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[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.4
(1). The singular value decomposition leads tot eh polar decomposition: Every operator $A$ can be written as $A=UP$, where $U$ is unitary and $P$ is p...
分类:其他好文   时间:2014-11-18 13:20:04    阅读次数:211
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.2
Show that the following statements are equivalent: (1). $A$ is positive.
分类:其他好文   时间:2014-11-18 13:17:56    阅读次数:186
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.8
For any matrix $A$ the series $$\bex \exp A=I+A+\frac{A^2}{2!}+\cdots+\frac{A^n}{n!}+\cdots \eex$$ converges. This is called the exponential of $A$. T...
分类:其他好文   时间:2014-11-18 13:14:41    阅读次数:199
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.5
Show that matrices with distinct eigenvalues are dense in the space of all $n\times n$ matrices. (Use the Schur triangularisation)
分类:其他好文   时间:2014-11-18 13:12:08    阅读次数:174
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.7
The set of all invertible matrices is a dense open subset of the set of all $n\times n$ matrices. The set of all unitary matrices is a compact subset ...
分类:其他好文   时间:2014-11-18 13:09:44    阅读次数:120
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.3
(1). Let $\sed{A_\al}$ be a family of mutually commuting operators. Then, there exists a common Schur basis for $\sed{A_\al}$. In other words, there e...
分类:其他好文   时间:2014-11-18 13:08:29    阅读次数:168
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.1
For fixed basis of in $\scrH$ and $\scrK$, the matrix $A^*$ is the conjugate transpose of the matrix of $A$.
分类:其他好文   时间:2014-11-18 13:08:12    阅读次数:195
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.6
If $\sen{A}<1$, then $I-A$ is invertible, and $$\bex (I-A)^{-1}=I+A+A^2+\cdots, \eex$$ aa convergent power series. This is called the Neumann series.
分类:其他好文   时间:2014-11-18 13:07:47    阅读次数:151
ImageView根据手势进行缩放,拖动
?? package com.example.scale; import android.content.Context; import android.graphics.Matrix; import android.graphics.PointF; import android.util.AttributeSet; import android.util.FloatMath; im...
分类:其他好文   时间:2014-11-17 17:49:19    阅读次数:149
Android图片缩放,压缩总结(inSampleSize,Matrix比较)
Android中经常会遇到需要对图片进行缩放及压缩的操作,下面列出3种图片缩放方法: 一.图片缩放 1.inSampleSize(采样率) 优点:效率较高,解析速度快 缺点:采样率inSampleSize的取值只能是2的次方数(例如:inSampleSize=15,实际取值为8;inSampleSize=17,实际取值为16;实际取值会往2的次方结算),因此该方法不能精确的指定图片的大小...
分类:移动开发   时间:2014-11-17 15:50:34    阅读次数:176
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