An aperiodic perfect map (APM) is an array with the property that each possible array of certain size, called a window, arises exactly once as a subarray in the array. In this article, we give some constructions which imply a complete answer for the existence of APMs with \(2 \times 2\) windows for any alphabet size.
Citation
Sang-Mok Kim. On the Existence of Aperiodic Perfect Maps for \(2 \times 2\) Windows[J], Ars Combinatoria, Volume 065. 111-120. .