Numerical rank of singular kernel functions. - Ritesh Khan; V. A. Kandappan; Sivaram Ambikasaran (CoRR, 2022)

HODLR2D: A New Class of Hierarchical Matrices. - V. A. Kandappan; Vaishnavi Gujjula; Sivaram Ambikasaran (SIAM J. Sci. Comput., 2023)

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. - Ritesh Khan; V. A. Kandappan; Sivaram Ambikasaran (J. Comput. Phys., 2024)

HODLR3D: hierarchical matrices for N-body problems in three dimensions. - V. A. Kandappan; Vaishnavi Gujjula; Sivaram Ambikasaran (Numer. Algorithms, 2024)