• Direct and Subdirect Products
  • Direct Products The universality property of direct products (Burris and Sankappanavar, Ch.II.7, pages 51-56)
  • Subdirect Products Definitions: subdirect products, subdirect embedding, subdirectly irreducible algebras, simple algebras; Criterion for an algebra to be isomorphic to a subdirect product of a given family of algebras. (Burris and Sankappanavar, Ch.II.8, pages 56-57, and G. Pilz, Ch X.61 pages 327-328).