Journal of the London Mathematical Society Advance Access originally published online on January 29, 2007
Journal of the London Mathematical Society 2007 75(1):176-186; doi:10.1112/jlms/jdl010
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© 2007 London Mathematical Society
The l
direct sum of Lp (1 < p <
) is primary
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Using Szemeredi's theorem on arithmetic progressions, it is shown that, for 1 < p <
, the infinite l
direct sum (Lp
Lp
· · · )l
is a primary Banach space.
2000 Mathematics Subject Classification 46B03, 46B25
Received September 7, 2001; revised May 17, 2006; published online January 29, 2007.