Theorem txtopon 13633

Description: The underlying set of the product of two topologies. (Contributed by Mario Carneiro, 22-Aug-2015.) (Revised by Mario Carneiro, 2-Sep-2015.)

Assertion

Ref	Expression
txtopon	|- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> ( R tX S ) e. (TopOn ` ( X X. Y ) ) )

Proof of Theorem txtopon

Dummy variables v u are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		topontop 13383	. . 3 |- ( R e. (TopOn ` X ) -> R e. Top )
2		topontop 13383	. . 3 |- ( S e. (TopOn ` Y ) -> S e. Top )
3		txtop 13631	. . 3 |- ( ( R e. Top /\ S e. Top ) -> ( R tX S ) e. Top )
4	1, 2, 3	syl2an 289	. 2 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> ( R tX S ) e. Top )
5		eqid 2177	. . . . 5 |- ran ( u e. R , v e. S |-> ( u X. v ) ) = ran ( u e. R , v e. S |-> ( u X. v ) )
6		eqid 2177	. . . . 5 |- U. R = U. R
7		eqid 2177	. . . . 5 |- U. S = U. S
8	5, 6, 7	txuni2 13627	. . . 4 |- ( U. R X. U. S ) = U. ran ( u e. R , v e. S |-> ( u X. v ) )
9		toponuni 13384	. . . . 5 |- ( R e. (TopOn ` X ) -> X = U. R )
10		toponuni 13384	. . . . 5 |- ( S e. (TopOn ` Y ) -> Y = U. S )
11		xpeq12 4644	. . . . 5 |- ( ( X = U. R /\ Y = U. S ) -> ( X X. Y ) = ( U. R X. U. S ) )
12	9, 10, 11	syl2an 289	. . . 4 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> ( X X. Y ) = ( U. R X. U. S ) )
13	5	txbasex 13628	. . . . 5 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> ran ( u e. R , v e. S |-> ( u X. v ) ) e. _V )
14		unitg 13433	. . . . 5 |- ( ran ( u e. R , v e. S |-> ( u X. v ) ) e. _V -> U. ( topGen ` ran ( u e. R , v e. S |-> ( u X. v ) ) ) = U. ran ( u e. R , v e. S |-> ( u X. v ) ) )
15	13, 14	syl 14	. . . 4 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> U. ( topGen ` ran ( u e. R , v e. S |-> ( u X. v ) ) ) = U. ran ( u e. R , v e. S |-> ( u X. v ) ) )
16	8, 12, 15	3eqtr4a 2236	. . 3 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> ( X X. Y ) = U. ( topGen ` ran ( u e. R , v e. S |-> ( u X. v ) ) ) )
17	5	txval 13626	. . . 4 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> ( R tX S ) = ( topGen ` ran ( u e. R , v e. S |-> ( u X. v ) ) ) )
18	17	unieqd 3820	. . 3 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> U. ( R tX S ) = U. ( topGen ` ran ( u e. R , v e. S |-> ( u X. v ) ) ) )
19	16, 18	eqtr4d 2213	. 2 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> ( X X. Y ) = U. ( R tX S ) )
20		istopon 13382	. 2 |- ( ( R tX S ) e. (TopOn ` ( X X. Y ) ) <-> ( ( R tX S ) e. Top /\ ( X X. Y ) = U. ( R tX S ) ) )
21	4, 19, 20	sylanbrc 417	1 |- ( ( R e. (TopOn ` X ) /\ S e. (TopOn ` Y ) ) -> ( R tX S ) e. (TopOn ` ( X X. Y ) ) )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1353   e. wcel 2148   _Vcvv 2737   U.cuni 3809   X. cxp 4623   ran crn 4626   ` cfv 5215  (class class class)co 5872   e. cmpo 5874   topGenctg 12691   Topctop 13366  TopOnctopon 13379   tX ctx 13623

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 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-coll 4117  ax-sep 4120  ax-pow 4173  ax-pr 4208  ax-un 4432  ax-setind 4535

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-ral 2460  df-rex 2461  df-reu 2462  df-rab 2464  df-v 2739  df-sbc 2963  df-csb 3058  df-dif 3131  df-un 3133  df-in 3135  df-ss 3142  df-pw 3577  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-iun 3888  df-br 4003  df-opab 4064  df-mpt 4065  df-id 4292  df-xp 4631  df-rel 4632  df-cnv 4633  df-co 4634  df-dm 4635  df-rn 4636  df-res 4637  df-ima 4638  df-iota 5177  df-fun 5217  df-fn 5218  df-f 5219  df-f1 5220  df-fo 5221  df-f1o 5222  df-fv 5223  df-ov 5875  df-oprab 5876  df-mpo 5877  df-1st 6138  df-2nd 6139  df-topgen 12697  df-top 13367  df-topon 13380  df-bases 13412  df-tx 13624

This theorem is referenced by:  txuni  13634  tx1cn  13640  tx2cn  13641  txcnp  13642  txcnmpt  13644  txdis1cn  13649  txlm  13650  lmcn2  13651  cnmpt12  13658  cnmpt2c  13661  cnmpt21  13662  cnmpt2t  13664  cnmpt22  13665  cnmpt22f  13666  cnmpt2res  13668  cnmptcom  13669  txmetcn  13890  limccnp2lem  14016  limccnp2cntop  14017  dvcnp2cntop  14034  dvaddxxbr  14036  dvmulxxbr  14037  dvcoapbr  14042