Let {Nt}t>/0be a Markov chain such that N0 = 0 and
P(m,n)= (e^(m-n-1/e))/(n-m)!

Find the conditional distribution of (Nt+1-Nt) given Nt=m

P/S : Does P(m,n) means that it's one step transition from m to n?

Thanks