PeterBurbery/ LinearAlgebraPaclet

A paclet for linear algebra and its applications

Contributed by: Peter Burbery

This paclet contains helpful functions for doing computations in linear algebra.

Installation Instructions

To install this paclet in your Wolfram Language environment, evaluate this code:
PacletInstall["PeterBurbery/LinearAlgebraPaclet"]

To load the code after installation, evaluate this code:
Needs["PeterBurbery`LinearAlgebraPaclet`"]

Details

I used the textbooks Linear Algebra and Its Applications by David C. Lay, Steven R. Lay, and Judi J. McDonald 6th Edition by Pearson to help build this paclet.

Paclet Guide

Examples

Basic Examples (7)

Determine if an augmented matrix represents a consistent linear system of equations:

In[1]:=

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Out[1]=

The reduced row echelon form contains a contradiction that 0x₁+0x₂+0x₃=1 so the matrix is not consistent:

In[2]:=

RowReduce[({
{1, 7, 3, -4},
{0, 1, -1, 3},
{0, 0, 0, 1},
{0, 0, 1, -2}
})] // MatrixForm

Out[2]=

The solution set is empty. No solutions exist:

In[3]:=

LinearSolve[Map[Most][({
{1, 7, 3, -4},
{0, 1, -1, 3},
{0, 0, 0, 1},
{0, 0, 1, -2}
})](*the coefficient matrix*), Map[Last][({
{1, 7, 3, -4},
{0, 1, -1, 3},
{0, 0, 0, 1},
{0, 0, 1, -2}
})](*the right most column*)]

Out[3]=

In[4]:=

In[5]:=

Out[5]=

The augmented matrix of a linear system is given below. Determine if the system is consistent:

In[6]:=

Out[6]=

Do the calculation for the cofactors of a matrix:

In[7]:=

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Out[4]=

Obtain the diagonalized form of a Cauchy matrix:

In[8]:=

Out[8]=

In[9]:=

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Out[9]=

Some matrices aren't diagonalizable:

In[10]:=

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