Question

What are the dimensional requirements for matrix multiplication?

Answer 1

number of columns of left side matrix = number of rows of right side matrix

Explanation:

Consider two matrix as `A^(m times n)` and `B^(p times q)`

Then `AB` will be a matrix of dimensions `m times q` if `n=p`.

So if the number of columns of left side matrix is same as the number of rows of right side matrix then multiplication is permissible.