Writing down Mathematics with Arrays

1. Dec 19, 2009

dimensionless

I know how to do basic matrix operations, but sometimes I do calculations on computers and do array operations. How do I write down array operations on paper? For example, say I have two matrices, A and B, and I want to multiply them element by element.

2. Dec 19, 2009

rochfor1

3. Dec 19, 2009

Integral

Staff Emeritus
What you really want is the ordinary product at the top of the linked wiki article.

4. Dec 19, 2009

rochfor1

He seems to want to multiply them element-wise, which is was the Schur product is for.

5. Dec 19, 2009

dimensionless

So if I take the Schur product of A and B to get C, do I write

$$A \cdot B = C$$

As far as notation goes, this looks exactly like a dot product.

6. Dec 19, 2009

rochfor1

You can use whatever notation for you that you want. What's important is that you know you're talking about the Schur product. I've seen some people use $$A *_S B$$.