Sqrtg_grl.7z Here

(or similar variants) which focuses on sparse precision matrix estimation.

: Likely refers to Square Root Graphical models or Square Root Lasso techniques applied to graphs. SQRTG_GRL.7z

: Look for papers uploaded around the same time you acquired the file, focusing on "Graph Representation Learning" and "Square Root" loss functions. (or similar variants) which focuses on sparse precision