Arun Jambulapati, Aaron Sidford. Ultrasparse Ultrasparsifiers and Faster Laplacian System Solvers. In Dániel Marx, editor, Proceedings of the 2021 ACM-SIAM Symposium on Discrete Algorithms, SODA 2021, Virtual Conference, January 10 - 13, 2021. pages 540-559, SIAM, 2021. [doi]
Abstract is missing.