Description:of the coordinates of the second largest eigenvalue Xv (A) of A. The functional F3(c) is defined similarly: p(S) p(S). – nin(s)s(%-2%)). p(S). One can prove ([75]) that f(c) > F3(c) > X. (A). 21 [3] D. Aldous, Lower bounds for covering times for reversible Markov chains and random walks on graph