In this paper, we define the concept of a closed element and dense element in Semi Heyting Almost Distributive Lattice (SHADL) and derive some properties of closed elements and dense elements of . We also observe that every SHADL is a pseudocomplemented ADL that the set * = { */ } of all closed elements of an SHADL , forms a Boolean algebra with the operation defined as = ( * *)* for every , * where, * = ( 0)

A Project work Submitted in partial fulfillment of the requirement for the Degree of Master of Science in Mathematics