Important, easy-to-explain open problems in mathematics

Five browser-based research instruments: graph conjectures, sparse-matrix colouring, a literary atlas, a five-language conformance harness, and geomagnetic storms as graph dynamics.

Twenty magnetic observatories as one correlation graph, rewired daily for 13 years. Storms show up as the network's community structure collapsing.

The same graph algorithms in five languages, run against one pinned contract and compared. Zero disagreements, except where floating point makes it impossible.

191 book reviews placed where the books are set, not where they were published. A reading history as a map and a timeline.

Colour a sparse matrix's bipartite graph in the browser and watch the matrix-vector product count fall. Interactive PreCol.

Mines bounds between graph invariants from every connected graph up to 8 vertices, then tries to break them. A browser rebuild of Fajtlowicz's Graffiti.

My personal website

Compile Time Graph

Browser voice chat for practising a foreign language. Offline speech recognition runs in the tab via WebAssembly Vosk — no server, no build step, no dependencies.

The Graph Theory Software

PreColOneSided

PreColTwoSided

geo_paths_overlap

Dekart Geo Query and Example

Fuzzy title search

Temporal Literature Investigator: Exploring History Through Contemporary Literature

Preconditioning and Coloring

Research paper and code on graph non-homomorphisms

Calling python code from js

Rust version of GTea

A mini-version of GTea written in C++

Auto-generate quiz questions from text using NLP

My personal repository

Writing a simple quiz app with AhaStack

QuizPulse

A web app for learning vocabulary across multiple languages

Online version of GraphTea

Linear Optimization Experiments

Integer Linear Programming for the vertex cover problem