| Akhil Jain: Personal page of a University of Chicago Financial Mathematics Graduate. |
| Huiqiang Jiang: Research interest: partial differential equations, calculus of variation, and geometric measure theory. |
| Jaffe, David B.: Whitehead Institute/MIT Center for Genome Research. Computational biology. Coding theory database and links. |
| Johnson, Bob: UK mathematician providing material on mathematics courses and research including Fibonacci numbers and chaos theory. |
| Jorgenson, Jay: Includes profile and research interests. |
| Junichi Yananose: Mechanical puzzles and transformable polyhedra. |
| Juno and her Peacocks: A site about math; graduate and professional life; interesting anomalies; resources and links to things mathematical such as Math Camp. |
Classical
