GraphSuch

GraphSuch is an open‑source software library designed for the representation, manipulation, and analysis of graph data structures. It was first released in 2018 under a permissive BSD licence by a team of researchers at the Technical University of Munich. The project was motivated by the need for a lightweight, well‑documented alternative to larger scientific graph libraries such as GraphX and NetworkX, with a focus on clarity and ease of use in teaching and competitive programming environments.

The library provides efficient implementations of a wide range of fundamental graph algorithms, including depth‑first search, breadth‑first search, Dijkstra’s shortest path, Bellman‑Ford, Kruskal’s minimum spanning tree, and the Hopcroft‑Karp bipartite matching algorithm. In addition to algorithms, GraphSuch includes support for directed, weighted, and hypergraph representations, as well as utilities for parsing common graph file formats like GraphML, GML, and an adjacency list format used by the ACM Algorithmic Library.

GraphSuch is written in C++ with a minimal C++17 dependency footprint, and exposes a clean API that can be bound to high‑level languages such as Python and Ruby via lightweight wrappers. The documentation contains an extensive tutorial section, a handful of example programs, and performance benchmarks that demonstrate the library’s suitability for graphs with millions of vertices and edges on commodity hardware.

The project is actively maintained, with regular releases that introduce new functionality for advanced topics such as planar graph embeddings, dynamic connectivity, and incremental shortest‑path updates. A community forum and issue tracker onboard contributions from researchers, students, and developers worldwide. Because of its high‑quality code base and active support, GraphSuch is frequently cited in academic literature and used in introductory courses on graph theory and algorithm design.