Explore BrainMass

Explore BrainMass


    Matrix theory and analysis homework

    Please see the attached document regarding homework specifics. Thank-you so much for your help. For each eigenvalue find the corresponding eigenspace and a set of vectors which span the eigenspace.

    Matrix inverse solution

    Please see attached file Solve all these problems using matrix inverses. You have seen these problems before and have used other means to solve them, please disregard those solutions and solve these using only matrix inverses.

    Matrices and scalars for inverse covariance

    I am unclear as to how some scalars have been calculated. I know what the two vectors and the inverse covariance variance matrix are but please could you clarify the operations required to compute into a single number? There is also a set of data on page two that needs computing along with a general explanation of how to do it.

    Inverse Matrices used to solve linear systems

    Problem1.How are the inverse Matrices used to solve linear systems. Explain in your own words with example. Problem 2. In the matrix Algebra why does there have to be right and left distributive properties.

    Matlab and numerical analysis

    The problems I need solved are attached. Please provide as much detail as possible and include comments for the code done in MATLAB, so I can understand. Thanks Assume that a computer can perform 10^6 multiplications per second. Estimate the time that it would take to evaluate the determinant of a 100x100 matrix...

    Linear Equations and Matrices

    Gretchen Schmidt plans to buy shares of two stocks. One costs $32 per share and pays dividends of $1.20 per share. The other costs $23 per share and pays dividends of $1.40 per share. She has $10,100 to spend and wants to earn dividends of $540. How many share of each stock should she buy? Use the form of " AX=B " equation

    Matrix with no solution

    I need an example of a matrix that has no solution. I also need to know how to use row operations to show why the problem has no solution.

    Matrices and their Applications

    Please help me by showing how these problems on matrices are worked out. (See the Attached Questions File) Answer all questions and show work 1. Find: 2. Find the inverse of: 3. Compute the transpose of A = 4. Introduce slack variables and set up the initial tableau. Do not solve. M

    Using Matrices to Solve Problems

    See attached for proper formatting of these questions: 1. Five neighborhoods (NB) all want to raise money for a playground for their kids. The neighborhood that raises the most money will be able to choose the name of the park. To raise money, they all decide to have a bake sale and sell cookies (C), cakes (K), and muffins

    Working with Rotational Matrices

    R is a 3x3 matrix. What property is required of R for it to be an orthogonal matrix. and (I:-) a rotation matrix? Write down the matrix that effects a rotation by angle theta about the y-axis. See attachment for the rest of the questions.

    Gaussian Elimination with Scaled Partial Pivoting

    Please see attached problem (both Word and pdf version attached). Solve the system 3x1 13x2 | 9x3 | 3x4 = 19 6x1 | 4x2 | x3 18x4 = 34 6x1 - 2x2 + 2x3 + 4x4 - 16 12x1 - 8x2 + 6x3 + 10x4 - 26 by hand using scaled partial pivoting. You may only do the operations on rows that are permitted in Algorithm 6.3 You should nev

    Proof about determinants

    From Determinants. (From Determinants. Prove the proposition without using Cofactors/Cramer's rule.) See Attached

    Linear Algebra - Cofactors and Cramer's Rule

    Please see the attached file. Please kindly show each step of your solution. Thank you. Show that if the entries of a matrix A are integers, then det A is an integer. (Hint: use induction)

    Solve the system using Gaussian elimination.

    Please see the attached file. Solve the system using Gaussian elimination. 2x + y = 1 -2x + 3y = -13 Find the indicated matrix. Let A = [■(1&3@2&4)] and B = [■(0&4@-1&6)] Find 2A + B. For the given matrix A, find -A. A = [■(3&-7@ -6&7)]


    In your own words can you explain to me how inverses are used to solve linear systems?

    Construct the transition matrix.

    4. A city is served by three cable TV companies: Xcellent Cable, Your Cable, and Zephyr Cable. A survey of 1000 cable subscribers shows this breakdown of customers from the beginning to the end of August. Company on Company on August 31 August 1 Xcellent Your Zephyr Xcellent 300 50 50

    Hilbert Matrices

    Please see the attached file. Solve the system of equations. Use Gaussian elimination. Find the Doolittle LU decomposition of H5 with scaled partial pivoting.

    Optimal Assignment Problem for an Array

    How do you solve the optimal assignment problem for the following array by solving two dual problems? Also, how many optimal solutions are there for the array and why? J1 | J2 | J3 | J4 | J5 P1| 2 | 3 | 4 | 3 | 5 P2| 1 | 3 | 2 | 1 | 3 P3| 3 | 5 | 2 | 3 | 3 P4| 4 | 4 | 2 | 1 | 4 P5| 3 | 1 | 4 | 4 |

    Augmented Matrix and a Real World Problem

    From the following augmented matrix (see attachment), first write the system of equations that represents the augmented matrix and then create a real-world word problem that would represent these equations and their unknowns.

    Orthogonal basis to find matrix

    I think matrix A is created by the given vectors (1,0,1) and (0,1,-2) in this case. The material is from Orthogonal Bases. Please explain each step of your solution. Construct the matrix proj(v)....

    Showing a matrix is totally unimodular.

    This problem was a sample exam question taken from a text book. This problem is about showing a matrix is TU. This problem can be found in the Wolsey text book called "Integer Programming". A useful resource is "Integer and Combinatorial optimization" by Wolsey and Nemhauser.

    I need a matrix that has no solution

    I need a matrix with no solution, use row operations to matrix that has no solution. Use row operations to show why it has no unique solution. Also some matrices that have more then one solution (in fact, an infinite number of solutions) because the system is undetermined. (In other words, there are not enough constraints