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Internal clime functions
likelihood(Sigma, Omega) tracel2(Sigma, Omega)
Covariance matrix.
Inverse covariance matrix.
There are not intended for use by users.
Cai, T.T., Liu, W., and Luo, X. (2011). A constrained \(\ell_1\) minimization approach for sparse precision matrix estimation. Journal of the American Statistical Association 106(494): 594-607.