Faculty member Konstantin Mischaikow, with his co-authors Bree Cummins, Tomas Gedeon, Shaun Harker, have posted new results arXiv:1706.04234 on regulatory network models of relevance to systems biology. The authors give a theoretical guarantee that failing to find a match invalidates the model. Their work is applied to gene regulatory models for the yeast S. cerevisiae. The work was partly funded by a grant from the National Institutes of Health, National Science Foundation, and Defense Advanced Research Projects Agency.