[Jun 2016] | Service: PC for DIFF-CVML'16 at CVPR 2016 |
[21.01.2016] | Lecturing on Aspects of Convex, Nonconvex, and Geometric Optimization at Hausdorff Institute for Mathematics |
[18.01.2016] | Paper:"Sum-of-squared logarithms inequality", Accepted to LAA (with L. Borisov, P. Neff, and C. Thiel) |
[2016] | Service: Area Chair for NIPS 2016, ICML 2016 |
[2016] | Service: Program Committee for KDD 2016 |
[12.01.2016] | Book Chapter: Directional Statistics in Machine Learning: a brief review (submitted) |
[04.01.2016] | Visiting Hausdorff Institute for Mathematics and participating in Math of Signal Processing |
[2015] | Served as Area Chair for AISTATS 2016 |
[22.12.2015] | Paper: AdaDelay: Delay Adaptive Distributed Stochastic Optimization (with A. W. Yu, M. Li, A. J. Smola), Accepted to Artificial Intelligence and Statistics 2016 (AISTATS'16) |
[22.12.2015] | Paper: Efficient Sampling for K-Determinantal Point Processes (with C. Li, S. Jegelka), Accepted to Artificial Intelligence and Statistics 2016 (AISTATS'16) |
[22.12.2015] | Book Chapter Geometric Optimization in Machine Learning (with R. Hosseini) |
[17.12.2015] | Preprint update on Riemannian dictionary learning and sparse coding (with A. Cherian) |
[17.12.2015] | Preprint update on Inference and mixture modeling with the Elliptical Gamma distribution (with R. Hosseini, L. Theis, M. Bethge) |
[16.12.2015] | Preprint update Matrix square roots via geometric optimization |
[15.12.2015] | Book Chapter Positive Definite Matrices: Data Representation and Applications to Computer Vision (with A. Cherian) |
[06.12.2015] | Preprint Bounds on bilinear inverse forms via Gaussian quadrature with applications (with C. Li, S. Jegelka) |
[2015] | Served on Program Committee for SIGMOD 2016 |
[2015] | Served on Program Committee for KDD 2015 |
[2015] | Served as Area Chair for ICML 2015 |
[17.11.2015] | Preprint Diversity Networks (with Z. Mariet) |
[18.09.2015] | Preprint Inequalities via elementary symmetric polynomial monotonicity |
[07.09.2015] | Preprint arXiv version of Efficient structured low rank minimization (with A. W. Yu, W. Ma, Y. Yu) |
[07.09.2015] | Preprint on Efficient Sampling for K-Determinantal Point Processes (with C. Li, S. Jegelka) |
[07.09.2015] | Paper: on Positive definite matrices and the S-Divergence to appear in Proc. Amer. Math. Soc. |
[04.09.2015] | OPTML++: Running the OPTML++ research seminar plus reading group |
[04.09.2015] | Paper on Manifold optimization for mixture models accepted to NIPS 2015 (with R. Hosseini) |
[04.09.2015] | Paper: on Asynchronous variance reduced stochastic gradient accepted to NIPS 2015 (with with S. Reddy, A. Hefny, B. Poczos, A. Smola) |
[20.08.2015] | Preprint on Delay sensitive distributed optimization (with A. W. Yu, M. Li, A. J. Smola) |
[17.08.2015] | Preprint on Sum-of-squared logarithms inequality (with L. Borisov, P. Neff, and C. Thiel) |
[14.08.2015] | Announcement! OPT2015: Optimization for Machine Learning, NIPS, Montreal is happening! |
[29.07.2015] | Preprint on Matrix square roots via geometric optimization |
[13.07.2015] | Talk on Conic geometric optimisation at ISMP, 2015 |
[10.07.2015] | Preprint on Riemannian dictionary learning and sparse coding (with A. Cherian) |
[24.06.2015] | Preprint on Manifold optimization for mixture models (with R. Hosseini) |
[24.06.2015] | Paper: on A proof of Thompson's determinantal inequality (with M. Lin) |
[23.06.2015] | Preprint on Variance reduction in stochastic gradient and asynchronous algorithms (with S. Reddy, A. Hefny, B. Poczos, A. Smola) |
[16.06.2015] | Lecturing at the MSR Summer School on Machine Learning, Bangalore Lecture slides are now available |
[17.05.2015] | Paper: on Inequalities for normalized Schur functions accepted to European Journal of Combinatorics (my first combinatorics paper!) |
[12.05.2015] | Paper: on Operator Hlawka-like inequalities on positive definite tensors(with W. Berndt) to Linear Algebra and its Applications (LAA) |
[12.05.2015] | Paper: on efficient randomized coordinate descent algorithms for non separable constrained optimization (deterministic, stochastic, asynchronous) (with S. Reddy, A. Hefny, C. Downey, A. Dubey), accepted to Uncertainty in Artificial Intelligence (UAI 2015) |
[26.04.2015] | Paper: on efficiently learning determinantal point processes (with Z. Mariet). accepted to ICML'15. Incidentally, this paper was written during my first two weeks at MIT with a new student! |
[04.04.2015] | Preprint new version of: Explicit diagonalization of an anti-triangular Cesaró matrix |
[02.04.2015] | Paper: Official version: Conic geometric optimization with R. Hosseini, SIAM Journal on Optimization (SIOPT) is now available online. |
