ELI5: Explain Like I'm 5

Krull–Schmidt theorem

Okay kiddo, let's imagine we have a bunch of toys that we can put together to make one big toy. Now, the Krull-Schmidt Theorem tells us that no matter how many toys we start with, we can always break them apart into simpler toys that are kind of like building blocks.

But here's the cool part - we can break them apart in different ways, and we'll always end up with the same final toy! Just like how we can build a tower out of blocks stacked up in different ways and it will still be a tower in the end. This is called the 'decomposition' of our toys.

So basically, the Krull-Schmidt Theorem helps us understand how we can break down complex objects into simpler pieces in different ways, and still end up with the same final result. Pretty neat, huh?