ELI5: Explain Like I'm 5

Class field theory

Do you know what a field is? It's a bunch of numbers, kind of like a playground full of kids. Just like the playground has rules, like no hitting and taking turns, fields have rules too - like how you can combine the numbers, called operations.

Now, imagine you have a special kind of field that's like a secret clubhouse - you have to know a secret password to get in. This special field is called a "class field."

Class field theory is all about figuring out the rules for this special field and understanding how it works. We study how the numbers in this field interact with each other, and we try to unlock the secrets of the password that lets us in.

It's kind of like a fun treasure hunt, where we explore this special field and discover all its hidden secrets. But it can also be pretty complicated, so we need to put on our thinking caps and work hard to unravel all the mysteries of class field theory.