mats

Hankel matrix analysis of belief state geometry in transformers - companion code for Hankel world-models blog series

Hessian eigenspectrum dendrograms for tracking circuit formation during neural network training

Converts list of daily 24-hour PM2.5 FRM data to SMAT-CE "Official" input file format

Arknights Toolbox for LINE

Interactive spectral geometry visualization on MNIST - companion code for The Spectral Structure of Natural Data

Houdini Guides Website

Interactive exploration of the union of manifolds hypothesis

Sealed, preregistered benchmark for black-box model-diffing agents: five LoRA finetunes of Qwen3.5-9B (one null, three planted behaviours, one dropped backdoor), audited blind by Neel Nanda's diffing-agent recipe and four cheaper conditions. The recipe fails by not asking, and the auditor itself is a failure mode. MATS 12 application.

N-point correlators and polyspectra on MNIST - companion code for Power Laws Are Not Enough