ELI5: Explain Like I'm 5

Exceptional Jordan algebra

Okay kiddo, so you know what numbers are right? Like 1, 2, 3...right? Well, we can add these numbers together and also multiply them. But what if we don't want to multiply them like we usually do? What if we want to multiply them in a different way, like this:

1 * 2 = (1+2) + (1-2) = 3-1

This is called a "Jordan product" and it gives us a different answer than if we just multiplied normally.

Now suppose we have some certain rules for this special way of multiplying called a "Jordan algebra". These rules are really important because they make sure that we can do math with these special products in a really nice way. And when we have a Jordan algebra that follows certain special rules, we call it an "exceptional Jordan algebra".

This exceptional Jordan algebra is super important in some areas of math, like geometry and physics. It lets us do complicated calculations more easily and understand more about the world around us. So even though it might sound a little confusing, it's really cool and helps us learn more about how things work!