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A counterexample to a conjecture of S. E. Morris
Author(s):
J.
F.
Feinstein
Journal:
Proc. Amer. Math. Soc.
132
(2004),
2389-2397.
MSC (2000):
Primary 46J10, 46H20
Posted:
February 20, 2004
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Abstract:
We give a counterexample to a conjecture of S. E. Morris by showing that there is a compact plane set such that has no nonzero, bounded point derivations but such that is not weakly amenable. We also give an example of a separable uniform algebra such that every maximal ideal of has a bounded approximate identity but such that is not weakly amenable.
References:
- 1.
- W. G. Bade, P. C. Curtis, Jr., and H. G. Dales, Amenability and weak amenability for Beurling and Lipschitz algebras, Proc. London Math. Soc. (3) 55 (1987), no. 2, 359-377. MR 88f:46098
- 2.
- F. F. Bonsall and J. Duncan, Complete Normed Algebras, Springer-Verlag, New York, 1973. MR 54:11013
- 3.
- A. Browder, Introduction to Function Algebras, W. A. Benjamin, Inc., New York, 1969. MR 39:7431
- 4.
- H. G. Dales, Banach algebras and automatic continuity, London Mathematical Society Monographs, New Series, 24, Oxford Science Publications, The Clarendon Press, Oxford University Press, New York, 2000. MR 2002e:46001
- 5.
- B. J. Cole, One point parts and the peak point conjecture, Ph.D. Thesis, Yale University, 1968.
- 6.
- J. F. Feinstein, Weak
-amenability of , Proceedings of the Centre for Mathematical Analysis, Australian National University, Canberra, 21 (1989), 97-125. MR 91h:46092 - 7.
- J. F. Feinstein, A nontrivial, strongly regular uniform algebra, J. London Math. Soc., 45 (1992), 288-300. MR 93i:46086
- 8.
- J. F. Feinstein, Trivial Jensen measures without regularity, Studia Mathematica, 148 (2001) 67-74. MR 2002k:46127
- 9.
- J. F. Feinstein and D. W. B. Somerset, Non-regularity for Banach function algebras, Studia Mathematica, 141 (2000), 53-68. MR 2001g:46115
- 10.
- T. W. Gamelin, Uniform Algebras, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1969. MR 53:14137
- 11.
- N. Grøenbæck, A characterization of weakly amenable Banach algebras, Studia Math., 94 (1989), 149-162. MR 92a:46055
- 12.
- A. P. Hallstrom, On bounded point derivations and analytic capacity, Journal of Functional Analysis, 4 (1969), 153-165. MR 39:4680
- 13.
- B. E. Johnson, Cohomology in Banach algebras, Memoirs of the American Mathematical Society, No. 127, Providence, RI, 1972. MR 51:11130
- 14.
- T. W. Körner, A cheaper Swiss cheese, Studia Math., 83 (1986), 33-36. MR 87f:46090
- 15.
- S. E. Morris, Bounded derivations from uniform algebras, Ph.D. thesis, University of Cambridge, 1993.
- 16.
- E. L. Stout, The Theory of Uniform Algebras, Bogden and Quigley, Tarrytown-on-Hudson, New York, 1971. MR 54:11066
- 17.
- J. Wermer, Bounded point derivations on certain Banach algebras, J. Funct. Anal., 1 (1967), 28-36. MR 35:5948
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Additional Information:
J.
F.
Feinstein
Affiliation:
School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD, England
Email:
Joel.Feinstein@nottingham.ac.uk
DOI:
10.1090/S0002-9939-04-07382-4
PII:
S 0002-9939(04)07382-4
Received by editor(s):
May 12, 2003
Posted:
February 20, 2004
Communicated by:
N. Tomczak-Jaegermann
Copyright of article:
Copyright
2004,
American Mathematical Society
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