Relativistic system (mathematics)

Okay kiddo, let's start by understanding what "relativistic system" means. It refers to something that changes based on how you look at it.

For example, imagine you and your friend are playing catch in a moving train. To you, the ball moves forward and back in a straight line. But to someone watching the train go by from outside, the ball is moving in a curve because the train is also moving. This difference is called "relativity."

Now, when we use math to study these types of situations, we call it "relativistic math." It's a type of math that takes into account how things change depending on how you look at them.

This comes in handy when we study things like particles that move really fast, like light. Because when things move that fast, they don't act like we'd expect them to in "regular" math. So we use relativistic math to get a better understanding of how they move and interact.

In summary, a relativistic system is something that changes depending on how you look at it, and we use a different kind of math to study it, called "relativistic math."