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# How do I find the additive identity matrix?

The sum between two matrices can be done if and only if the two matrices are **similar**, that means that they have the same numbers of rows and columns.

Also the additive has to be **similar** to the other, so every **shape** of matrix has its identity matrix.

The elements, obviously, are **all** .

E.G.

The matrix with the shape: 3 rows and 4 columns has this identity matrix:

##0000## ##0000## ##0000##