Representation Learning

Approximately Equivariant Graph Networks

We focus on the active symmetries of GNNs, and show a bias-variance tradeoff controlled by the choice of symmetry.

Fine-grained Expressivity of Graph Neural Networks

We quantify which distances MPNNs induce, leading to a fine-grained understanding of their expressivity.

From Local to Global: Spectral-Inspired Graph Neural Networks

We propose spectral-inspired GNNs that exploit the advantages from both global and local methods.

A Simple Spectral Failure Mode for Graph Convolutional Networks

A simple generative model in which spectral graph embedding for subsequent inference succeeds whereas unsupervised GCN fails.

Learning Robust Multimodal Knowledge Graph Representations

We propose a new method to make NLP models more parameter efficient by storing and retrieving knowledge in an external knowledge graph.

Topic Modelling with Latent Dirichlet Allocation (LDA) on Wikipedia Articles

An interative visualization showing results of topic modelling on 33k Wikipedia articles

Chatbot

An interactive jupyter notebook implementing live chatbot using N-gram blocking

Matrix Completion for Different Missing Data Patterns

A study of three matrix imputation methods on different types of missing data patterns