标签: MATH4100

数学代写|复分析作业代写Complex function代考|Math4100

如果你也在 怎样代写复分析Complex analysis 这个学科遇到相关的难题,请随时右上角联系我们的24/7代写客服。复分析Complex analysis数学的一个分支,研究复数及其函数和微积分。简单地说,复分析是将实数微积分扩展到复域。我们将把微积分中熟悉的连续性、导数和积分的概念扩展到复变量的复函数中。

复分析Complex analysis基本成分是解析函数,或者我们在微积分中熟知的可微函数。任何复数z都可以被认为是平面(x,y)上的一个点,所以z = x+ y,其中i=√-1。以类似的方式,复变量z的任何复函数都可以分为两个函数,如f(z)=u(z)+iv(z),或f(x,y)=u(x,y)+iv(x,y)。显然,这样的函数依赖于两个自变量,并且有两个可分离的函数,因此绘制函数需要一个四维空间,这是难以想象的。

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数学代写|复分析作业代写Complex function代考|Math4100

数学代写|复分析作业代写Complex function代考|Fixed End Point Homotopy

Consider the rectangle
$$
R={t+\text { is } \in \mathbb{C}: t \in[a, b], s \in[0,1]}
$$
DEFINITION 9.8. Two paths $\gamma_0:[a, b] \rightarrow D$ and $\gamma_1:[a, b] \rightarrow D$ are fixed end point homotopic in $D$ if there is a continuous map
$$
\phi: R \rightarrow D
$$
and points $z_0, z_1 \in \mathbb{C}$ such that
$$
\begin{array}{ll}
\phi(t, 0)=\gamma_0(t) & \text { for all } t \in[a, b] \
\phi(t, 1)=\gamma_1(t) & \text { for all } t \in[a, b] \
\phi(s, 0)=z_0 & \text { for all } s \in[0,1] \
\phi(s, 1)=z_1 & \text { for all } s \in[0,1]
\end{array}
$$
as in Figure 9.14.
If we let $\gamma_s(t)=\phi(t, s)$ then $\gamma_s$ is a path in $D$ from $z_0$ to $z_1$ for all $s \in[0,1]$, and as $s$ increases continuously from 0 to 1 , the path $\gamma_s$ ‘deforms continuously’ from $\gamma_0$ to $\gamma_1$.

数学代写|复分析作业代写Complex function代考|Closed Path Homotopy

Once more we consider the rectangle
$$
R={t+\mathrm{i} s \in \mathbb{C}: t \in[a, b], s \in[0,1]}
$$
but we impose different conditions on $\phi$ :
DEFinition 9.11. Two (closed) paths $\gamma_0:[a, b] \rightarrow D$ and $\gamma_1:[a, b] \rightarrow D$ are homotopic via closed paths in $D$ if there is a continuous map
$$
\phi: R \rightarrow D
$$

such that
$$
\begin{array}{ll}
\phi(t, 0)=\gamma_0(t) & \text { for all } t \in[a, b] \
\phi(t, 1)=\gamma_1(t) & \text { for all } t \in[a, b] \
\phi(a, s)=\phi(b, s) & \text { for all } s \in[0,1]
\end{array}
$$
as in Figure 9.16.

Again, if we define $\gamma_s(t)=\phi(t, s)$ then $\gamma_s$ is a closed path in $D$ for all $s \in[0,1]$, and as $s$ increases continuously from 0 to 1 , the path $\gamma_s$ ‘deforms continuously’ from $\gamma_0$ to $\gamma_1$.

