Bandwidth sum

Bandwidth sum --- широкополосная сумма.

The bandwidth sum of a graph [math]\displaystyle{ G }[/math], denoted by [math]\displaystyle{ B_{s}(G) }[/math], is defined by

[math]\displaystyle{ B_{s}(G) = \min \sum _{uv \in E(G)}|f(u) - f(v)|, }[/math]

where minimum is is taken for all proper labelings of [math]\displaystyle{ G }[/math].