Last Updated：2025/12/31
Sentence
Based
on
incomplete
data,
estimators
for
bandable
and
sparse
covariance
matrices
are
proposed
and
their
theoretical
and
numerical
properties
are
investigated.
Minimax
rates
of
convergence
are
established
under
the
spectral
norm
loss
and
the
proposed
estimators
are
shown
to
be
rate-optimal
under
mild
regularity
conditions.
Quizzes for review
Based on incomplete data, estimators for bandable and sparse covariance matrices are proposed and their theoretical and numerical properties are investigated. Minimax rates of convergence are established under the spectral norm loss and the proposed estimators are shown to be rate-optimal under mild regularity conditions.
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