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

Theory of Combinatorial Algorithms

Prof. Emo Welzl

Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Monday, September 11, 2017, 12:15 pm

Duration: 30 minutes

Location: CAB G11

Speaker: Haris Angelidakis (Toyota Technological Institute at Chicago)

Algorithms for Stable and Perturbation-Resilient Problems

We study a beyond-worst-case-analysis framework known as stability and perturbation resilience, introduced by Bilu and Linial (2010) and Awasthi, Blum, and Sheffet (2012). A combinatorial optimization problem is $\alpha$-stable or $\alpha$-perturbation-resilient if the optimal solution does not change when we perturb all parameters of the problem by a factor of at most $\alpha$. We present improved algorithms for stable instances of clustering problems, such as k-means and k-median, and also give improved algorithms for stable instances of Minimum Multiway Cut. We conclude with several hardness results for stable instances of covering problems. Based on joint work with Konstantin Makarychev and Yury Makarychev.

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

Previous talks by year:   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