- Algebra, Multiple-Valued Logic, and Discrete Mathematics.
The Dr Haddad received his PhD in 1987 from Université de Montréal. He his also an editor of the Multiple-Valued Logic, an International Journal and contributes e to the IEEE International Symposium on Multiple-Valued Logic on a regular basis.
- Haddad, L., Lau, D., & Rosenberg, I.G. (2006). Intervals of Partial Clones Containing Maximal Clones. Journal of Automata, Languages and Combinatorics 11, 399-421.
- Bruen, A.A., Haddad, L., & Wehlau, D.L. (1998). Binary Codes and Caps. Journal of Combinatorial Designs 6, 438-450.
- Haddad, L., & Rosenberg, I.G. (1992). Completeness Theory for Finite Partial Algebras. Algebra Universalis 29, 378-401.
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