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Translation-invariant linear operators

Published online by Cambridge University Press:  24 October 2008

H. G. Dales
Affiliation:
School of Mathematics, University of Leeds, Leeds LS2 9JT
A. Millinoton
Affiliation:
School of Mathematics, University of Leeds, Leeds LS2 9JT

Extract

The theory of translation-invariant operators on various spaces of functions (or measures or distributions) is a well-trodden field. The problem is to decide, first, whether or not a linear operator between two function spaces on, say, ℝ or ℝ+ which commutes with one or many translations on the two spaces is necessarily continuous, and, second, to give a canonical form for all such continuous operators. In some cases each such operator is zero. The second problem is essentially the ‘multiplier problem’, and it has been extensively discussed; see [7], for example.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1993

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References

REFERENCES

[1]Albrecht, E. and Neumann, M. M.. Automatische Stetigkeitseigenschaften einiger Kiassen linear Operatoren. Math. Ann. 240 (1979), 251280.CrossRefGoogle Scholar
[2]Albrecht, E. and Neumann, M. M.. Automatic continuity of local linear operators. Manuscripta Math. 32 (1980), 263294.CrossRefGoogle Scholar
[3]Dunford, N. and Schwartz, J. T.. Linear Operators, part 1 (Interscience, 1967).Google Scholar
[4]Hewitt, E. and Ross, K. A.. Abstract Harmonic Analysis, vol. 2 (Springer-Verlag, 1970).Google Scholar
[5]Johnson, B. E.. Continuity of linear operators commuting with continuous linear operators. Trans. Amer. Math. Soc. 128 (1967), 88102.CrossRefGoogle Scholar
[6]Johnson, B. E. and Sinclair, A. M.. Continuity of linear operators commuting with continuous linear operators, II. Trans. Amer. Math. Soc. 146 (1969), 533540.CrossRefGoogle Scholar
[7]Larson, R.. An Introduction to the Theory of Multipliers (Springer-Verlag, 1971).CrossRefGoogle Scholar
[8]Laursen, K. B. and Neumann, M. M.. Decomposable operators and automatic continuity. J. Operator Theory 15, (1986), 3351.Google Scholar
[9]Laursen, K. B. and Neumann, M. M.. Automatic continuity of intertwining linear operators on Banach spaces. Rend. Circ. Mat. Palermo 40 (1991), 325341.CrossRefGoogle Scholar
[10]Loy, R. J.. Continuity of linear operators commuting with shifts. J. Funct. Anal. 16 (1974), 4860.CrossRefGoogle Scholar
[11]Millington, A.. Linear operators which commute with translation. Thesis, University of Leeds (1991).Google Scholar
[12]Neumann, M. M. and Pták, V.. Automatic continuity, local type and causality. Studia Math. 82 (1985), 6190.CrossRefGoogle Scholar
[13]Rudin, W.. Real and Complex Analysis, 3rd edition (McGraw-Hill, 1987).Google Scholar
[14]Sinclair, A. M.. A discontinuous intertwining operator. Trans. Amer. Math. Soc. 188 (1974), 259267.CrossRefGoogle Scholar