Hadamard Product of Matricies

Let A , B : [ m ] × [ n ] M : 𝐴 𝐵 delimited-[] 𝑚 delimited-[] 𝑛 𝑀 A,B:[m]\times[n]\to M be a pair of Matrices over a Monoid. The Hadamard Product A B : [ m ] × [ n ] M : direct-product 𝐴 𝐵 delimited-[] 𝑚 delimited-[] 𝑛 𝑀 A\odot B:[m]\times[n]\to M is the matrix formed by taking the elementwise product of A 𝐴 A and B 𝐵 B .

Properties

The Hadamard product is associative and unital with respect to the matrix containing only \varepsion \varepsion \varepsion .

If M 𝑀 M is commutative, then the Hadamard product is also commutative. If the two matrices are taken over a Ring R 𝑅 R , then the Hadamard product is distributive with respect to Addition of Matrices.