ELI5: Explain Like I'm 5

Minor (graph theory)

Okay kiddo, let me explain what a minor in graph theory is. First, let's imagine we have a bunch of dots and lines connecting them, just like a spiderweb.

Now, if we take some of these dots and lines and "squeeze" or "collapse" them down into a smaller, more condensed version, we get what's called a minor. It's like taking a picture of part of the spiderweb and zooming in really close to see just a few dots and lines.

This can be useful in graph theory because it can help us understand different properties of the original spiderweb. For example, if we can find a minor that looks like a certain type of spiderweb, we can say that the original spiderweb also has that same property.

Think of it like this - if you have a bucket of legos and you take out some of the pieces and build a smaller structure with them, you can learn about how the pieces fit together and how they create different shapes. Minor in graph theory is kinda like building a smaller structure from a larger one to learn about its parts.