I would like to understand how the following fact : detA⋅I n ⋅adj(adj(A))=(detA) n−1 ⋅A
allows us to determine/assert that if A isn't invertible then (adj(adj(A)) = 0.
If A isn't invertible I can't devide by detA.....
Thanks , Guy
I would like to understand how the following fact : detA⋅I n ⋅adj(adj(A))=(detA) n−1 ⋅A
allows us to determine/assert that if A isn't invertible then (adj(adj(A)) = 0.
If A isn't invertible I can't devide by detA.....
Thanks , Guy
As you already noted: This is not possible but it is not claimed in the link you provided.