Graceful labeling of posets

The concept of graph labeling was introduced in mid-1960 by Rosa. In this paper,we introduce a notion of graceful labeling of a finite poset. We obtain gracefullabeling of some postes such as a chain, a fence, and a crown. In 2002 Thakare,Pawar, and Waphare introduced the ‘adjunct’ operation of two lattices with respectto an adjunct pair of elements. We obtain the graceful labeling of an adjunct sumof two chains with respect to an adjunct pair (0, 1).