I'll use the same notation.

And that notation is Sigma notation.

This is another function notation of writing this exact same thing.

It's just all notation there's nothing particular about notation.

Sigma notation up.

This is another notation.

I always forget notation.

Yeah, see that notation?

And then the sample mean is essentially the same thing, although you use slightly different notation.

And I'll introduce my notation.

This is just my notation.

I'm just making up notation.

These are all equivalent notation.

This is just different notation.

We've seen this notation before.

And the notation is PV

Very, very specific encrypted notation.

Same thing, but I like to think of it this way because it's not a new notation.

And it's a very subtle notation.

Write your answer using exponential notation.

This is just a Leibniz notation.

That's what this sigma notation is.

This is, I believe, Leibniz's notation.

I have all the sigma notation.

This is just notation right here

Prime factorization, and they say exponential notation.

We'll worry about the exponential notation later.

This is just the notation they use.

Let me write it in set notation.

I shouldn't be lazy with my notation.

And how do you use Sigma notation?

And this is a very unconventional notation.

Let me just write our formal notation.

Maybe I should put a vector notation.

If I wanted more traditional function notation