[13.03.2015] | Talk: Speaking about Schur functions at the MIT Combinatorics Seminar!! |
[01.03.2015] | Preprint: Proof of a conjecture in combinatorics: On inequalities for normalized Schur functions |
[22.01.2015] | Paper: Conic geometric optimisation on the manifold of positive definite matrices (with R. Hosseini) accepted for publication to SIAM J. Optimization |
[Jan 2015] | Paper: Data Modeling with the Elliptical Gamma Distribution; upcoming in AISTATS 2015 (with R. Hosseini) |
[16.01.2015] | Moved to MIT! |
[25.12.2014] | Looking for a candidate interested in working on a (paid) potentially high-impact and novel industrial project on machine learning for healthcare informatics. Please email me if you are interested |
[21.11.2014] | Preprint Updated version of: Conic geometric optimisation on the manifold of positive definite matrices |
[17.11.2014] | Preprint Updated version of: Hlawka-Popoviciu inequalities on positive definite tensors |
[16.11.2014] | SoftwareFast total-variation toolbox now on github! |
[29.10.2014] | New preprints
Efficient structured matrix rank minimization (convex optimization, compressed sensing)
Statistical inference with elliptical distributions (nonconvex optimization, mixture modeling) Super fast modular total-variation optimization! (see also: TV webpage) Hlawka inequalities on positive definite tensors (hypergraph cut style operator inequalities) Completely strong superadditivity of generalized matrix functions (if you like matrix submodularity!) Explicit diagonalization of a Cesaró/Markov matrix (min / max kernels, operator norms) Asynchronous Parallel Block-Coordinate Frank-Wolfe (large-scale parallel convex optimization) Randomized coordinate descent methods with linear constraints (work in progress) |
[20.09.2014] | I'm moving to MIT in January 2015! |
[29.07.2014] | Website moved to AWS |
[17.07.2014] | PreprintNew arXiv version of Conic geometric optimisation on the manifold of positive definite matrices |
[15.06.2014] | PaperRiemannian sparse coding, ECCV 2014 |
[01.06.2014] | Wow, I've already left CMU! so quickly it went by!!! |
[30.05.2014] | PaperFast Newton methods for the group fused lasso, New Uncertainty in AI (UAI 2014) |
[25.04.2014] | PaperRobust sparse hashing, IEEE Transactions on Image Processing |
[13.04.2014] | PaperRandomized nonlinear component analysis (ICML 2014) |
[15.03.2014] | Serving as an Area Chair for NIPS 2014 |
Jan 2014 | Teaching Advanced Optimization at CMU from Jan 13 onwards! |
[02.01.2014] | Serving as Associate Editor for Optimization Methods and Software |
[27.12.2013] | Preprint new arXiv version of Positive definite matrices and the S-Divergence |
[11.12.2013] | Paper Stochastic ADMM (ICML 2014) |
[10.12.2013] | Preprint new arXiv version of Positive definite matrices and the symmetric Stein divergence |
[04.12.2013] | Preprint arXiv version of S. Sra, R. Hosseini, "Conic geometric optimisation on the manifold of positive definite matrices" |
[19.11.2013] | Preprint arXiv version of S. Jegelka, F. Bach, S. Sra, "Reflection methods for submodular optimization" |
[25.10.2013] | Paper in IMA J. Numerical Analysis Correlation matrix nearness and completion under observation uncertainty |
[05.09.2013] | Serving as an Area Chair for ICML 2014 |
[05.09.2013] | Serving on the Senior PC for AISTATS 2014 |
[04.09.2013] | Paper (with S. Jegelka, F. Bach) Reflection methods for submodular optimization |
[04.09.2013] | Paper (with R. Hosseini) Geometric optimisation for positive definite matrices |
[01.09.2013] | Visiting ML Dept., School of CS, Carnegie Mellon University for 2 semesters! |
[21.05.2013] | EE227A is over! Hopefully my lecture notes will be available soon! |
[15.03.2013] | Serving as an Area Chair for NIPS 2013 |
[22.01.2013] | Teaching EE227A: Convex Optimization, EECS, UC Berkeley |
[08.12.2012] | Talk Presented a short version of my new distance function at the NIPS Workshop on "Algebraic Topology and Machine Learning" |
[01.12.2012] | Paper Similarity computations on positive definite matrices for fast nearest neighbor search. IEEE TPAMI |
[07.09.2012] | Paper The multivariate Watson distribution: Maximum likelihood and other aspects" in J. Multivariate Analysis |
[03.09.2012] | Paper Large-scale nonconvex nonsmooth optimization |
[03.09.2012] | Paper A new distance metric on the manifold of positive definite matrices |
[24.06.2012] | Talk Speaking @ the NIMS Hot Topics Workshop on Positive Matrices and Operators at KNU, Daegu, Korea |
Jun 2013 | Award. My work on Metric Nearness was selected to receive the SIAM Outstanding Paper Prize, 2011 |
2012 | Book on Optimization for Machine Learning (co-edited with S. Nowozin and S. J. Wright; Publisher: MIT Press) is available here. Here are links to Amazon and Barnes and Noble |