Theorem cnmptid 15092

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

Hypothesis

Ref	Expression
cnmptid.j	|- ( ph -> J e. (TopOn ` X ) )

Assertion

Ref	Expression
cnmptid	|- ( ph -> ( x e. X |-> x ) e. ( J Cn J ) )

Distinct variable groups:   ph, x   x, J   x, X

Proof of Theorem cnmptid

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		equcom 1754	. . . . . 6 |- ( x = y <-> y = x )
2	1	opabbii 4161	. . . . 5 |- { <. x , y >. | x = y } = { <. x , y >. | y = x }
3		df-id 4396	. . . . 5 |- _I = { <. x , y >. | x = y }
4		mptv 4191	. . . . 5 |- ( x e. _V |-> x ) = { <. x , y >. | y = x }
5	2, 3, 4	3eqtr4i 2262	. . . 4 |- _I = ( x e. _V |-> x )
6	5	reseq1i 5015	. . 3 |- ( _I |` X ) = ( ( x e. _V |-> x ) |` X )
7		ssv 3250	. . . 4 |- X C_ _V
8		resmpt 5067	. . . 4 |- ( X C_ _V -> ( ( x e. _V |-> x ) |` X ) = ( x e. X |-> x ) )
9	7, 8	ax-mp 5	. . 3 |- ( ( x e. _V |-> x ) |` X ) = ( x e. X |-> x )
10	6, 9	eqtri 2252	. 2 |- ( _I |` X ) = ( x e. X |-> x )
11		cnmptid.j	. . 3 |- ( ph -> J e. (TopOn ` X ) )
12		idcn 15023	. . 3 |- ( J e. (TopOn ` X ) -> ( _I |` X ) e. ( J Cn J ) )
13	11, 12	syl 14	. 2 |- ( ph -> ( _I |` X ) e. ( J Cn J ) )
14	10, 13	eqeltrrid 2319	1 |- ( ph -> ( x e. X |-> x ) e. ( J Cn J ) )

Syntax hints:   -> wi 4   = wceq 1398   e. wcel 2202   _Vcvv 2803   C_ wss 3201   {copab 4154   |-> cmpt 4155   _I cid 4391   |` cres 4733   ` cfv 5333  (class class class)co 6028  TopOnctopon 14821   Cn ccn 14996

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-ral 2516  df-rex 2517  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-iun 3977  df-br 4094  df-opab 4156  df-mpt 4157  df-id 4396  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-f 5337  df-f1 5338  df-fo 5339  df-f1o 5340  df-fv 5341  df-ov 6031  df-oprab 6032  df-mpo 6033  df-1st 6312  df-2nd 6313  df-map 6862  df-top 14809  df-topon 14822  df-cn 14999

This theorem is referenced by:  imasnopn  15110  expcn  15380