Complex sentence: In the mathematical field of graph theory, a prism graph is a graph that has one of the prisms as its skeleton, sometimes represented by "Y" "n" with 2 "n" nodes and 3 "n" edges.
Split into simpler sentences: In the mathematical field of graph theory, a prism graph is a graph that has one of the prisms as its skeleton. The graph of an "n"-gonal prism has 2 "n" vertices and 3 "n" edges.