Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Problem 3 (Inspired by Trefethen and Bau) Consider random mxm matrices whose entires are independent samples of the normal distribution with mean zero and standard

image text in transcribed

Problem 3 (Inspired by Trefethen and Bau) Consider random mxm matrices whose entires are independent samples of the normal distribution with mean zero and standard deviation m-1/2, i..e, sampled from N(0,1/m). In MATLAB, you can construct such matrices through A = randn(m)/sqrt(m); 1. Illustrate through well chosen plots what the "eigenvalues look like". You should do this for many matrices of the same size together, for instance 1000 such matrices of size 32 or 64. Use the MATLAB eig function to get the eigenvalues (note that these will in general by complex and thus your plots should be in the complex plane). What is the pattern? A few well chosen plots are much better than many poorly chosen ones. Make sure to clearly label all plots. 2. What can you say about the limiting behavior of the spectral radius (see Problem 1) as m oo? Justify your answer with numerical evidence. 3. What about the behavior of the 2-norm of such matrices (in MATLAB, simply use norm)? What happens as m oo? Can you relate this to Problem 1? 4. Same question for the condition number (in MATLAB, simply use condest)? Problem 3 (Inspired by Trefethen and Bau) Consider random mxm matrices whose entires are independent samples of the normal distribution with mean zero and standard deviation m-1/2, i..e, sampled from N(0,1/m). In MATLAB, you can construct such matrices through A = randn(m)/sqrt(m); 1. Illustrate through well chosen plots what the "eigenvalues look like". You should do this for many matrices of the same size together, for instance 1000 such matrices of size 32 or 64. Use the MATLAB eig function to get the eigenvalues (note that these will in general by complex and thus your plots should be in the complex plane). What is the pattern? A few well chosen plots are much better than many poorly chosen ones. Make sure to clearly label all plots. 2. What can you say about the limiting behavior of the spectral radius (see Problem 1) as m oo? Justify your answer with numerical evidence. 3. What about the behavior of the 2-norm of such matrices (in MATLAB, simply use norm)? What happens as m oo? Can you relate this to Problem 1? 4. Same question for the condition number (in MATLAB, simply use condest)

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image_2

Step: 3

blur-text-image_3

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Data Infrastructure For Medical Research In Databases

Authors: Thomas Heinis ,Anastasia Ailamaki

1st Edition

1680833480, 978-1680833485

More Books

Students also viewed these Databases questions