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Theorem txtopon 19965
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.
StepHypRef Expression
1 topontop 19300 . . 3  |-  ( R  e.  (TopOn `  X
)  ->  R  e.  Top )
2 topontop 19300 . . 3  |-  ( S  e.  (TopOn `  Y
)  ->  S  e.  Top )
3 txtop 19943 . . 3  |-  ( ( R  e.  Top  /\  S  e.  Top )  ->  ( R  tX  S
)  e.  Top )
41, 2, 3syl2an 477 . 2  |-  ( ( R  e.  (TopOn `  X )  /\  S  e.  (TopOn `  Y )
)  ->  ( R  tX  S )  e.  Top )
5 eqid 2443 . . . . 5  |-  ran  (
u  e.  R , 
v  e.  S  |->  ( u  X.  v ) )  =  ran  (
u  e.  R , 
v  e.  S  |->  ( u  X.  v ) )
6 eqid 2443 . . . . 5  |-  U. R  =  U. R
7 eqid 2443 . . . . 5  |-  U. S  =  U. S
85, 6, 7txuni2 19939 . . . 4  |-  ( U. R  X.  U. S )  =  U. ran  (
u  e.  R , 
v  e.  S  |->  ( u  X.  v ) )
9 toponuni 19301 . . . . 5  |-  ( R  e.  (TopOn `  X
)  ->  X  =  U. R )
10 toponuni 19301 . . . . 5  |-  ( S  e.  (TopOn `  Y
)  ->  Y  =  U. S )
11 xpeq12 5008 . . . . 5  |-  ( ( X  =  U. R  /\  Y  =  U. S )  ->  ( X  X.  Y )  =  ( U. R  X.  U. S ) )
129, 10, 11syl2an 477 . . . 4  |-  ( ( R  e.  (TopOn `  X )  /\  S  e.  (TopOn `  Y )
)  ->  ( X  X.  Y )  =  ( U. R  X.  U. S ) )
135txbasex 19940 . . . . 5  |-  ( ( R  e.  (TopOn `  X )  /\  S  e.  (TopOn `  Y )
)  ->  ran  ( u  e.  R ,  v  e.  S  |->  ( u  X.  v ) )  e.  _V )
14 unitg 19341 . . . . 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 ) ) )
1513, 14syl 16 . . . 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 ) ) )
168, 12, 153eqtr4a 2510 . . 3  |-  ( ( R  e.  (TopOn `  X )  /\  S  e.  (TopOn `  Y )
)  ->  ( X  X.  Y )  =  U. ( topGen `  ran  ( u  e.  R ,  v  e.  S  |->  ( u  X.  v ) ) ) )
175txval 19938 . . . 4  |-  ( ( R  e.  (TopOn `  X )  /\  S  e.  (TopOn `  Y )
)  ->  ( R  tX  S )  =  (
topGen `  ran  ( u  e.  R ,  v  e.  S  |->  ( u  X.  v ) ) ) )
1817unieqd 4244 . . 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
) ) ) )
1916, 18eqtr4d 2487 . 2  |-  ( ( R  e.  (TopOn `  X )  /\  S  e.  (TopOn `  Y )
)  ->  ( X  X.  Y )  =  U. ( R  tX  S ) )
20 istopon 19299 . 2  |-  ( ( R  tX  S )  e.  (TopOn `  ( X  X.  Y ) )  <-> 
( ( R  tX  S )  e.  Top  /\  ( X  X.  Y
)  =  U. ( R  tX  S ) ) )
214, 19, 20sylanbrc 664 1  |-  ( ( R  e.  (TopOn `  X )  /\  S  e.  (TopOn `  Y )
)  ->  ( R  tX  S )  e.  (TopOn `  ( X  X.  Y
) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 369    = wceq 1383    e. wcel 1804   _Vcvv 3095   U.cuni 4234    X. cxp 4987   ran crn 4990   ` cfv 5578  (class class class)co 6281    |-> cmpt2 6283   topGenctg 14712   Topctop 19267  TopOnctopon 19268    tX ctx 19934
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1605  ax-4 1618  ax-5 1691  ax-6 1734  ax-7 1776  ax-8 1806  ax-9 1808  ax-10 1823  ax-11 1828  ax-12 1840  ax-13 1985  ax-ext 2421  ax-sep 4558  ax-nul 4566  ax-pow 4615  ax-pr 4676  ax-un 6577
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 976  df-tru 1386  df-ex 1600  df-nf 1604  df-sb 1727  df-eu 2272  df-mo 2273  df-clab 2429  df-cleq 2435  df-clel 2438  df-nfc 2593  df-ne 2640  df-ral 2798  df-rex 2799  df-rab 2802  df-v 3097  df-sbc 3314  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-nul 3771  df-if 3927  df-pw 3999  df-sn 4015  df-pr 4017  df-op 4021  df-uni 4235  df-iun 4317  df-br 4438  df-opab 4496  df-mpt 4497  df-id 4785  df-xp 4995  df-rel 4996  df-cnv 4997  df-co 4998  df-dm 4999  df-rn 5000  df-res 5001  df-ima 5002  df-iota 5541  df-fun 5580  df-fn 5581  df-f 5582  df-fv 5586  df-ov 6284  df-oprab 6285  df-mpt2 6286  df-1st 6785  df-2nd 6786  df-topgen 14718  df-top 19272  df-bases 19274  df-topon 19275  df-tx 19936
This theorem is referenced by:  txuni  19966  txcls  19978  tx1cn  19983  tx2cn  19984  txcnp  19994  txcnmpt  19998  txindis  20008  txdis1cn  20009  txlm  20022  lmcn2  20023  xkococn  20034  cnmpt12  20041  cnmpt2c  20044  cnmpt21  20045  cnmpt2t  20047  cnmpt22  20048  cnmpt22f  20049  cnmpt2res  20051  cnmptcom  20052  cnmpt2k  20062  ptunhmeo  20182  xpstopnlem1  20183  xkocnv  20188  xkohmeo  20189  txflf  20380  flfcnp2  20381  cnmpt2plusg  20460  tmdcn2  20461  indistgp  20472  clssubg  20480  qustgplem  20492  prdstmdd  20495  tsmsadd  20522  cnmpt2vsca  20570  txmetcn  20924  cnmpt2ds  21221  fsum2cn  21248  cnmpt2pc  21301  htpyco2  21352  phtpyco2  21363  cnmpt2ip  21561  limccnp2  22169  dvcnp2  22196  dvaddbr  22214  dvmulbr  22215  dvcobr  22222  lhop1lem  22287  taylthlem2  22641  cxpcn3  22994  tpr2tp  27759  txsconlem  28558  txscon  28559  cvmlift2lem11  28631  cvmlift2lem12  28632
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