Then take and (I do not require filters to be proper).
Robert, why you are trying to find a counter-example for a proved theorem?
Here is the proof.
-- Victor Porton - http://www.mathematics21.org
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No counterexamples, it is proved
Then take
and 
(I do not require filters to be proper).
Robert, why you are trying to find a counter-example for a proved theorem?
Here is the proof.
--
Victor Porton - http://www.mathematics21.org