Theorem tgval 13344

Description: The topology generated by a basis. See also tgval2 14774 and tgval3 14781. (Contributed by NM, 16-Jul-2006.) (Revised by Mario Carneiro, 10-Jan-2015.)

Assertion

Ref	Expression
tgval	|- ( B e. V -> ( topGen ` B ) = { x | x C_ U. ( B i^i ~P x ) } )

Distinct variable groups:   x, B   x, V

Proof of Theorem tgval

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elex 2814	. 2 |- ( B e. V -> B e. _V )
2		uniexg 4536	. . 3 |- ( B e. V -> U. B e. _V )
3		abssexg 4272	. . 3 |- ( U. B e. _V -> { x | ( x C_ U. B /\ x C_ U. ~P x ) } e. _V )
4		uniin 3913	. . . . . . 7 |- U. ( B i^i ~P x ) C_ ( U. B i^i U. ~P x )
5		sstr 3235	. . . . . . 7 |- ( ( x C_ U. ( B i^i ~P x ) /\ U. ( B i^i ~P x ) C_ ( U. B i^i U. ~P x ) ) -> x C_ ( U. B i^i U. ~P x ) )
6	4, 5	mpan2 425	. . . . . 6 |- ( x C_ U. ( B i^i ~P x ) -> x C_ ( U. B i^i U. ~P x ) )
7		ssin 3429	. . . . . 6 |- ( ( x C_ U. B /\ x C_ U. ~P x ) <-> x C_ ( U. B i^i U. ~P x ) )
8	6, 7	sylibr 134	. . . . 5 |- ( x C_ U. ( B i^i ~P x ) -> ( x C_ U. B /\ x C_ U. ~P x ) )
9	8	ss2abi 3299	. . . 4 |- { x | x C_ U. ( B i^i ~P x ) } C_ { x | ( x C_ U. B /\ x C_ U. ~P x ) }
10		ssexg 4228	. . . 4 |- ( ( { x | x C_ U. ( B i^i ~P x ) } C_ { x | ( x C_ U. B /\ x C_ U. ~P x ) } /\ { x | ( x C_ U. B /\ x C_ U. ~P x ) } e. _V ) -> { x | x C_ U. ( B i^i ~P x ) } e. _V )
11	9, 10	mpan 424	. . 3 |- ( { x | ( x C_ U. B /\ x C_ U. ~P x ) } e. _V -> { x | x C_ U. ( B i^i ~P x ) } e. _V )
12	2, 3, 11	3syl 17	. 2 |- ( B e. V -> { x | x C_ U. ( B i^i ~P x ) } e. _V )
13		ineq1 3401	. . . . . 6 |- ( y = B -> ( y i^i ~P x ) = ( B i^i ~P x ) )
14	13	unieqd 3904	. . . . 5 |- ( y = B -> U. ( y i^i ~P x ) = U. ( B i^i ~P x ) )
15	14	sseq2d 3257	. . . 4 |- ( y = B -> ( x C_ U. ( y i^i ~P x ) <-> x C_ U. ( B i^i ~P x ) ) )
16	15	abbidv 2349	. . 3 |- ( y = B -> { x | x C_ U. ( y i^i ~P x ) } = { x | x C_ U. ( B i^i ~P x ) } )
17		df-topgen 13342	. . 3 |- topGen = ( y e. _V |-> { x | x C_ U. ( y i^i ~P x ) } )
18	16, 17	fvmptg 5722	. 2 |- ( ( B e. _V /\ { x | x C_ U. ( B i^i ~P x ) } e. _V ) -> ( topGen ` B ) = { x | x C_ U. ( B i^i ~P x ) } )
19	1, 12, 18	syl2anc 411	1 |- ( B e. V -> ( topGen ` B ) = { x | x C_ U. ( B i^i ~P x ) } )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1397   e. wcel 2202   {cab 2217   _Vcvv 2802   i^i cin 3199   C_ wss 3200   ~Pcpw 3652   U.cuni 3893   ` cfv 5326   topGenctg 13336

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-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-iota 5286  df-fun 5328  df-fv 5334  df-topgen 13342

This theorem is referenced by:  tgvalex  13345  tgval2  14774  eltg  14775