Institutional Address:
Centro de Álgebra da Universidade de Lisboa
Av. Prof. Gama Pinto, 2, 1649-003 Lisboa, Portugal

Phone: +351 217904991 | Fax: +351 217954288 | Email: don@math.niu.edu

Web: www.math.niu.edu/~don

Area:
Semigroups, Automata and Languages (Type: Collaborator)

Position:
Professor Emeritus, Northern Illinois University, U.S.A.

Principal Area:
Semigroups

Other Area:

Qualifications:

• Ph.D. Queen's University, Belfast, Ireland 1966