Summary textbook: Varian, Hal R., 1992, Microeconomics Analysis, 3rd ed. Mas-Colell, A., M. Whinston, and J. Green, 1995, Microeconomics Theory. assignments: twice a week; Team work; Deliver on the class

定义:对于An,若有B满足AB=BA=E,则称A为可逆矩阵, 且B为A的逆矩阵,记作A-1=B 定理1若A为可逆矩阵,则A的逆矩阵唯一 证设B与C都是A的逆矩阵,则有

定义1设a1,a2,…,am,β是一组n维 向量,若存在m个实数k1,k2,…km使得 β=ka1+k2a2++kmam,则称β可以 由a1,a2,…,an线性表示( linear representation).或称a1,a2,…,an线性 表示(linear generate) 例如:a1=(1,2,0)T,a2=(1,0,3)T,a3= (3,4,3)T,则a3=2a1+a2,即存在实数k =2,k2=1使得a3=ka1+k2a2,故a3可以 由a1,a2线性表示。(大家想一想,这里的常 数k1=2,k2=1是怎么求出来的?)

一.选择题（每题3分共15分） 1.AutoCAD样板图形文件默认的文件名后缀是（ ）。 a DWT b DXF c TXT d DWG 答案：a

This chapter discusses privately owned forests and timber management in a market economy, including : (1) private property rights and tenure (2) landowner objectives (3) landowner characteristics (4) markets (5) government policies impacts

1 Motivation SLIDE 1 Consider a standard second order finite difference discretization of V-u= on a regular g 1.2. and 3 dimensions 1.1 1D Finite differences

3Newton's' rings牛顿环 equipment: microscope A-a lens of radius of curvature R B-an accurately plane glass plate Interference pattern:

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《大学英语读写》课程教学资源（A）Ⅱ_大学英语读写（A）Ⅱ_步进PPT_Unit 3 art for art's sake