The Multi 2-separated L(2,1)-labelling of Lattices
Wensong Lin · Science Technology and Engineering · 2011
The n-fold 2-separated L(2,1)-labelling and the n-fold 2-separated circular L(2,1)-labelling of two kind of lattices are investigated,including triangular and hexagonal lattices.By assigning label sets to vertices of lattices cyclically,the bounds for the n-fold 2-separated L(2,1)-labelling numbers of the triangular lattices is obtained;and completely determined the n-fold 2-separated L(2,1)-labelling numbers and n-fold 2-separated circular L(2,1)-labelling numbers of the hexagonal lattices.