with x(0)=I exist and are unique on the time interval t E [ 0, 1] for allTER\.Then discrete time system(4. 1)with f(5)=r(, i)describes the evolution of continuous time system(4.)at discrete time samples. In particular, if a is continuous then so is f Let us call a point in the closure of X locally attractive for system(4. 1)if there exists

(1)曲线y=lnx上与直线x+y=1垂直的切线方程为y=x-1 【分析】本题为基础题型,相当于已知切线的斜率为1,由曲线y=lnx的导数为1可确定切点的坐标

本节试图抓住直线上的开区间、闭区间及其点的基本性质,予以一般化。 对ⅤEsR\,我们可以通过看是否有x的完整邻域含于E中将R\中点x分 为三类:

分布的上侧a分位数 1.正态分布的上侧a分位数设X~N(0,1),0ua)=a的数ua为标准正态分布的上侧a分位数;

Discount model is in terms of conditional moments The first order condition is,u'( BE, [u'(c )x 1] The expectation is conditional expectation on investor's time t information; The basic pricing equation is P, =E, (m +1X1+)

我想这几次跟大家讲一点微积分在几何上的应用.这是非常要紧的发展 那么,从最简单的情况开始,我们就讲平面上的曲线.假设平面上有一条曲 线x(t)=(x(t),2()即在这个图上所在的情况.用微积分的话呢,就是这 条曲线有条切线

Ch. 4 Asymptotic Theory From the discussion of last Chapter it is obvious that determining the dis- tribution of h(X1, X2, . . Xr) is by no means a trival exercise. It turns out that more often than not we cannot determine the distribution exactly. Because of the importance of the problem, however, we are forced to develop approximations the subject of this Chapter

一、平面简谐波的波函数 介质中任一质点(坐标为x)相对其平衡位置的位移(坐标为y)随时间的变化关系,即y(x,t)称为波函数

2003年考研数学(四)真题评注 一、填空题(本题共6小题,每小题4分,满分2分把答案填在题中横线上) (1)极限lim[1+ln(1+x)]x=e2

1.掌握 Mac OS X 的基本使用。 2.学会使用多媒体工具软件。 3.学会 Internet 的配置和浏览