Publications

• Sivaram Ambikasaran, Ritesh Khan, Johannes Tausch, Sihao Wang. A Hybrid Interpolation ACA Accelerated Method for Parabolic Boundary Integral Operators, SIAM Journal on Scientific Computing, Volume 47(3), 2025, A1507-A1526, https://doi.org/10.1137/24M1683809.
• Ritesh Khan, Sivaram Ambikasaran. New Algebraic Fast Algorithms for N-body Problems in Two and Three Dimensions, Communications in Computational Physics, Volume 37(4), 2025, 1157–1226, https://doi.org/10.4208/cicp.OA-2024-0100.
• Ritesh Khan, V.A. Kandappan, Sivaram Ambikasaran. HODLRdD: A new black-box fast algorithm for N-body problems in d-dimensions with guaranteed error bounds: Applications to integral equations and support vector machines, Journal of Computational Physics, Volume 501, 2024, 112786, https://doi.org/10.1016/j.jcp.2024.112786.

Preprints

• Ritesh Khan, Erin Carson. Hybrid hierarchical matrices with adaptive mixed precision storage, https://arxiv.org/pdf/2604.09147.

• Ritesh Khan, Sivaram Ambikasaran. New hierarchical matrices for fast kernel matrix-vector products with applications: Applications to Gaussian Processes and Kernel Ridge Regression (under review).

  You can also find my articles on my Google Scholar profile.