@techreport {icl:422, title = {Rectangular Full Packed Format for Cholesky{\textquoteright}s Algorithm: Factorization, Solution and Inversion}, journal = {University of Tennessee Computer Science Technical Report, UT-CS-08-614 (also LAPACK Working Note 199)}, year = {2008}, month = {2008-04}, author = {Fred G. Gustavson and Jerzy Wasniewski and Jack Dongarra} }