no code implementations • 2 Apr 2017 • U. N. Niranjan, Arun Rajkumar, Theja Tulabandhula
The robust PCA problem, wherein, given an input data matrix that is the superposition of a low-rank matrix and a sparse matrix, we aim to separate out the low-rank and sparse components, is a well-studied problem in machine learning.
no code implementations • 9 Feb 2017 • U. N. Niranjan, Arun Rajkumar
We study the problem of ranking a set of items from nonactively chosen pairwise preferences where each item has feature information with it.
no code implementations • 15 Oct 2015 • Animashree Anandkumar, Prateek Jain, Yang Shi, U. N. Niranjan
Robust tensor CP decomposition involves decomposing a tensor into low rank and sparse components.
no code implementations • NeurIPS 2014 • Praneeth Netrapalli, U. N. Niranjan, Sujay Sanghavi, Animashree Anandkumar, Prateek Jain
In contrast, existing methods for robust PCA, which are based on convex optimization, have $O(m^2n)$ complexity per iteration, and take $O(1/\epsilon)$ iterations, i. e., exponentially more iterations for the same accuracy.
1 code implementation • 3 Sep 2013 • Furong Huang, U. N. Niranjan, Mohammad Umar Hakeem, Animashree Anandkumar
We introduce an online tensor decomposition based approach for two latent variable modeling problems namely, (1) community detection, in which we learn the latent communities that the social actors in social networks belong to, and (2) topic modeling, in which we infer hidden topics of text articles.