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Sivaram Ambikasaran
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Fast Direct Methods for Gaussian Processes
S Ambikasaran, D Foreman-Mackey, L Greengard, DW Hogg, M O'Neil
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2015
5142015
Fast and scalable Gaussian process modeling with applications to astronomical time series
D Foreman-Mackey, E Agol, S Ambikasaran, R Angus
The Astronomical Journal 154 (6), 220, 2017
5082017
An O(N log N) Fast Direct Solver for Partial Hierarchically Semi-Separable Matrices
S Ambikasaran, E Darve
Journal of Scientific Computing 57 (3), 477-501, 2013
2032013
A fast block low-rank dense solver with applications to finite-element matrices
A Aminfar, S Ambikasaran, E Darve
Journal of Computational Physics 304, 170–188, 2016
1222016
Deterministic matrices matching the compressed sensing phase transitions of Gaussian random matrices
H Monajemi, S Jafarpour, M Gavish, Stat 330/CME 362 Collaboration, ...
Proceedings of the National Academy of Sciences 110 (4), 1181-1186, 2013
1082013
Untruncated infinite series superposition method for accurate flexural analysis of isotropic/orthotropic rectangular plates with arbitrary edge conditions
K Bhaskar, S Ambikasaran
Composite Structures 83 (1), 83--92, 2008
562008
The inverse fast multipole method
S Ambikasaran, E Darve
arXiv preprint arXiv:1407.1572, 2014
542014
Large-scale stochastic linear inversion using hierarchical matrices
S Ambikasaran, JY Li, PK Kitanidis, E Darve
Computational Geosciences 17 (6), 913-927, 2013
472013
Application of Hierarchical Matrices to Linear Inverse Problems in Geostatistics
AK Saibaba, S Ambikasaran, J Yue Li, PK Kitanidis, EF Darve
Oil & Gas Science and Technology–Revue d’IFP Energies nouvelles 67 (5), 857--875, 2012
402012
Fast algorithms for dense numerical linear algebra and applications
S Ambikasaran
Stanford University, 2013
392013
A Kalman filter powered by H^2-matrices for quasi-continuous data assimilation problems
JY Li, S Ambikasaran, EF Darve, PK Kitanidis
Water Resources Research 50, 3734–3749, 2014
382014
A fast direct solver for high frequency scattering from a large cavity in two dimensions
J Lai, S Ambikasaran, LF Greengard
SIAM Journal on Scientific Computing 36 (6), B887-B903, 2014
332014
Fast, adaptive, high-order accurate discretization of the Lippmann--Schwinger equation in two dimensions
S Ambikasaran, C Borges, LM Imbert-Gerard, L Greengard
SIAM Journal on Scientific Computing 38 (3), A1770-A1787, 2016
242016
Fast symmetric factorization of hierarchical matrices with applications
S Ambikasaran, M O'Neil, KR Singh
arXiv preprint arXiv:1405.0223, 2014
242014
celerite: Scalable 1D Gaussian Processes in C++
D Foreman-Mackey, E Agol, S Ambikasaran, R Angus
Python, and Julia, 2017
182017
Fast algorithms for Bayesian inversion
S Ambikasaran, AK Saibaba, EF Darve, PK Kitanidis
Computational Challenges in the Geosciences, 101-142, 2013
182013
celerite: Scalable 1D Gaussian Processes in C++, Python, and Julia
D Foreman-Mackey, E Agol, S Ambikasaran, R Angus
Astrophysics Source Code Library, ascl: 1709.008, 2017
122017
A fast direct solver for dense linear systems
S Ambikasaran
122013
HODLRlib: a library for hierarchical matrices
S Ambikasaran, KR Singh, SS Sankaran
Journal of Open Source Software 4 (34), 1167, 2019
112019
Astrophysics Source Code Library
D Foreman-Mackey, E Agol, S Ambikasaran, R Angus
102013
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