Andrii Dmytryshyn, Umeå University (IMAGE) Umea University Caption In his dissertation work, Andrii Dmytryshyn, Department of Computing Science at Umeå University has constructed stratification graphs, which in turn provide information for a deeper understanding of how the characteristics of the underlying physical system can change under small perturbations. Credit Mikael Hansson Usage Restrictions This photo may only be used in the context of this news item. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.