Linked from
The 15 pages that link to Edge coloring, each with the reason it gives.
Ramsey theoryRelated: The basic finite Ramsey problem asks what colored edges force.
Line graphRelated: Edge coloring becomes vertex coloring of the line graph.
Kőnig's theoremRelated: Bipartite edge-coloring results use repeated matchings as color classes.
Edge coverCompared with: Edge coloring organizes conflicts among edges instead of covering vertices.