Department of Computer Science | Institute of Theoretical Computer Science | CADMO

Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar (in cooperation with A. Steger, D. Steurer and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Thursday, January 12, 2017, 12:15 pm

Duration: 45 minutes

Location: OAT S15/S16/S17

Speaker: David Steurer (Cornell Univ., Ithaca, and Inst. of Advanced Study, Princeton)

Efficient algorithms for tensor decomposition and their applications

Tensor decomposition is at the heart of many computational tasks that arise in machine learning and other kinds of data analyses, for example, learning mixtures of Gaussians and sparse dictionaries. I will present a recent algorithmic framework for this problem based on a powerful convex relaxation method called sum-of-squares. This framework gives the first polynomial-time algorithms with provable guarantees for many interesting classes of instances. What underlies our results is a general strategy for turning algorithms with prohibitive sample complexity into sample-efficient ones. Finally, we demonstrate how to extract fast and practical algorithms from our framework that do not require solving convex relaxations but still achieve comparable provable guarantees. The running times of the resulting algorithms are linear or close to linear in the size of the input. Based on joint works with Boaz Barak, Sam Hopkins, Jonathan Kelner, Tengyu Ma, Tselil Schramm, and Jonathan Shi (STOC'15, STOC'16, FOCS'16).

Upcoming talks     |     All previous talks     |     Talks by speaker     |     Upcoming talks in iCal format (beta version!)

Previous talks by year:   2024  2023  2022  2021  2020  2019  2018  2017  2016  2015  2014  2013  2012  2011  2010  2009  2008  2007  2006  2005  2004  2003  2002  2001  2000  1999  1998  1997  1996  

Information for students and suggested topics for student talks

Automatic MiSe System Software Version 1.4803M   |   admin login