )
14 ssid 3167 . . . . . . . . . . . . 13  |-  X  C_  X
15 xpssres 4926 . . . . . . . . . . . . 13  |-  ( X 
C_  X  ->  (
( X  X.  { B } )  |`  X )  =  ( X  X.  { B } ) )
1614, 15ax-mp 5 . . . . . . . . . . . 12  |-  ( ( X  X.  { B } )  |`  X )  =  ( X  X.  { B } )
1716rneqi 4839 . . . . . . . . . . 11  |-  ran  (
( X  X.  { B } )  |`  X )  =  ran  ( X  X.  { B }
)
18 rnxpss 5042 . . . . . . . . . . 11  |-  ran  ( X  X.  { B }
)  C_  { B }
1917, 18eqsstri 3179 . . . . . . . . . 10  |-  ran  (
( X  X.  { B } )  |`  X ) 
C_  { B }
20 simprr 527 . . . . . . . . . . 11  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  (
y  e.  K  /\  B  e.  y )
)  ->  B  e.  y )
2120snssd 3725 . . . . . . . . . 10  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  (
y  e.  K  /\  B  e.  y )
)  ->  { B }  C_  y )
2219, 21sstrid 3158 . . . . . . . . 9  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  (
y  e.  K  /\  B  e.  y )
)  ->  ran  ( ( X  X.  { B } )  |`  X ) 
C_  y )
2313, 22eqsstrid 3193 . . . . . . . 8  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  (
y  e.  K  /\  B  e.  y )
)  ->  ( ( X  X.  { B }
) " X ) 
C_  y )
24 eleq2 2234 . . . . . . . . . 10  |-  ( u  =  X  ->  (
x  e.  u  <->  x  e.  X ) )
25 imaeq2 4949 . . . . . . . . . . 11  |-  ( u  =  X  ->  (
( X  X.  { B } ) " u
)  =  ( ( X  X.  { B } ) " X
) )
2625sseq1d 3176 . . . . . . . . . 10  |-  ( u  =  X  ->  (
( ( X  X.  { B } ) "
u )  C_  y  <->  ( ( X  X.  { B } ) " X
)  C_  y )
)
2724, 26anbi12d 470 . . . . . . . . 9  |-  ( u  =  X  ->  (
( x  e.  u  /\  ( ( X  X.  { B } ) "
u )  C_  y
)  <->  ( x  e.  X  /\  ( ( X  X.  { B } ) " X
)  C_  y )
) )
2827rspcev 2834 . . . . . . . 8  |-  ( ( X  e.  J  /\  ( x  e.  X  /\  ( ( X  X.  { B } ) " X )  C_  y
) )  ->  E. u  e.  J  ( x  e.  u  /\  (
( X  X.  { B } ) " u
)  C_  y )
)
2911, 12, 23, 28syl12anc 1231 . . . . . . 7  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  (
y  e.  K  /\  B  e.  y )
)  ->  E. u  e.  J  ( x  e.  u  /\  (
( X  X.  { B } ) " u
)  C_  y )
)
3029expr 373 . . . . . 6  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  y  e.  K )  ->  ( B  e.  y  ->  E. u  e.  J  ( x  e.  u  /\  ( ( X  X.  { B } ) "
u )  C_  y
) ) )
318, 30sylbid 149 . . . . 5  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y )  /\  x  e.  X )  /\  y  e.  K )  ->  (
( ( X  X.  { B } ) `  x )  e.  y  ->  E. u  e.  J  ( x  e.  u  /\  ( ( X  X.  { B } ) "
u )  C_  y
) ) )
3231ralrimiva 2543 . . . 4  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  /\  x  e.  X )  ->  A. y  e.  K  ( (
( X  X.  { B } ) `  x
)  e.  y  ->  E. u  e.  J  ( x  e.  u  /\  ( ( X  X.  { B } ) "
u )  C_  y
) ) )
33 simpl1 995 . . . . 5  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  /\  x  e.  X )  ->  J  e.  (TopOn `  X )
)
34 simpl2 996 . . . . 5  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  /\  x  e.  X )  ->  K  e.  (TopOn `  Y )
)
35 simpr 109 . . . . 5  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  /\  x  e.  X )  ->  x  e.  X )
36 iscnp 12993 . . . . 5  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  x  e.  X
)  ->  ( ( X  X.  { B }
)  e.  ( ( J  CnP  K ) `
 x )  <->  ( ( X  X.  { B }
) : X --> Y  /\  A. y  e.  K  ( ( ( X  X.  { B } ) `  x )  e.  y  ->  E. u  e.  J  ( x  e.  u  /\  ( ( X  X.  { B } ) "
u )  C_  y
) ) ) ) )
3733, 34, 35, 36syl3anc 1233 . . . 4  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  /\  x  e.  X )  ->  (
( X  X.  { B } )  e.  ( ( J  CnP  K
) `  x )  <->  ( ( X  X.  { B } ) : X --> Y  /\  A. y  e.  K  ( ( ( X  X.  { B } ) `  x
)  e.  y  ->  E. u  e.  J  ( x  e.  u  /\  ( ( X  X.  { B } ) "
u )  C_  y
) ) ) ) )
383, 32, 37mpbir2and 939 . . 3  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  /\  x  e.  X )  ->  ( X  X.  { B }
)  e.  ( ( J  CnP  K ) `
 x ) )
3938ralrimiva 2543 . 2  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  ->  A. x  e.  X  ( X  X.  { B } )  e.  ( ( J  CnP  K ) `  x ) )
40 cncnp 13024 . . 3  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )
)  ->  ( ( X  X.  { B }
)  e.  ( J  Cn  K )  <->  ( ( X  X.  { B }
) : X --> Y  /\  A. x  e.  X  ( X  X.  { B } )  e.  ( ( J  CnP  K
) `  x )
) ) )
41403adant3 1012 . 2  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  ->  ( ( X  X.  { B }
)  e.  ( J  Cn  K )  <->  ( ( X  X.  { B }
) : X --> Y  /\  A. x  e.  X  ( X  X.  { B } )  e.  ( ( J  CnP  K
) `  x )
) ) )
422, 39, 41mpbir2and 939 1  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  B  e.  Y
)  ->  ( X  X.  { B } )  e.  ( J  Cn  K ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    /\ w3a 973    = wceq 1348    e. wcel 2141   A.wral 2448   E.wrex 2449    C_ wss 3121   {csn 3583    X. cxp 4609   ran crn 4612    |` cres 4613   "cima 4614   -->wf 5194   ` cfv 5198  (class class class)co 5853  TopOnctopon 12802    Cn ccn 12979    CnP ccnp 12980
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-coll 4104  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-ral 2453  df-rex 2454  df-reu 2455  df-rab 2457  df-v 2732  df-sbc 2956  df-csb 3050  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-iun 3875  df-br 3990  df-opab 4051  df-mpt 4052  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-f1 5203  df-fo 5204  df-f1o 5205  df-fv 5206  df-ov 5856  df-oprab 5857  df-mpo 5858  df-1st 6119  df-2nd 6120  df-map 6628  df-topgen 12600  df-top 12790  df-topon 12803  df-cn 12982  df-cnp 12983
This theorem is referenced by:  cnconst  13028  cnmptc  13076
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