Han Liu, Assistant Professor, Princeton University
Date and Time: Sep 07, 2016 (12:30 PM)
Location: Orchard room (3280) at the Wisconsin Institute for Discovery Building
Video : https://vimeo.com/182451507
We propose the combinatorial inference to explore the global topological structures of graphical models.In particular, we conduct hypothesis tests on many combinatorial graph properties including connectivity, hub detection, perfect matching, etc. Our methods can be applied to any graph property which is invariant under the deletion of edges. On the other side, we also develop a generic minimax lower bound which shows the optimality of the proposed method for a large family of graph properties. If time permits, I will also discuss the computational lower bounds of the combinatorial inference problem under the oracle computational model. Our methods are applied to the neuroscience by discovering hub voxels contributing to visual memories (Joint work with Junwei Lu, Matey Neykov, Kean Ming Tan, and Zhaoran Wang).