拟周期系统的Floquet理论

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The Floquet Theory for Quasi-Periodic Linear System

摘要: 在这篇文章,我们对拟周期系统dx/dt=A(ω₁t,ω₂t.…,ω_mt)x (0.1)建立了Floquet理论.其中n×n方阵A(u₁,u₂,…,u_m)是u₁,u₂,…,u_m以2π为周期的周期方阵,同时假定A(u₁,u₂,…,u_m)∈C^τ,τ=(N+1)τ₀,τ₀=2(m+1),N=1/2n(n+1).我们定义了(0.1)的特征指数根β₁,β₂,…,β_n,假设下式成立:其中K(ω),K(ω,β)>0,k_μ,i_v是整数,k₁,k₂…,k_m不全为零:i²=-1.那末有拟周期线性变换,把(0.1)化为常系数的线性系统.

Abstract: In this paper we establish the Floguet theory for the quasi-periodic system where A(u₁,u₂...u_m) is an nxn periodic matrix function ofwith period 2π, and it is of C^τ, τ=(N+1)τ₀, τ₀=2(m+1), N = (1/2)n(n+l).Meanwhile, we define the characteristic exponential roots β₁,β₂,…,β_n of (0.1), and assume that where K(ω), K(ω,β)->0. k_u, i_v, are integers, all the integers k₁,k₂,…,k_m,k_m are not zero, ,rhen therequasi-periodic linear transformation, which carries (0.1) into a linear system with constant coefficients.

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