Field
Graph theory
The study of graphs: structures made of vertices connected by edges, used to model relationships of every kind.
Updated Nov 4, 2026 · 1 min read · 4 connections
- Origin
- 1736
- Founder
- Leonhard Euler
- Core objects
- Vertices and edges
Origins
The field began with Leonhard Euler’s solution to the Seven Bridges of Königsberg problem in 1736, which showed that the layout of land and bridges mattered only as a pattern of connections.
Applications
Graphs describe road networks, social networks, molecules, and the web. Many algorithms are defined on them, and a neural network is itself a weighted graph.
GraphityHQ is a graph too: each entry is a vertex, and each link between entries is an edge.