ELI5: Explain Like I'm 5

Collocation method

Okay kiddo, you know how sometimes when you're putting together a puzzle, you need to put certain pieces next to each other to make it look right? Well, in math and science, there are some problems that involve finding the right pieces of a puzzle, but instead of it being a physical puzzle, it's a problem with lots of numbers and equations.

This is where a collocation method comes in. It's like a puzzle solver that helps figure out what the right pieces, or solutions, are for the problem. The way it works is by breaking the problem down into smaller pieces and then finding the best way to fit those pieces together.

Think of it like this: let's say you're trying to solve a math problem that involves figuring out if two lines on a graph intersect. You know the equation for both lines, but you're not sure where they cross each other. So, you decide to break the problem down into smaller parts - first, you find the points where each line crosses the x-axis. Then, you can try to match those points up to find where the lines intersect.

A collocation method works kind of the same way. Instead of finding x-intercepts, though, it looks for specific "points" (or "collocation points") where certain equations meet. Once it's found those points, it tries to match them up to find the best solution to the problem.

It might sound a bit complicated, but basically a collocation method is just a fancy way of solving tricky problems using smaller, more manageable pieces.