Gracefulness of Unconnected Graphs(P1∨Pn)∪Gr,(P1∨Pn)∪(P3∨r) and Wn∪St(m)
CAI Hua1, WEI Lixia2, LV Xianrui1
1. Institute of Mathematics, Jilin University, Changchun 130012, China;2. Department of Foundation, North China Institute of Science and Technology, Beijing 101601, China