|Talks|

How to sample scale-free degree sequence's realizations uniformly and fast

Visiting speaker
Past Talk
Péter L. Erdős
A. Rényi Institute of Mathematics, Budapest
Apr 26, 2019
3:30 pm
Apr 26, 2019
3:30 pm
In-person
4 Thomas More St
London E1W 1YW, UK
The Roux Institute
Room
100 Fore Street
Portland, ME 04101
Network Science Institute
2nd floor
Network Science Institute
11th floor
177 Huntington Ave
Boston, MA 02115
Network Science Institute
2nd floor
Room
58 St Katharine's Way
London E1W 1LP, UK

Talk recording

Because of the important roles of the Internet and social networks in modern society, much attention has been paid to analyzing graphs with real-world network properties. One of the most prominent traits of many real-world networks is that their degree distribution follows the so-called power-law, usually with parameter \gamma between 2 and 3. Graphs with such degree distributions are sparse but have vertices with very large degrees. There are peculiarly few available methods to sample the realizations of exact degree distribution uniformly. One of them a newly developed exact uniform sampler by Gao and Wormald (SODA, 2018), based on the configuration model. This works when the parameter \gamma is > 2.8810. Another approach is a newly developed version of the switch Markov chains, which suitable to sample power-law degree sequences with parameter \gamma >2.

In this talk we will survey these results.

About the speaker
Péter L. Erdos received his Ms. C. in 1980 and earned his Ph. D. in 1982 at the Eˆtvˆs University, Budapest. He became the Doctor of the Hungarian Academy of Science in 2008. He joined the A. RÈnyi Institute of Mathematics, Hungarian Academy of Sciences in 1997, working now as a scientific advisor of the Institute. His main research interest lays in Combinatorics, Phylogenetics and Theoretical Computer Science
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Apr 26, 2019