TY  - RPRT
TI  - Difference Filter Preconditioning for Large Covariance Matrices
AU  - Anitescu, M.
AU  - Chen, J.
AU  - Stein, M. L.
PY  - 2012
DO  - 10.1137/110834469
UR  - https://www.osti.gov/biblio/1105140
ID  - 1105140
ER  -