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On weak Hadamard differentiability of convex functions on Banach spaces

Published online by Cambridge University Press:  17 April 2009

J.R. Giles
Affiliation:
Department of Mathematics, The University of Newcastle, New South Wales 2308, Australia
Scott Sciffer
Affiliation:
Department of Mathematics, The University of Newcastle, New South Wales 2308, Australia
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Abstract

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We study two variants of weak Hadamard differentiability of continuous convex functions on a Banach space, uniform weak Hadamard differentiability and weak Hadamard directional differentiability, and determine their special properties on Banach spaces which do not contain a subspace topologically isomorphic to l1.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1996

References

REFERENCES

[1]Borwein, J.M. and Fabian, M., ‘On convex functions having points of Gâteaux differentiability which are not points of Fréchet differentiability’, Canad. J. Math. 45 (1993), 11211134.CrossRefGoogle Scholar
[2]Borwein, J.M. and Fitzpatrick, S., ‘A weak Hadamard smooth renoroning of L 1(ω,μ)’, Canad. Math. Bull. 36 (1993), 407413.CrossRefGoogle Scholar
[3]Contreras, M.D. and Paya, R., ‘On upper semi-continuity of duality mappings’, Proc. Amer. Math. Soc. 121 (1994), 451459.CrossRefGoogle Scholar
[4]Day, M.M., Normed linear spaces, (3rd edition) (Springer-Verlag, Berlin, Heidelberg, New York, 1973).CrossRefGoogle Scholar
[5]Deville, R., Godefroy, G. and Zizler, V., Smoothness and renormings in Banach spaces, Pitman monographs 64 (Longman, New York, 1993).Google Scholar
[6]Giles, J.R. and Moors, W.B., Generic continuity of restricted weak upper semi-continuous set-valued mappings, Set-Valued Analysis (to appear).Google Scholar
[7]Giles, J.R. and Sciffer, Scott, ‘Separable determination of Fréchet differentiability of convex functions’, Bull. Austral. Math. Soc. 52 (1995), 161167.CrossRefGoogle Scholar
[8]Phelps, R.R., Convex functions, monotone operators and differentiability, Lecture notes in mathematics 1364, (2nd edition) (Springer-Verlag, Berlin, Heidelberg, New York, 1993).Google Scholar