publications
articles

Go with the Flow? A LargeScale Analysis of Health Care Delivery Networks in the United States Using Hodge Theory IEEE BigData 2021 Workshop on TDA Applications to Big Data
We employ combinatorial Hodge theory to study referral flows on care delivery networks.

Knowledge Sheaves: A SheafTheoretic Framework for Knowledge Graph Embedding arXiv preprint arXiv:2110.03789
A sheaftheoretic perspective on knowedge graph embedding.

A Unified Paths Perspective for Pruning at Initialization arXiv preprint arXiv:2101.10552
We introduce the Path Kernel as the dataindependent factor in a decomposition of the Neural Tangent Kernel and show the global structure of the Path Kernel can be computed efficiently. This Path Kernel decomposition separates the architectural effects from the datadependent effects within the Neural Tangent Kernel.

Sheaf Neural Networks NeurIPS 2020 Workshop on Topological Data Analysis and Beyond
We present a generalization of graph convolutional networks by generalizing the diffusion operation using the sheaf Laplacian.

The Emergence of HigherOrder Structure in Scientific and Technological Knowledge Networks arXiv preprint arXiv:2009.13620
We use tools from algebraic topology to characterize the higherorder structure of knowledge networks in science and technology across scale and time.

Path Homologies of Deep Feedforward Networks Proceedings of the 18th IEEE International Conference on Machine Learning and Applications (ICMLA)
We characterize two types directed homology–path homology and directed rips homology–with respect to feedforward neural networks’ parameter connectivity.

Characterizing the Shape of Activation Space in Deep Neural Networks Proceedings of the 18th IEEE International Conference on Machine Learning and Applications (ICMLA)
A method for computing persistent homology of activation space within neural networks. We also provide some empirical results about how this topological perspective can inform us about how neural networks process inputs.

Applying SVM algorithms toward predicting host–guest interactions with cucurbit[7]uril Physical Chemistry Chemical Physics
DFT, NMR, ITC, and cell confluence data are used to generate predictive algorithms of supramolecular binding to cucurbit[7]uril and experimentally validate these predictions.

Adversary Detection in Neural Networks via Persistent Homology arXiv preprint arXiv:1711.10056
We show that a multiscale analysis of neural network activations is able to capture the existence of adversarial inputs within neural networks.
talks

Go with the Flow? A LargeScale Analysis of Health Care Delivery Networks in the United States Using Hodge Theory
Presented (virtually) at IEEE BigData 2021

Measuring Breakthrough Discovery and Invention with Algebraic Topology
Presented (virtually) at Networks 2021