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A New Characterization of Hardy Martingale Cotype Space

Published online by Cambridge University Press:  20 November 2018

Turdebek N. Bekjan*
Affiliation:
College of Mathematics and Systems Science Xinjiang University Urumqi 830046 China, e-mail: bek@xju.edu.cn
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Abstract

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We give a new characterization of Hardy martingale cotype property of complex quasi-Banach space by using the existence of a kind of plurisubharmonic functions. We also characterize the best constants of Hardy martingale inequalities with values in the complex quasi-Banach space.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 2004

References

[Bu1] Burkholder, D. L., Martingale and Fourier analysis in Banach space. In: Probability and analysis (Varenna, 1985), Lecture Notes in Math. 1206, Springer, Berlin, 1986, pp. 61108.Google Scholar
[Bu2] Burkholder, D. L., Explorations in martingale theory and its applications. In: École d’Été de Probabilités de Saint-Flour XIX—1989, Lecture Notes in Math. 1464 Springer, Berlin, 1991, pp. 166.Google Scholar
[K] Kalton, N. J., Plurisubharmonic functions on quasi-Banach spaces. StudiaMath. 84 (1986), 297324.Google Scholar
[L] Lee, J. M., Biconcave function characterization of UMD and Hilbert spaces. Bull. Austral. Math. Soc. 47 (1993), 297306.Google Scholar
[LB] Liu, P. D., Bekjan, T. N., Inequalities of Hardy martingales and convexity in Complex space. Acta Mathematica Sinica 40 (1997), 133143.Google Scholar
[P] Piasecki, M., A geometric characterization of AUMD Banach spaces via subharmonic functions. Demonstratio Math. 30 (1997), 641654.Google Scholar
[R] Ransford, T., Potential theory in the complex plane. Cambridge University Press, Cambridge, 1995.Google Scholar
[X1] Xu, Q., Inégalités pour les martingales de Hardy et renormage des espaces quasi-normés. C. R. Acad. Paris 306 (1988), 601604.Google Scholar
[X2] Xu, Q., Convexités uniformes et inégalités de martingales. Math. Ann. 287 (1990), 193211.Google Scholar
[X3] Xu, Q., Littlewood-Paley theory for functions with values in uniformly convex spaces. J. Reine Angew. Math. 504 (1998), 195226.Google Scholar