A note on sequences variant of irregularity strength for hypercubes

Abstract

Let $f:E\mapsto \{1,2,\dots ,k\}$ be an edge coloring of the $n$ - dimensional hypercube $H_n$. By the palette at a vertex $v$ we mean the sequence $\left(f(e_1(v)),f(e_1(v)),\dots ,f(e_n(v))\right)$, where $e_i(v)$ is the $i$ - dimensional edge incident to $v$. In the paper, we show that two colors are enough to distinguish all vertices of the $n$ - dimensional hypercube $H_n$ ($n\ge 2$) by their palettes. We also show that if $f$ is a proper edge coloring of the hypercube $H_n$ ($n\ge 5$), then $n$ colors suffice to distinguish all vertices by their palettes.

11 pages, 6 figures