By constructing Liapunov functions and building a new inequality, we obtain two kinds of sufficient conditions for the existence and global exponential stabilit
Let P be an inner point of a convex N-gon ΓN: A1A2 …ANA1(N≥3), and let di,k denote the distance from the point Ai+k to the line PAi(i=1,2,… ,N, Ai=Aj(→)i≡
1 Introduction Let f be a holomorphic cusp form for the group Γ = SL2(Z) of even integral weight k, with Fourier coefficients af(n):f(z) = ∑n>0 af(n)e(nz).