Example 9.12. For $\left|z_0\right|<K$, let $D=\left{z \in \mathbb{C}:|z|<K, z \neq z_0\right}$. For $\left|z_0\right|<\rho<K$, let $\gamma_0(t)=\rho \mathrm{e}^{\mathrm{i} t}(t \in[0,2 \pi])$, and for $0<\varepsilon<K-\left|z_0\right|$ let $\gamma_1(t)=z_0+\varepsilon \mathrm{e}^{\mathrm{i} t}(t \in[0,2 \pi])$, as in Figure 9.17. Then $\gamma_0$ is homotopic to $\gamma_1$ via closed paths in $D$, where
$$
\phi(t, s)=(1-s) \gamma_0(t)+s \gamma_1(t) \quad(t \in[0,2 \pi], s \in[0,1])
$$

数学代写|复分析作业代写Complex function代考|Math4100

复分析代写

数学代写|复分析作业代写Complex function代考|Fixed End Point Homotopy

考虑矩形
$$
R={t+\text { is } \in \mathbb{C}: t \in[a, b], s \in[0,1]}
$$
定义9.8。如果存在连续映射,则两条路径$\gamma_0:[a, b] \rightarrow D$和$\gamma_1:[a, b] \rightarrow D$在$D$中是固定端点同伦的
$$
\phi: R \rightarrow D
$$
点$z_0, z_1 \in \mathbb{C}$这样
$$
\begin{array}{ll}
\phi(t, 0)=\gamma_0(t) & \text { for all } t \in[a, b] \
\phi(t, 1)=\gamma_1(t) & \text { for all } t \in[a, b] \
\phi(s, 0)=z_0 & \text { for all } s \in[0,1] \
\phi(s, 1)=z_1 & \text { for all } s \in[0,1]
\end{array}
$$
如图9.14所示。
如果我们让$\gamma_s(t)=\phi(t, s)$,那么$\gamma_s$是$D$从$z_0$到$z_1$的路径,对于所有$s \in[0,1]$,当$s$从0到1连续增加时,路径$\gamma_s$从$\gamma_0$到$\gamma_1$“连续变形”。

数学代写|复分析作业代写Complex function代考|Closed Path Homotopy

我们再考虑一下矩形
$$
R={t+\mathrm{i} s \in \mathbb{C}: t \in[a, b], s \in[0,1]}
$$
但是我们对$\phi$施加了不同的条件:
定义9.11。如果存在连续映射,则两条(闭)路径$\gamma_0:[a, b] \rightarrow D$和$\gamma_1:[a, b] \rightarrow D$通过$D$中的闭路径是同伦的
$$
\phi: R \rightarrow D
$$

这样
$$
\begin{array}{ll}
\phi(t, 0)=\gamma_0(t) & \text { for all } t \in[a, b] \
\phi(t, 1)=\gamma_1(t) & \text { for all } t \in[a, b] \
\phi(a, s)=\phi(b, s) & \text { for all } s \in[0,1]
\end{array}
$$
如图9.16所示。

同样,如果我们定义$\gamma_s(t)=\phi(t, s)$,那么对于所有$s \in[0,1]$, $\gamma_s$是$D$中的封闭路径,并且当$s$从0到1连续增加时,路径$\gamma_s$从$\gamma_0$到$\gamma_1$“连续变形”。

例9.12。对于$\left|z_0\right|<K$,让$D=\left{z \in \mathbb{C}:|z|<K, z \neq z_0\right}$。对于$\left|z_0\right|<\rho<K$,设$\gamma_0(t)=\rho \mathrm{e}^{\mathrm{i} t}(t \in[0,2 \pi])$,对于$0<\varepsilon<K-\left|z_0\right|$,设$\gamma_1(t)=z_0+\varepsilon \mathrm{e}^{\mathrm{i} t}(t \in[0,2 \pi])$,如图9.17所示。那么$\gamma_0$通过$D$中的闭合路径与$\gamma_1$同伦,其中
$$
\phi(t, s)=(1-s) \gamma_0(t)+s \gamma_1(t) \quad(t \in[0,2 \pi], s \in[0,1])
$$

