Dan Gordon

I am an emeritus researcher at the Center for Communications Research–La Jolla. My research interests include combinatorial design theory and computational number theory.

From 1996 until 2026 I maintained the La Jolla Combinatorics Repository, a collection of combinatorial databases that started with covering designs, and over the years added difference sets, circulant weighing matrices, and recently relative and signed difference sets. These were presented first as HTML pages, then as a MySQL database, and finally as json files with python scripts to access the data. This website has details about each combinatorial object, and a link to the permanent data repository.

See my publications for more information.