An SPQR tree is a data structure used in graph theory, specifically for the representation of a decomposition of a triconnected graph. It plays a crucial role in understanding the structural properties of graphs and is particularly useful in applications involving planar graphs. The name "SPQR" comes from the three types of components in the decomposition: 1. **S** - Represents a biconnected component (also known as a 2-connected component).
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