Proving

selfAdjoint

For the first one, study the definition your book or notes gives for "nonsingular". Look at it again. How does that definition bear of the product AB = 0?

For the second one, do they give you a method for finding the inverse of a square matrix? What happens in that method when a_ij = a_ji for all i and j?

selfAdjoint Recognitions: Gold Member Staff Emeritus	For the first one, study the definition your book or notes gives for "nonsingular". Look at it again. How does that definition bear of the product AB = 0? For the second one, do they give you a method for finding the inverse of a square matrix? What happens in that method when a_ij = a_ji for all i and j?