Hi,

I'm supposed to compute the matrix exponential, e^A, for several matrices (for example,A=

(1 1)

(-1 -1)

I know that when I solve for its eigenvalues i get lambda=0. So then I evaluate the null space of A-Ilambda for lambda=0. Also, my diagonal matrix will be

(e^0 0)

(0 e^0) which is the identity matrix

Solving for (A-O)x=0

(1 1|0)

(0 0|0)

so i get (1,-1)^T twice. So then i should have another matrix X=

( 1 1 )

(-1 -1)

but X doesn't have an inverse . What did I do wrong?