Volume :1 , Issue :4 ,Page :170-182

Abstract :Rosa [14] introduced the notion of graceful la belings. The concept of magic, antimagic and conservative labelings have been extended to directed graphs [12]. Bloom and Hsu [3, 4, 5] extended the notion of graceful labeling to directed graph. In 1985, Lo [13] introduced the notion of edge - graceful graphs. We introduced [8] the concept of edge - graceful labelings to directed graphs and further studied in [9,10]. In this paper we inve stigate directed edge - graceful labeling of T t,n,m graph.