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Gradient descent with identity initialization efficiently learns positive definite linear transformations.
Peter L. Bartlett
David P. Helmbold
Philip M. Long
Published in:
ICML (2018)
Keyphrases
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positive definite
linear transformations
linear transformation
covariance matrix
kernel function
geometric structure
linear model
objective function
parameter space
least squares
loss function
kernel matrix
diffusion tensor
reproducing kernel hilbert space
kernel machines