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Positive Definite Functions over Regular f-Rings and Representations as Sums of Squares.
Wendy MacCaull
Published in:
Ann. Pure Appl. Log. (1989)
Keyphrases
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positive definite
covariance matrix
kernel function
geometric structure
kernel matrix
diffusion tensor
reproducing kernel hilbert space
kernel machines
learning algorithm
face recognition
pairwise
special case
sufficient conditions
semi parametric