Math Problem Statement
对于实数T>0,称欧氏平面R2的子集为T稠密的,如果对任意v∈R2,存在w∈满足lv-wl≤T.设2阶整方阵A∈M2(Z)满足det(A)≠0.(1)假设tr(A)=0.证明存在C>0,使得对任意正整数n,集合 AnZ2:={A"v:v∈Z2}是Cdct(A)川m/2.稠密的.(2)假设A的特征多项式在有理数域上不可约.证明与(1)相同的结论.注:这里R2和Z2中的向量约定为列向量,R2中的内积为标准内积,即(U,w)=vw.(挑示:在对(2)的证明中,可使用如下[inkowskir凸体定理的特殊情形:R2中以原点为中心且面积为4的任意闭平行四边形中总包含Z2中的非零向量.)
Solution
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Math Problem Analysis
Mathematical Concepts
Linear Algebra
Matrix Theory
Number Theory
Formulas
Minkowski Convex Body Theorem
Theorems
Minkowski Convex Body Theorem
Suitable Grade Level
Advanced Undergraduate
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