Search Results for author: U. N. Niranjan

Found 5 papers, 1 papers with code

Provable Inductive Robust PCA via Iterative Hard Thresholding

no code implementations2 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.

Inductive Pairwise Ranking: Going Beyond the n log(n) Barrier

no code implementations9 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.

Matrix Completion

Non-convex Robust PCA

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.

Online Tensor Methods for Learning Latent Variable Models

1 code implementation3 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.

Community Detection Computational Efficiency +1

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