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- Moritz Hardt, Raghu Meka, Prasad Raghavendra, Benjamin Weitz
- COLT
- 2014

Matrix Completion is the problem of recovering an unknown real-valued low-rank matrix from a subsample of its entries. Important recent results show that the problem can be solved efficiently under the assumption that the unknown matrix is incoherent and the subsample is drawn uniformly at random. Are these assumptions necessary? It is well known that… (More)

- Gábor Braun, Jonah Brown-Cohen, Arefin Huq, Sebastian Pokutta, Prasad Raghavendra, Aurko Roy +2 others
- SODA
- 2016

Yannakakis [1991, 1988] showed that the matching problem does not have a small symmetric linear program. Rothvoß [2014] recently proved that any, not necessarily symmetric, linear program also has exponential size. In light of this, it is natural to ask whether the matching problem can be expressed compactly in a framework such as semidefinite programming… (More)

- Benjamin Weitz
- ArXiv
- 2011

We give constructions of n k × n k × n tensors of rank at least 2n k − O(n k−1). As a corollary we obtain an [n] r shaped tensor with rank at least 2n ⌊r/2⌋ − O(n ⌊r/2⌋−1) when r is odd. The tensors are constructed from a simple recursive pattern, and the lower bounds are proven using a partitioning theorem developed by Brockett and Dobkin. These two bounds… (More)

We describe how paperXML, a logical document structure markup for scholarly articles, is generated on the basis of OCR tool outputs. PaperXML has been initially developed for the ACL Anthology Searchbench. The main purpose was to robustly provide uniform access to sentences in ACL Anthology papers from the past 46 years, ranging from scanned,… (More)

- Tselil Schramm, Benjamin Weitz
- ArXiv
- 2015

We give an algorithm for completing an order-m symmetric low-rank tensor from its mul-tilinear entries in time roughly proportional to the number of tensor entries. We apply our tensor completion algorithm to the problem of learning mixtures of product distributions over the hypercube, obtaining new algorithmic results. If the centers of the product… (More)

- Benjamin Weitz, Ulrich Schäfer
- LREC
- 2012

Navigation in large scholarly paper collections is tedious and not well supported in most scientific digital libraries. We describe a novel browser-based graphical tool implemented using HTML5 Canvas. It displays citation information extracted from the paper text to support useful navigation. The tool is implemented using a client/server architecture. A… (More)

- Prasad Raghavendra, Benjamin Weitz
- ArXiv
- 2017

It has often been claimed in recent papers that one can find a degree d Sum-of-Squares proof if one exists via the Ellipsoid algorithm. In [O17], Ryan O'Donnell notes this widely quoted claim is not necessarily true. He presents an example of a polynomial system with bounded coefficients that admits low-degree proofs of non-negativity, but these proofs… (More)

- Benjamin Weitz, Jimmy Wu, Nir Yosef
- ArXiv
- 2016

We introduce an offline dynamic Steiner network problem in which a directed graph, as well as changes to its vertices and edges over a set of discrete times, are given as input; the goal is to find a minimal sub-graph satisfying a set of k time-sensitive connectivity demands. This problem is motivated by our work in computational biology, and naturally… (More)

In this paper we investigate the problem of extracting information about chemical reactions involving multiple species from the time history of the concentration of each species. The mathematical model of the kinetic system leads to a system of ordinary differential equations. Our focus is to examine whether the species' concentrations as functions of time… (More)

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