# Jonathan Leech

**Professor of Mathematics, Emeritus**

Phone: (805) 565-6184

Email: leech@westmont.edu

Office Location: Winter Hall 304

**Office Hours**

by appointment

**Specialization**

Non-commutative algebra

Professor Leech has taught at Westmont since 1985. When he's not proving theorems about idempotents and skew lattices, he enjoys painting, and consuming a good cup of coffee.

### Professor Leech has taught

- Geometry
- Linear algebra
- Calculus
- Algebra
- Introduction to Statistics

### Education

- Ph.D. in Mathematics, UCLA
- M.A., Dallas Seminary
- B.A., University of Hawaii

### Research Interests

- Noncommuntative lattices

### Selected Publications

- "On maximal idempotent-closed subrings of Mn(F)" (with K. Cvetko-Vah),
*International Journal of Algebra and Computation*, to appear. - "Rings whose idempotents form a multiplicative set (with K. Cvetko-Vah),
*Communications in Algebra*, to appear. - Cancellation in skew lattices (with K. Cvetko-Vah, M. Kinyon and M. Spinks),
*Order*, 28 (2011),

9 - 32. - Skew Boolean algebras derived from generalized Boolean algebras (with M. Spinks),
*Algebra Universalis*, 58 (2008), 287-302. - Associativity of the nabla-operation on bands in rings (with K. Cvetko-Vah),
*Semigroup Forum*, 76 (2008), 32-50.