数学代写|复分析作业代写Complex function代考 请认准statistics-lab™

统计代写请认准statistics-lab™. statistics-lab™为您的留学生涯保驾护航。

金融工程代写

金融工程是使用数学技术来解决金融问题。金融工程使用计算机科学、统计学、经济学和应用数学领域的工具和知识来解决当前的金融问题,以及设计新的和创新的金融产品。

非参数统计代写

非参数统计指的是一种统计方法,其中不假设数据来自于由少数参数决定的规定模型;这种模型的例子包括正态分布模型和线性回归模型。

广义线性模型代考

广义线性模型(GLM)归属统计学领域,是一种应用灵活的线性回归模型。该模型允许因变量的偏差分布有除了正态分布之外的其它分布。

术语 广义线性模型(GLM)通常是指给定连续和/或分类预测因素的连续响应变量的常规线性回归模型。它包括多元线性回归,以及方差分析和方差分析(仅含固定效应)。

有限元方法代写

有限元方法(FEM)是一种流行的方法,用于数值解决工程和数学建模中出现的微分方程。典型的问题领域包括结构分析、传热、流体流动、质量运输和电磁势等传统领域。

有限元是一种通用的数值方法,用于解决两个或三个空间变量的偏微分方程(即一些边界值问题)。为了解决一个问题,有限元将一个大系统细分为更小、更简单的部分,称为有限元。这是通过在空间维度上的特定空间离散化来实现的,它是通过构建对象的网格来实现的:用于求解的数值域,它有有限数量的点。边界值问题的有限元方法表述最终导致一个代数方程组。该方法在域上对未知函数进行逼近。[1] 然后将模拟这些有限元的简单方程组合成一个更大的方程系统,以模拟整个问题。然后,有限元通过变化微积分使相关的误差函数最小化来逼近一个解决方案。

tatistics-lab作为专业的留学生服务机构,多年来已为美国、英国、加拿大、澳洲等留学热门地的学生提供专业的学术服务,包括但不限于Essay代写,Assignment代写,Dissertation代写,Report代写,小组作业代写,Proposal代写,Paper代写,Presentation代写,计算机作业代写,论文修改和润色,网课代做,exam代考等等。写作范围涵盖高中,本科,研究生等海外留学全阶段,辐射金融,经济学,会计学,审计学,管理学等全球99%专业科目。写作团队既有专业英语母语作者,也有海外名校硕博留学生,每位写作老师都拥有过硬的语言能力,专业的学科背景和学术写作经验。我们承诺100%原创,100%专业,100%准时,100%满意。

随机分析代写


随机微积分是数学的一个分支,对随机过程进行操作。它允许为随机过程的积分定义一个关于随机过程的一致的积分理论。这个领域是由日本数学家伊藤清在第二次世界大战期间创建并开始的。

时间序列分析代写

随机过程,是依赖于参数的一组随机变量的全体,参数通常是时间。 随机变量是随机现象的数量表现,其时间序列是一组按照时间发生先后顺序进行排列的数据点序列。通常一组时间序列的时间间隔为一恒定值(如1秒,5分钟,12小时,7天,1年),因此时间序列可以作为离散时间数据进行分析处理。研究时间序列数据的意义在于现实中,往往需要研究某个事物其随时间发展变化的规律。这就需要通过研究该事物过去发展的历史记录,以得到其自身发展的规律。

回归分析代写

多元回归分析渐进(Multiple Regression Analysis Asymptotics)属于计量经济学领域,主要是一种数学上的统计分析方法,可以分析复杂情况下各影响因素的数学关系,在自然科学、社会和经济学等多个领域内应用广泛。

MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中,其中问题和解决方案以熟悉的数学符号表示。典型用途包括:数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发,包括图形用户界面构建MATLAB 是一个交互式系统,其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题,尤其是那些具有矩阵和向量公式的问题,而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问,这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展,得到了许多用户的投入。在大学环境中,它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域,MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要,工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数(M 文件)的综合集合,可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。

R语言代写问卷设计与分析代写
PYTHON代写回归分析与线性模型代写
MATLAB代写方差分析与试验设计代写
STATA代写机器学习/统计学习代写
SPSS代写计量经济学代写
EVIEWS代写时间序列分析代写
EXCEL代写深度学习代写
SQL代写各种数据建模与可视化代写

数学代写|MATH4100 Fourier analysis

Statistics-lab™可以为您提供unt.edu MATH4100 Fourier analysis傅里叶分析课程的代写代考辅导服务!

