2-Convex Polyominoes: Non-Empty Corners
Khalil Tawbe, Nadine Ghandour, Ali Atwi · Open Journal of Discrete Mathematics · 2019
A polyomino P is called 2-convex if for every two cells there exists a monotone path included in P with at most two changes of direction. This paper studies the geometrical properties of a sub-class of 2-convex polyominoes called where the upper left corner and the lower right corner of the polyomino each contains only one cell.