The Cohomology of Monoids

Jonathan Leech earned his PhD from the University of California, Los Angeles, in 1969. He has imparted mathematical knowledge at various institutions, including the University of Tennessee, Missouri Western State University, and ultimately at Westmont College in Santa Barbara, California. He has held positions as a Visiting Professor at Case Western Reserve University, the Universidad de Granada in Spain, and Universidade Mackenzie in Brazil. Additionally, he has served as a scholar in residence at both the University of Sydney and the University of Tasmania in Australia, as well as the University of Ljubljana in Slovenia, the University of Petru Maior in Romania and several others. Throughout his academic career, Professor Leech has made many research contributions. In addition to his seminal contributions to the cohomology of monoids and semigroups, he has delved deeply into algebraic structures associated with semigroups. Indeed, he along with colleagues from around the world have established the fundamental principles of modern noncommutative lattice theory through various publications, including his book Noncommutative Lattices: Skew Lattices, Skew Boolean Algebras and Beyond in the Famnit Lectures series of the University of Primorska in Slovenia.