The eigen values of a skew-symmetric matrix are
(a) Always zero (c) Either zero or pure imaginary
(b) always pure imaginary (d) always real
if a matrix is skew symmetric then the elements in diagonal should be zero.
A= |0 q|
|r 0|
Now solving for k |A-ki|=0, where i is identity matrix, we get q=0, r=0, how does this tell us about the eigen values k
PS: can't use lambda, so im using k here