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Theorem txtopiOLD 25885
Description: The product of two topologies is a topology. (Moved to txtopi 17279 in main set.mm and may be deleted by mathbox owner, JM. --NM 15-Oct-2012.) (Contributed by Jeff Madsen, 15-Jun-2010.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypotheses
Ref Expression
txtopiOLD.1  |-  R  e. 
Top
txtopiOLD.2  |-  S  e. 
Top
Assertion
Ref Expression
txtopiOLD  |-  ( R 
tX  S )  e. 
Top

Proof of Theorem txtopiOLD
StepHypRef Expression
1 txtopiOLD.1 . 2  |-  R  e. 
Top
2 txtopiOLD.2 . 2  |-  S  e. 
Top
31, 2txtopi 17279 1  |-  ( R 
tX  S )  e. 
Top
Colors of variables: wff set class
Syntax hints:    e. wcel 1685  (class class class)co 5819   Topctop 16625    tX ctx 17249
This theorem was proved from axioms:  ax-1 7  ax-2 8  ax-3 9  ax-mp 10  ax-gen 1534  ax-5 1545  ax-17 1604  ax-9 1637  ax-8 1645  ax-13 1687  ax-14 1689  ax-6 1704  ax-7 1709  ax-11 1716  ax-12 1867  ax-ext 2265  ax-sep 4142  ax-nul 4150  ax-pow 4187  ax-pr 4213  ax-un 4511
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3an 938  df-tru 1312  df-ex 1530  df-nf 1533  df-sb 1632  df-eu 2148  df-mo 2149  df-clab 2271  df-cleq 2277  df-clel 2280  df-nfc 2409  df-ne 2449  df-ral 2549  df-rex 2550  df-rab 2553  df-v 2791  df-sbc 2993  df-csb 3083  df-dif 3156  df-un 3158  df-in 3160  df-ss 3167  df-nul 3457  df-if 3567  df-pw 3628  df-sn 3647  df-pr 3648  df-op 3650  df-uni 3829  df-iun 3908  df-br 4025  df-opab 4079  df-mpt 4080  df-id 4308  df-xp 4694  df-rel 4695  df-cnv 4696  df-co 4697  df-dm 4698  df-rn 4699  df-res 4700  df-ima 4701  df-fun 5223  df-fn 5224  df-f 5225  df-fv 5229  df-ov 5822  df-oprab 5823  df-mpt2 5824  df-1st 6083  df-2nd 6084  df-topgen 13338  df-top 16630  df-bases 16632  df-tx 17251
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