For example, I want to this to happen: $$\begin{bmatrix}1& 2& 3\end{bmatrix}\times\begin{bmatrix}2& 3& 4\end{bmatrix} = \begin{bmatrix}2& 6& 12\end{bmatrix}$$ It's not exactly matrix multiplication, but I hope you can see what I'm getting at. Is there some notation in linear algebra that allows this function to be valid?


2 Answers 2


I believe what you are describing is called the Hadamard product. You can read about them and see some notation for using them on the Wikipedia page. https://en.wikipedia.org/wiki/Hadamard_product_(matrices)

This page uses the notation $\circ$ for the Hadamard product.

  • $\begingroup$ That is what I know it as. $\endgroup$
    – Carser
    Aug 15, 2016 at 12:55

I don't know any standard matrix operation of this kind. You can rewrite the three entries of the $1\times 3$ matrices as diagonal elements of a $3 \times 3$ matrix, than perform the standard matrix multiplication.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.