ELI5: Explain Like I'm 5

List edge-coloring

Imagine you have a big coloring book with pictures of roads and intersections. Each road has two ends and is called an edge. Now, imagine you have a bunch of different colored crayons and you want to color in the edges of the roads in such a way that no two edges that touch each other have the same color.

This is what we call list edge-coloring. Each edge has a list of available colors, and we have to pick a color from that list without repeating the same color for any two adjacent edges.

It's like a game of matching colors where you have to make sure that all the lines connected don't have the same color. It's like a puzzle!