# Element-wise batch matrix multiplication of each row of matrix with entire matrix

Hi,

I have two matrices of sizes (30, 24, 512) respectively where 30 is the batch size. Let us call them A and B.

Now what I need to do is this:

For every batch in A, I want to compute element-wise batch matrix multiplication of each row in a single batch of A with each row in a single batch of B and sum them.
In other words, for every batch, I have a (24, 512) matrix on left-hand side (A) and on right-hand side (B). Now for each row (1 * 512) in A, I want to compute element-wise matrix multiplication of that row with each of the (24 * 512) rows in B, one by one, and sum them.
This operation would thus result in a (1 * 512) sized vector.
Done for each row in A, it would result in a (24 * 512) sized matrix and then, done for each batch it would result in (30, 24, 512) sized matrix, which is the preferred dimension of my output.

How do I go about doing this?
I do not want to use for loops, since that would be inefficient. I also do not want to use â€śrepeatâ€ť method for the same reason.
Is there any other way of doing the same?

Any help will be appreciated.

Thank you!

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