The optimal assignment kernel is not positive definite

Details The optimal assignment kernel is not positive definite The optimal assignment kernel is not positive definite

2008-01-26

arxiv.org/abs/0801.4061v1

Computer Science

Learning

Scientific paper

We prove that the optimal assignment kernel, proposed recently as an attempt
to embed labeled graphs and more generally tuples of basic data to a Hilbert
space, is in fact not always positive definite.

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