Journal of the London Mathematical Society Advance Access originally published online on May 3, 2007
Journal of the London Mathematical Society 2007 75(2):409-419; doi:10.1112/jlms/jdm003
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© 2007 London Mathematical Society
On strongly asymptotic lp spaces and minimality
1 Department of Mathematics
University of South Carolina
Columbia, SC 29208
USA
2 Equipe dAnalyse Fonctionnelle
Bôi te 186
Université Paris 6
4, place Jussieu
75252 Paris cedex 05
France
ferenczi{at}ccr.jussieu.fr
3 Institute of Mathematics
Bulgarian Academy of Sciences
Sofia
Bulgaria
Current address:
Department of Mathematics
University of Illinois at Urbana-Champaign
Urbana, IL 61801
USA
denka{at}math.uiuc.edu
4 Department of Mathematics
The University of Texas at Austin
1 University Station C1200
Austin, TX 78712-0257
USA
odell{at}math.utexas.edu
Let 1
p
and let X be a Banach space with a semi-normalized strongly asymptotic
p basis (ei). If X is minimal and 1
p < 2, then X is isomorphic to a subspace of
p. If X is minimal and 2
p <
, or if X is complementably minimal and 1
p
, then (ei) is equivalent to the unit vector basis of
p (or c0 if p =
).
dilworth{at}math.sc.edu
2000 Mathematics Subject Classification 46B20 (Primary), 46B15 (Secondary).
The first, third, and fourth authors were supported by the Workshop in Analysis and Probability at Texas A&M University in 2005. Research of the fourth author was partially supported by the National Science Foundation.
Received January 3, 2006; published online May 3, 2007.