Nilpotent matrix/Exponential mapping/Properties/Exercise

Let , and let a field of characteristic be fixed. For a nilpotent -matrix , let be defined by


a) Show that for commuting nilpotent matrices , the equality

holds.


b) Show that for a nilpotent matrix , the matrix is invertible.


c) Show that for a nilpotent matrix , the matrix is unipotent.