MATH4100 Fourier analysis课程简介

The goals for the course are to gain a facility with using the Fourier transform, both specific techniques and general principles, and learning to recognize when, why, and how it is used. Together with a great variety, the subject also has a great coherence, and the hope is students come to appreciate both.

PREREQUISITES 

Topics include: The Fourier transform as a tool for solving physical problems. Fourier series, the Fourier transform of continuous and discrete signals and its properties. The Dirac delta, distributions, and generalized transforms. Convolutions and correlations and applications; probability distributions, sampling theory, filters, and analysis of linear systems. The discrete Fourier transform and the FFT algorithm. Multidimensional Fourier transform and use in imaging. Further applications to optics, crystallography. Emphasis is on relating the theoretical principles to solving practical engineering and science problems.

MATH4100 Fourier analysis HELP(EXAM HELP, ONLINE TUTOR)

问题 1.

Theorem $4.5 \mathfrak{F}$ is an automorphism of $\leftrightarrows(\mathbb{R})^{\prime}$. The inverse Fourier transform $\mathfrak{F}^{-1}$ is its inverse.

Proof The linearity and the injectivity are clear. The surjectivity can be shown as follows. If $T$ is an element of $\leftrightarrows(\mathbb{R})^{\prime}$, then
$$
\hat{\tilde{T}}(\varphi)=\tilde{T}(\hat{\varphi})=T(\tilde{\hat{\varphi}})=T(\varphi) \text { for all } \varphi \in \Xi(\mathbb{R}) .
$$
This shows that $T$ is the Fourier transform of $\tilde{T} \in \Xi(\mathbb{R})^{\prime}$. Similarly, the inverse of $\mathfrak{F}$ is given by the inverse Fourier transform, since
$$
\left(\mathfrak{F}^{-1} \circ \mathscr{F}\right)(T)(\varphi)=T\left(\mathcal{F} \circ \mathcal{F}^{-1}\right)(\varphi)=T(\varphi) \text { for all } \quad T \in \widetilde{G}(\mathbb{R})^{\prime}, \varphi \in \mathbb{G}(\mathbb{R}) .
$$
Hence $\mathfrak{\&}^{-1} \circ \mathfrak{F}=I$ (identity).
$\tilde{F}$ and $\tilde{F}^{-1}$ are continuous (in the strong topology) in view of Theorem 4.4.
Remark 4.3 We use the notation $\check{\varphi}$ (or $\check{T}$ ) which means
$$
\check{\varphi}(x)=\varphi(-x), \quad \check{T}(\varphi)=T(\check{\varphi}) .
$$

问题 2.

Theorem 5.2 (shift operator and convolution) If $f \in \mathfrak{Q}^1(\mathbb{R}, \mathbb{C})$ and $k: \mathbb{R} \rightarrow \mathbb{C}$ is continuous and integrable, then ${ }^3$
$$
\int_{-\infty}^{\infty} k(x) \tau_x f d x=k * f .
$$

Proof Assume first that $f$ is continuous and $\operatorname{supp} f$ is compact. In this case, the integration on the left-hand side is actually evaluated on some finite interval. Hence
$$
\int_{-\infty}^{\infty} k(x) \tau_x f d x=\lim \sum_j\left(x_{j+1}-x_j\right) k\left(x_j\right) \tau_{x_j} f,
$$
where the limit is taken with respect to $q^1$-norm as the decomposition of the interval of integration becomes finer and finer. On the other hand, we have
$$
(k * f)(x)=\lim \sum_j\left(x_{j+1}-x_j\right) k\left(x_j\right) f\left(x-x_j\right) \quad \text { (uniform convergence). }
$$
Comparing (5.7) and (5.8), the proof is finished in this special case.
We shall now turn to the general case: $f \in \mathfrak{q}^1$. There exists, for any $\varepsilon>0$, some continuous function $g$ with compact support which satisfies $|f-g|_1<\varepsilon$. Since
$$
\int_{-\infty}^{\infty} k(x) \tau_x g d x=k * g
$$ as observed above, it follows that
$$
\int_{-\infty}^{\infty} k(x) \tau_x f d x-k * f=\int_{-\infty}^{\infty} k(x) \tau_x(f-g) d x+k *(g-f) .
$$

