Bhoumik, S.; Mitra, S.
(ДЗ "ЛНУ імені Тараса Шевченка", 2018)
For any two positive integers m, n, we denote
the graph Km,n ⊙ K1 by G. Ma Ke-Jie proposed a conjecture [9]
that pendant edge extension of a complete bipartite graph is a k-
graceful graph for k > 2. In this paper we ...