Let T:V 6V be the adjacency operator of the Petersen graph as illustrated in the enclosed file. Here V is the vector spa
Posted: Thu Feb 17, 2022 11:07 am
Let T:V 6V be the adjacency operator of the Petersen graph as illustrated in the enclosed file. Here V is the vector space of all formal real linear combinations of the vertices V1 , ..., V10 of the Petersen graph. 1. Show that the subspace spanned by u = V1 + V2 + V3 +34 + Vs and w = vg + % + V8 + vg + v10 is stable under T, by calculating T(u) and T(w) explicitly. 2. Use part 1 to calculate (by hand) an eigenvector for T satisfying T(U) = 3v, and an eigenvector satisfying T(v) = v. 3. (Extra credit). Use Pari to compute the spectrum of the adjacency operator T of the Petersen graph. What do you observe? 6 1 17 to UTC 8