Textbooks


• An Introduction to Stochastic Modeling, Fourth Edition by Pinsky and Karlin (freely
available through the university library here)
• Essentials of Stochastic Processes, Third Edition by Durrett (freely available through
the university library here)
To reiterate, the textbooks are freely available through the university library. Note that
you must be connected to the university Wi-Fi or VPN to access the ebooks from the library
links. Furthermore, the library links take some time to populate, so do not be alarmed if
the webpage looks bare for a few seconds.

此图像的alt属性为空;文件名为%E7%B2%89%E7%AC%94%E5%AD%97%E6%B5%B7%E6%8A%A5-1024x575-10.png
数学代写|MATH4100 Fourier analysis

Statistics-lab™可以为您提供unt.edu MATH4100 Fourier analysis傅里叶分析课程的代写代考辅导服务! 请认准Statistics-lab™. Statistics-lab™为您的留学生涯保驾护航。

数学代写|MATH4100 Fourier analysis

Statistics-lab™可以为您提供unt.edu MATH4100 Fourier analysis傅里叶分析课程的代写代考辅导服务!

MATH4100 Fourier analysis课程简介

The goals for the course are to gain a facility with using the Fourier transform, both specific techniques and general principles, and learning to recognize when, why, and how it is used. Together with a great variety, the subject also has a great coherence, and the hope is students come to appreciate both.

PREREQUISITES 

Topics include: The Fourier transform as a tool for solving physical problems. Fourier series, the Fourier transform of continuous and discrete signals and its properties. The Dirac delta, distributions, and generalized transforms. Convolutions and correlations and applications; probability distributions, sampling theory, filters, and analysis of linear systems. The discrete Fourier transform and the FFT algorithm. Multidimensional Fourier transform and use in imaging. Further applications to optics, crystallography. Emphasis is on relating the theoretical principles to solving practical engineering and science problems.

MATH4100 Fourier analysis HELP(EXAM HELP, ONLINE TUTOR)

问题 1.

8.3 Given the nonzero samples of a signal,
$$
{x(-2)=2, x(-1)=-1, x(0)=3, x(1)=4}
$$
find its DFT from the DTFT.

问题 2.

8.6 Find the response, using the DTFT, of the system governed by the difference equation
$$
y(n)=x(n)-0.7 y(n-1)
$$
to the input $x(n)=\sin \left(\frac{2 \pi}{8} n-\frac{\pi}{6}\right)$.

问题 3.

8.7 Find the impulse response $h(n)$, using the DTFT, of the system governed by the difference equation
$$
y(n)=x(n)+3 x(n-1)+2 x(n-2)+y(n-1)-\frac{2}{9} y(n-2)
$$

问题 4.

8.8 Find the zero-state response, using the DTFT, of the system governed by the difference equation
$$
y(n)=x(n)-0.6 y(n-1)
$$
with the input $x(n)=(-0.8)^n u(n)$

Textbooks


• An Introduction to Stochastic Modeling, Fourth Edition by Pinsky and Karlin (freely
available through the university library here)
• Essentials of Stochastic Processes, Third Edition by Durrett (freely available through
the university library here)
To reiterate, the textbooks are freely available through the university library. Note that
you must be connected to the university Wi-Fi or VPN to access the ebooks from the library
links. Furthermore, the library links take some time to populate, so do not be alarmed if
the webpage looks bare for a few seconds.

此图像的alt属性为空;文件名为%E7%B2%89%E7%AC%94%E5%AD%97%E6%B5%B7%E6%8A%A5-1024x575-10.png
数学代写|MATH4100 Fourier analysis

Statistics-lab™可以为您提供unt.edu MATH4100 Fourier analysis傅里叶分析课程的代写代考辅导服务! 请认准Statistics-lab™. Statistics-lab™为您的留学生涯保驾护航。