Given the following matrices, evaluate B + C

Question

anonymous · Answer

attachment

anonymous · Answer

matrices have to have the same dimensions for you to add them.

anonymous · Answer

as number of columns in  B is not equal to number of columns of C therefore i think we cant add them.

amistre64 · Answer

ever hear of a kronecker sum in your material?

anonymous · Answer

@amistre64 what's a kronecker sum?

anonymous · Answer

same question as mattvlaw.

amistre64 · Answer

http://www.proofwiki.org/wiki/Definition:Kronecker_Sum

amistre64 · Answer

it seems to be a way to add matrixes of different dimensions

anonymous · Answer

reading that it looks like it's the sum two kronecker products each with dimension nmxnm, by the definition of a kronecker product listed there.  of course this is from a 10 minute read through, so I can't claim to be correctly understanding the concept, but it looks like the two matrices in the sum should have the same dimension, right?

amistre64 · Answer

hard to say; there is an identity matrix of A multiplied to B and vise versa such that the 2 Kproducts can be added.

But then again im not sure if this is applicable here if they havent gone over kronecker stuff.