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M. Fanuel (KU Leuven): Landmark sampling, diversity and kernel methods

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In machine learning, there is a revived interest for kernel methods, e.g. for designing interpretable convolutional networks or in the context of Gaussian processes. More generally, in kernel-based learning, a central question concerns large scale approximations of the kernel matrix. A popular method for finding a low rank approximation of kernel matrices is the so-called Nystrom method, which relies on the sampling of 'good' landmark points in a dataset. We will discuss an approach for selecting 'diverse' landmarks with some theoretical guarantees. Our work makes a connection between kernelized Christoffel functions, ridge leverage scores and determinantal point processes.

Dates: 
Wednesday, September 11, 2019 - 14:00 to 15:00
Location: 
Inria Lille - Nord Europe, Salle plénière
Speaker(s): 
Michaël Fanuel
Affiliation(s): 
KU Leuven