|
|
The Distinguishing Chromatic Number of Bipartite Graphs of Girth At Least Six
|
|
|
|
|
نویسنده
|
Alikhani Saeid ,Soltani Samaneh
|
منبع
|
Journal Of Algebraic Structures And Their Applications - 2016 - دوره : 3 - شماره : 2 - صفحه:81 -87
|
|
|
چکیده
|
The distinguishing number d(g) of a graph g is the least integer d such that g has a vertex labeling with d labels that is preserved only by a trivial automorphism. the distinguishing chromatic number chi_{d}(g) of g is defined similarly, where, in addition, f is assumed to be a proper labeling. we prove that if g is a bipartite graph of girth at least six with the maximum degree delta (g), then chi_{d}(g)leq delta (g)+1. we also obtain an upper bound for chi_{d}(g) where g is a graph with at most one cycle. finally, we state a relationship between the distinguishing chromatic number of a graph and its spanning subgraphs.
|
کلیدواژه
|
Distinguishing Number ,Distinguishing Chromatic Number ,Symmetry Breaking
|
آدرس
|
Yazd University, Department Mathematics, ایران, Yazd University, Department Mathematics, ایران
|
پست الکترونیکی
|
s.soltani1979@gmail.com
|
|
|
|
|
|
|
|
|
|
|
|
Authors
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|