Theorem cnmpt12f 14960

Description: The composition of continuous functions is continuous. (Contributed by Mario Carneiro, 5-May-2014.) (Revised by Mario Carneiro, 22-Aug-2015.)

Hypotheses

Ref	Expression
cnmptid.j	|- ( ph -> J e. (TopOn ` X ) )
cnmpt11.a	|- ( ph -> ( x e. X |-> A ) e. ( J Cn K ) )
cnmpt1t.b	|- ( ph -> ( x e. X |-> B ) e. ( J Cn L ) )
cnmpt12f.f	|- ( ph -> F e. ( ( K tX L ) Cn M ) )

Assertion

Ref	Expression
cnmpt12f	|- ( ph -> ( x e. X |-> ( A F B ) ) e. ( J Cn M ) )

Distinct variable groups:   x, F   ph, x   x, J   x, M   x, X   x, K   x, L

Allowed substitution hints:   A( x)   B( x)

Proof of Theorem cnmpt12f

Step	Hyp	Ref	Expression
1		df-ov 6004	. . 3 |- ( A F B ) = ( F ` <. A , B >. )
2	1	mpteq2i 4171	. 2 |- ( x e. X |-> ( A F B ) ) = ( x e. X |-> ( F ` <. A , B >. ) )
3		cnmptid.j	. . 3 |- ( ph -> J e. (TopOn ` X ) )
4		cnmpt11.a	. . . 4 |- ( ph -> ( x e. X |-> A ) e. ( J Cn K ) )
5		cnmpt1t.b	. . . 4 |- ( ph -> ( x e. X |-> B ) e. ( J Cn L ) )
6	3, 4, 5	cnmpt1t 14959	. . 3 |- ( ph -> ( x e. X |-> <. A , B >. ) e. ( J Cn ( K tX L ) ) )
7		cnmpt12f.f	. . 3 |- ( ph -> F e. ( ( K tX L ) Cn M ) )
8	3, 6, 7	cnmpt11f 14958	. 2 |- ( ph -> ( x e. X |-> ( F ` <. A , B >. ) ) e. ( J Cn M ) )
9	2, 8	eqeltrid 2316	1 |- ( ph -> ( x e. X |-> ( A F B ) ) e. ( J Cn M ) )

Syntax hints:   -> wi 4   e. wcel 2200   <.cop 3669   |-> cmpt 4145   ` cfv 5318  (class class class)co 6001  TopOnctopon 14684   Cn ccn 14859   tX ctx 14926

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-ov 6004  df-oprab 6005  df-mpo 6006  df-1st 6286  df-2nd 6287  df-map 6797  df-topgen 13293  df-top 14672  df-topon 14685  df-bases 14717  df-cn 14862  df-tx 14927

This theorem is referenced by:  cnmpt12  14961  fsumcncntop  15241  expcn  15243  cncfmpt2fcntop  15273