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Theorem cnpf2 13710
Description: A continuous function at point  P is a mapping. (Contributed by Mario Carneiro, 21-Aug-2015.) (Revised by Jim Kingdon, 28-Mar-2023.)
Assertion
Ref Expression
cnpf2  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  F  e.  (
( J  CnP  K
) `  P )
)  ->  F : X
--> Y )

Proof of Theorem cnpf2
Dummy variables  a  b are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simp3 999 . . 3  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  F  e.  (
( J  CnP  K
) `  P )
)  ->  F  e.  ( ( J  CnP  K ) `  P ) )
2 topontop 13517 . . . . 5  |-  ( K  e.  (TopOn `  Y
)  ->  K  e.  Top )
3 cnprcl2k 13709 . . . . 5  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  Top  /\  F  e.  ( ( J  CnP  K ) `  P ) )  ->  P  e.  X )
42, 3syl3an2 1272 . . . 4  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  F  e.  (
( J  CnP  K
) `  P )
)  ->  P  e.  X )
5 iscnp 13702 . . . 4  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  P  e.  X
)  ->  ( F  e.  ( ( J  CnP  K ) `  P )  <-> 
( F : X --> Y  /\  A. a  e.  K  ( ( F `
 P )  e.  a  ->  E. b  e.  J  ( P  e.  b  /\  ( F " b )  C_  a ) ) ) ) )
64, 5syld3an3 1283 . . 3  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  F  e.  (
( J  CnP  K
) `  P )
)  ->  ( F  e.  ( ( J  CnP  K ) `  P )  <-> 
( F : X --> Y  /\  A. a  e.  K  ( ( F `
 P )  e.  a  ->  E. b  e.  J  ( P  e.  b  /\  ( F " b )  C_  a ) ) ) ) )
71, 6mpbid 147 . 2  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  F  e.  (
( J  CnP  K
) `  P )
)  ->  ( F : X --> Y  /\  A. a  e.  K  (
( F `  P
)  e.  a  ->  E. b  e.  J  ( P  e.  b  /\  ( F " b
)  C_  a )
) ) )
87simpld 112 1  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  Y )  /\  F  e.  (
( J  CnP  K
) `  P )
)  ->  F : X
--> Y )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    /\ w3a 978    e. wcel 2148   A.wral 2455   E.wrex 2456    C_ wss 3130   "cima 4630   -->wf 5213   ` cfv 5217  (class class class)co 5875   Topctop 13500  TopOnctopon 13513    CnP ccnp 13689
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-coll 4119  ax-sep 4122  ax-pow 4175  ax-pr 4210  ax-un 4434  ax-setind 4537
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-reu 2462  df-rab 2464  df-v 2740  df-sbc 2964  df-csb 3059  df-dif 3132  df-un 3134  df-in 3136  df-ss 3143  df-pw 3578  df-sn 3599  df-pr 3600  df-op 3602  df-uni 3811  df-iun 3889  df-br 4005  df-opab 4066  df-mpt 4067  df-id 4294  df-xp 4633  df-rel 4634  df-cnv 4635  df-co 4636  df-dm 4637  df-rn 4638  df-res 4639  df-ima 4640  df-iota 5179  df-fun 5219  df-fn 5220  df-f 5221  df-f1 5222  df-fo 5223  df-f1o 5224  df-fv 5225  df-ov 5878  df-oprab 5879  df-mpo 5880  df-1st 6141  df-2nd 6142  df-map 6650  df-top 13501  df-topon 13514  df-cnp 13692
This theorem is referenced by:  iscnp4  13721  cnptopco  13725  cncnp2m  13734  cnptopresti  13741  lmtopcnp  13753  txcnp  13774  metcnpi3  14020  cnplimcim  14139  limccnpcntop  14147  limccnp2lem  14148  limccnp2cntop  14149
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