Michael B. Cohen Rasmus Kyng Gary L. Miller Jakub W. Pachocki Richard Peng Anup B. Rao Shen Chen Xu Solving SDD linear systems in nearly <i>m</i>log<sup>1/2</sup><i>n</i> time. 343-352 2014 STOC https://doi.org/10.1145/2591796.2591833 conf/stoc/2014 db/conf/stoc/stoc2014.html#CohenKMPPRX14