Special Classes of Polyominoes

Several classes of polyominoes are well-studied. This page shows the hierarchy of some of these special classes.

Sections stacked on top of each other have a hierarchial relationship: for example, all stack polyominoes are bar graphs.

Additionally, polyominoes with equivalent boundary strings are grouped together.

Rectangle

Ferrers graph

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Staircase

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Stack

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Directed convex

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Bar graph

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Convex

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Directed semi-convex

Semi-convex

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Directed

Other