Theorem tgval 13094

Description: The topology generated by a basis. See also tgval2 14523 and tgval3 14530. (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 2783	. 2 |- ( B e. V -> B e. _V )
2		uniexg 4486	. . 3 |- ( B e. V -> U. B e. _V )
3		abssexg 4226	. . 3 |- ( U. B e. _V -> { x | ( x C_ U. B /\ x C_ U. ~P x ) } e. _V )
4		uniin 3870	. . . . . . 7 |- U. ( B i^i ~P x ) C_ ( U. B i^i U. ~P x )
5		sstr 3201	. . . . . . 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 3395	. . . . . 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 3265	. . . 4 |- { x | x C_ U. ( B i^i ~P x ) } C_ { x | ( x C_ U. B /\ x C_ U. ~P x ) }
10		ssexg 4183	. . . 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 3367	. . . . . 6 |- ( y = B -> ( y i^i ~P x ) = ( B i^i ~P x ) )
14	13	unieqd 3861	. . . . 5 |- ( y = B -> U. ( y i^i ~P x ) = U. ( B i^i ~P x ) )
15	14	sseq2d 3223	. . . 4 |- ( y = B -> ( x C_ U. ( y i^i ~P x ) <-> x C_ U. ( B i^i ~P x ) ) )
16	15	abbidv 2323	. . 3 |- ( y = B -> { x | x C_ U. ( y i^i ~P x ) } = { x | x C_ U. ( B i^i ~P x ) } )
17		df-topgen 13092	. . 3 |- topGen = ( y e. _V |-> { x | x C_ U. ( y i^i ~P x ) } )
18	16, 17	fvmptg 5655	. 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 1373   e. wcel 2176   {cab 2191   _Vcvv 2772   i^i cin 3165   C_ wss 3166   ~Pcpw 3616   U.cuni 3850   ` cfv 5271   topGenctg 13086

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 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-13 2178  ax-14 2179  ax-ext 2187  ax-sep 4162  ax-pow 4218  ax-pr 4253  ax-un 4480

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1484  df-sb 1786  df-eu 2057  df-mo 2058  df-clab 2192  df-cleq 2198  df-clel 2201  df-nfc 2337  df-ral 2489  df-rex 2490  df-v 2774  df-sbc 2999  df-un 3170  df-in 3172  df-ss 3179  df-pw 3618  df-sn 3639  df-pr 3640  df-op 3642  df-uni 3851  df-br 4045  df-opab 4106  df-mpt 4107  df-id 4340  df-xp 4681  df-rel 4682  df-cnv 4683  df-co 4684  df-dm 4685  df-iota 5232  df-fun 5273  df-fv 5279  df-topgen 13092

This theorem is referenced by:  tgvalex  13095  tgval2  14523  eltg  14524