Arc diagram

An arc diagram is a style of graph drawing, in which the vertices of a graph are placed along a line in the Euclidean plane and edges are drawn using semicircles or other convex curves above or below the line. These drawings are also called linear embeddings or circuit diagrams.

Applications of arc diagrams include information visualization, the Farey diagram of number-theoretic connections between rational numbers, and diagrams representing RNA secondary structure in which the crossings of the diagram represent pseudoknots in the structure.