Algebra Seminar talk

Helmut Länger
Subdirectly irreducible commutative idempotent semirings

Semirings are unitary rings whose addition operation is not necessarily invertible. They also generalize distributive lattices. Since every variety is generated by its subdirectly irreducible members it is important to know all of these members. Generalizing a result of Guzm\'an who solved this problem for the variety of Boolean semirings we provide a partial solution of this problem for the larger variety of commutative idempotent semirings.