ELI5: Explain Like I'm 5

Closure algebra

Closure algebra refers to a set of rules that help us figure out what happens when we combine or perform operations on different things. It's like a system that tells us what we can and can't do when we're playing with toys or building blocks.

When we talk about closure algebra, we're usually talking about sets of numbers or mathematical objects. These sets can include things like whole numbers, fractions, decimals, or even more complicated things like matrices or functions.

The rules of closure algebra tell us that when we combine two things from a set using a certain operation (like addition, subtraction, multiplication, or division), the result will also be a part of that same set. So, for example, if we take two whole numbers and add them together, the answer will also be a whole number.

These rules also tell us that certain properties will always hold true, no matter what kinds of things we're working with. For example, adding or multiplying two things together will always give us the same result, no matter what order we do the operations in.

Overall, closure algebra helps us understand how different mathematical objects can be combined or operated on in a way that keeps them in the same "family" of objects. It's like a set of rules for building with Legos - we can only put certain pieces together in certain ways, but there are still endless possibilities for creating something new and exciting.