Friday 15th May, 2009 16:00-17:00 Mathematics Building, room 516
In 1934, Vandever introduced the concept of a semiring, which was the common generalization of ring. In 2001, M.K. Sen Shamik Ghosh and Suma Ghosh defined a semiring in a slightly different way and then they defined bisemirings. I will define homomorphism between two bisemirings, then i will show that each homomorphism defines a congruence relation and then i will discuss factor bisemirings.