ELI5: Explain Like I'm 5

Distribution (number theory)

Ok kiddo, let's talk about distribution in number theory.

Do you know what numbers are? They are like counting words that we use to identify how many things we have.

Now, let’s say we want to know how many odd numbers are there between 1 and 10. We can count them and we’ll find that there are 5 odd numbers: 1, 3, 5, 7, and 9.

But what if we want to know how many odd numbers are there between 1 and 1000? That’s too many to count by hand.

This is where we can use distribution in number theory. It helps us understand how numbers are spread out or distributed across a range of values.

One way to represent this is with a graph. Imagine a number line from 1 to 1000. We can mark all the odd numbers with a dot and all the even numbers with a square.

If we draw this graph, we’ll see that there are more dots than squares. This is because there are more odd numbers than even numbers between 1 and 1000. We call this an “uneven distribution” because there are more numbers in one category than in the other.

But what if we want to know how many prime numbers are there between 1 and 1000? This is a little trickier because prime numbers are only divisible by 1 and themselves.

If we add up all the prime numbers between 1 and 1000, we’ll find that there are 168 of them. We call this a “sparse distribution” because the numbers are spread out and there aren’t too many of them in one place.

So, that’s distribution in number theory! It helps us understand how numbers are distributed or spread out across a range of values.