Theorem tgval 12000

Description: The topology generated by a basis. See also tgval2 12002 and tgval3 12009. (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 2652	. 2 |- ( B e. V -> B e. _V )
2		uniexg 4299	. . 3 |- ( B e. V -> U. B e. _V )
3		abssexg 4046	. . 3 |- ( U. B e. _V -> { x | ( x C_ U. B /\ x C_ U. ~P x ) } e. _V )
4		uniin 3703	. . . . . . 7 |- U. ( B i^i ~P x ) C_ ( U. B i^i U. ~P x )
5		sstr 3055	. . . . . . 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 419	. . . . . 6 |- ( x C_ U. ( B i^i ~P x ) -> x C_ ( U. B i^i U. ~P x ) )
7		ssin 3245	. . . . . 6 |- ( ( x C_ U. B /\ x C_ U. ~P x ) <-> x C_ ( U. B i^i U. ~P x ) )
8	6, 7	sylibr 133	. . . . 5 |- ( x C_ U. ( B i^i ~P x ) -> ( x C_ U. B /\ x C_ U. ~P x ) )
9	8	ss2abi 3116	. . . 4 |- { x | x C_ U. ( B i^i ~P x ) } C_ { x | ( x C_ U. B /\ x C_ U. ~P x ) }
10		ssexg 4007	. . . 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 418	. . 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 3217	. . . . . 6 |- ( y = B -> ( y i^i ~P x ) = ( B i^i ~P x ) )
14	13	unieqd 3694	. . . . 5 |- ( y = B -> U. ( y i^i ~P x ) = U. ( B i^i ~P x ) )
15	14	sseq2d 3077	. . . 4 |- ( y = B -> ( x C_ U. ( y i^i ~P x ) <-> x C_ U. ( B i^i ~P x ) ) )
16	15	abbidv 2217	. . 3 |- ( y = B -> { x | x C_ U. ( y i^i ~P x ) } = { x | x C_ U. ( B i^i ~P x ) } )
17		df-topgen 11923	. . 3 |- topGen = ( y e. _V |-> { x | x C_ U. ( y i^i ~P x ) } )
18	16, 17	fvmptg 5429	. 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 406	1 |- ( B e. V -> ( topGen ` B ) = { x | x C_ U. ( B i^i ~P x ) } )

Syntax hints:   -> wi 4   /\ wa 103   = wceq 1299   e. wcel 1448   {cab 2086   _Vcvv 2641   i^i cin 3020   C_ wss 3021   ~Pcpw 3457   U.cuni 3683   ` cfv 5059   topGenctg 11917

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 671  ax-5 1391  ax-7 1392  ax-gen 1393  ax-ie1 1437  ax-ie2 1438  ax-8 1450  ax-10 1451  ax-11 1452  ax-i12 1453  ax-bndl 1454  ax-4 1455  ax-13 1459  ax-14 1460  ax-17 1474  ax-i9 1478  ax-ial 1482  ax-i5r 1483  ax-ext 2082  ax-sep 3986  ax-pow 4038  ax-pr 4069  ax-un 4293

This theorem depends on definitions:  df-bi 116  df-3an 932  df-tru 1302  df-nf 1405  df-sb 1704  df-eu 1963  df-mo 1964  df-clab 2087  df-cleq 2093  df-clel 2096  df-nfc 2229  df-ral 2380  df-rex 2381  df-v 2643  df-sbc 2863  df-un 3025  df-in 3027  df-ss 3034  df-pw 3459  df-sn 3480  df-pr 3481  df-op 3483  df-uni 3684  df-br 3876  df-opab 3930  df-mpt 3931  df-id 4153  df-xp 4483  df-rel 4484  df-cnv 4485  df-co 4486  df-dm 4487  df-iota 5024  df-fun 5061  df-fv 5067  df-topgen 11923

This theorem is referenced by:  tgvalex  12001  tgval2  12002  eltg  12003