Abstract
We give a simple example of two countable sets $X$ and $Y$ of real numbers such that their upper box-counting dimension satisfies the strict inequality $\dim_B(X\times Y)\lt\dim_B(X)+\dim_B(Y)$.
Citation
Eric J. Olson. James C. Robinson. "A Simple Example Concerning the Upper Box-Counting Dimension of a Cartesian Product." Real Anal. Exchange 40 (2) 449 - 454, 2015.
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