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Duality for Lipschitz p-summing operators

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If you have a question about this talk, please contact Mustapha Amrani .

Discrete Analysis

A theorem of J. Bourgain states that any finite metric space can be embedded into a Hilbert space with distortion proportional to the logarithm of the number of points. In fact Bourgain’s embedding has a richer structure, that of a Lipschitz p-summing operator. These operators were introduced by J. Farmer and W. B. Johnson, and generalize the concept of a linear p-summing operator between Banach spaces . In this talk we identify the dual of the space of Lipschitz p-summing operators from a fi nite metric space to a normed space, answering a question of Farmer and Johnson. Furthermore, we use it to give a characterization of the non-linear concept of Lipschitz p-summing operator between metric spaces in terms of linear operators between certain Banach spaces.

This talk is part of the Isaac Newton Institute Seminar Series series.

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