ELI5: Explain Like I'm 5

Abstract additive Schwarz method

Okay kiddo, let's talk about something called the abstract additive Schwarz method. This is a way to solve really big math problems like equations that have a ton of different parts to them.

Imagine you have a puzzle with lots of little pieces, and you want to put it together but it's too big to do all at once. What would you do? Well, you could take it apart into smaller sections and focus on putting each section together one at a time. That's sort of like what the abstract additive Schwarz method does.

It breaks down the big math problem into smaller pieces, called sub-problems. Then it solves each sub-problem one at a time, kinda like putting together the smaller puzzle pieces.

But here's the catch: each sub-problem still affects the other sub-problems in some way, like how one puzzle piece affects the other pieces around it. So, as the method solves each sub-problem, it uses that solution to improve the solutions for the other sub-problems.

This way, the method can solve really big problems faster than if it just tried to solve everything at once. And that's the abstract additive Schwarz method in a nutshell!