Theorem istps 14700

Description: Express the predicate "is a topological space". (Contributed by Mario Carneiro, 13-Aug-2015.)

Hypotheses

Ref	Expression
istps.a	|- A = ( Base ` K )
istps.j	|- J = ( TopOpen ` K )

Assertion

Ref	Expression
istps	|- ( K e. TopSp <-> J e. (TopOn ` A ) )

Proof of Theorem istps

Dummy variable f is distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-topsp 14699	. . 3 |- TopSp = { f | ( TopOpen ` f ) e. (TopOn ` ( Base ` f ) ) }
2	1	eleq2i 2296	. 2 |- ( K e. TopSp <-> K e. { f | ( TopOpen ` f ) e. (TopOn ` ( Base ` f ) ) } )
3		topontop 14682	. . . 4 |- ( J e. (TopOn ` A ) -> J e. Top )
4		topnfn 13272	. . . . . . 7 |- TopOpen Fn _V
5		fnrel 5418	. . . . . . 7 |- ( TopOpen Fn _V -> Rel TopOpen )
6	4, 5	ax-mp 5	. . . . . 6 |- Rel TopOpen
7		0opn 14674	. . . . . . 7 |- ( J e. Top -> (/) e. J )
8		istps.j	. . . . . . 7 |- J = ( TopOpen ` K )
9	7, 8	eleqtrdi 2322	. . . . . 6 |- ( J e. Top -> (/) e. ( TopOpen ` K ) )
10		relelfvdm 5658	. . . . . 6 |- ( ( Rel TopOpen /\ (/) e. ( TopOpen ` K ) ) -> K e. dom TopOpen )
11	6, 9, 10	sylancr 414	. . . . 5 |- ( J e. Top -> K e. dom TopOpen )
12	11	elexd 2813	. . . 4 |- ( J e. Top -> K e. _V )
13	3, 12	syl 14	. . 3 |- ( J e. (TopOn ` A ) -> K e. _V )
14		fveq2 5626	. . . . 5 |- ( f = K -> ( TopOpen ` f ) = ( TopOpen ` K ) )
15	14, 8	eqtr4di 2280	. . . 4 |- ( f = K -> ( TopOpen ` f ) = J )
16		fveq2 5626	. . . . . 6 |- ( f = K -> ( Base ` f ) = ( Base ` K ) )
17		istps.a	. . . . . 6 |- A = ( Base ` K )
18	16, 17	eqtr4di 2280	. . . . 5 |- ( f = K -> ( Base ` f ) = A )
19	18	fveq2d 5630	. . . 4 |- ( f = K -> (TopOn ` ( Base ` f ) ) = (TopOn ` A ) )
20	15, 19	eleq12d 2300	. . 3 |- ( f = K -> ( ( TopOpen ` f ) e. (TopOn ` ( Base ` f ) ) <-> J e. (TopOn ` A ) ) )
21	13, 20	elab3 2955	. 2 |- ( K e. { f | ( TopOpen ` f ) e. (TopOn ` ( Base ` f ) ) } <-> J e. (TopOn ` A ) )
22	2, 21	bitri 184	1 |- ( K e. TopSp <-> J e. (TopOn ` A ) )

Syntax hints:   <-> wb 105   = wceq 1395   e. wcel 2200   {cab 2215   _Vcvv 2799   (/)c0 3491   dom cdm 4718   Rel wrel 4723   Fn wfn 5312   ` cfv 5317   Basecbs 13027   TopOpenctopn 13268   Topctop 14665  TopOnctopon 14678   TopSpctps 14698

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 4198  ax-sep 4201  ax-pow 4257  ax-pr 4292  ax-un 4523  ax-cnex 8086  ax-resscn 8087  ax-1re 8089  ax-addrcl 8092

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-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 3888  df-int 3923  df-iun 3966  df-br 4083  df-opab 4145  df-mpt 4146  df-id 4383  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-rn 4729  df-res 4730  df-ima 4731  df-iota 5277  df-fun 5319  df-fn 5320  df-f 5321  df-f1 5322  df-fo 5323  df-f1o 5324  df-fv 5325  df-ov 6003  df-oprab 6004  df-mpo 6005  df-1st 6284  df-2nd 6285  df-inn 9107  df-2 9165  df-3 9166  df-4 9167  df-5 9168  df-6 9169  df-7 9170  df-8 9171  df-9 9172  df-ndx 13030  df-slot 13031  df-base 13033  df-tset 13124  df-rest 13269  df-topn 13270  df-top 14666  df-topon 14679  df-topsp 14699

This theorem is referenced by:  istps2  14701  tpspropd  14704  tsettps  14706  isxms2  15120  cnfldtopon  15208