线性规划消耗系数矩阵灵敏度分析的某些探讨

讨论了线性规划模型中 ,消耗系数矩阵 A中某个基变量或某个约束方程的系数向量变化以及增减约束方程时 ,对最优基、最优解、目标函数值和影子价格的影响 .  

一道数学竞赛题证法的探究及推广

如图1，△ABC内接于⊙O，AC〉BC，点D为ACB的中点，求证：AD^2=AC·BC＋CD^2．  

关于单调亚紧空间

In the first part of this note, we mainly prove that monotone metacompactness is hereditary with respect to closed subspaces and open Fó-subspaces. For a generalized ordered (GO)-space X, we also show that X is monotonically metacompact if and only if its closed linearly ordered extension X* is monotonically metacompact. We also point out that every non-Archimedean space X is monotonically ultraparacompact. In the second part of this note, we give an alternate proof of the result that McAuley space is paracompact and metacompact.  

环F_q+uF_q+vF_q上的斜循环码和LCD码（英文）

本文研究了环R=F_q+uF_q+vF_q(u~2=u,v~2=v,uv=vu=0)上的斜循环码和LCD码,其中q为素数幂.利用线性码与其对偶码在环R上的分解,得到了环R上斜循环码及其对偶码的生成多项式.最后,讨论了环R与有限域F_q上LCD码的关系,通过环R到域F_q~3的Gray映射,得到了环R上LCD码的Gray像是F_q上的LCD码.