Free Course Image Linear Algebra Course

Free online courseLinear Algebra Course

Duration of the online course: 10 hours and 49 minutes

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Explore Linear Algebra with our free course covering systems of equations, matrix operations, vector spaces, determinants, eigenvectors, orthogonal vectors, and more.

In this free course, learn about

  • Solving Linear Systems and Row Reduction
  • Vectors, Linear Combinations, and Matrix Equations
  • Homogeneous and Non-Homogeneous Systems and Applications
  • Linear Independence and Transformations
  • Matrix Operations and Inverses
  • Determinants and Their Properties
  • Vector Spaces, Subspaces, and Bases
  • Eigenvalues, Eigenvectors, and the Characteristic Equation
  • Inner Products, Orthogonality, and Least Squares

Course Description

Welcome to the Linear Algebra Course, a comprehensive foundational course with a duration of 10 hours and 49 minutes. As part of the Basic Studies category and specifically focusing on Algebra, this course provides an in-depth exploration of critical concepts and techniques in Linear Algebra. Whether you are a student seeking a solid grounding in the subject or looking to refresh your knowledge, this course is tailored to meet your needs.

The course starts by delving into Systems of Linear Equations, where you'll learn to solve these systems using Augmented Matrices and Row Operations. This sets the stage for understanding the intricacies of Row Reduction and Echelon Forms. As you progress, you'll become adept at interpreting Solution Sets and identifying Free Variables.

Next, we move on to Vector Equations and Linear Combinations, essential tools for handling more complex algebraic structures. A thorough understanding of the Matrix Equation Ax=b and the Computation of Ax is also covered, ensuring you are well-equipped to tackle both Homogeneous and Non-Homogeneous System Solutions.

The course also highlights practical applications of linear systems, including Economic Sectors and Network Flow, making the abstract concepts tangible and relevant to real-world scenarios. You'll explore Linear Independence and learn Special Ways to Determine Linear Independence, gaining insights into the robustness of vector spaces.

Matrix Transformations and an Introduction to Linear Transformations form another critical part of the course, offering a gateway to more advanced topics. Matrix Operations such as Sums, Scalar Multiples, Multiplication, and Transpose are discussed in detail. Furthermore, you'll grasp the concepts behind the Inverse of a Matrix, its properties, and methods for solving systems using the inverse, including Elementary Matrices and the Algorithm for finding an inverse.

Characterizations of Invertible Matrices prepare you for the next phase, where we delve into Determinants, including Introduction to Determinants, Co-factor Expansion, and key Properties of Determinants. You'll then advance to Vector Spaces, understanding their structure and the concept of Subspaces.

The exploration continues with Null Spaces, Column Spaces, and the importance of Linearly Independent Sets and Bases, supported by the Spanning Set Theorem. You'll also learn to determine the Dimension of a Vector Space and examine Subspaces of Finite Dimensional Space.

Further, topics like Row Space and Rank provide a well-rounded view of vector operations, setting the stage for Eigenvectors and Eigenvalues and their significance. The course also delves deeper into these concepts, linking them with Determinants and the IMT, and unraveling the Characteristic Equation.

The final module covers Inner Product, Vector Length, and Distance, paving the way to understanding Orthogonal Vectors. You'll encounter Orthogonal Sets and Orthogonal Projections, culminating in the Orthogonal Decomposition Theorem and the Best Approximation Theorem. The study concludes with an examination of Least Squares Problems, ensuring you're proficient in one of the fundamental techniques in numerical methods.

Embrace this opportunity to master Linear Algebra and elevate your algebraic skills to new heights. Enroll now and embark on your journey through the fascinating world of vectors, matrices, and transformations.

Course content

  • Video class: Linear Algebra 1.1.1 Systems of Linear Equations 18m
  • Exercise: In linear algebra, when solving a system of linear equations using an augmented matrix, which operation is NOT an acceptable elementary row operation?
  • Video class: Linear Algebra 1.1.2 Solve Systems of Linear Equations in Augmented Matrices Using Row Operations 23m
  • Exercise: Which of the following row operations is correctly applied to transform a given matrix?
  • Video class: Linear Algebra 1.2.1 Row Reduction and Echelon Forms 17m
  • Exercise: What is the key difference between a matrix in echelon form and one in reduced row echelon form?
  • Video class: Linear Algebra 1.2.2 Solution Sets and Free Variables 14m
  • Exercise: Consider a system of linear equations represented by an augmented matrix in row-echelon form. If you find that the last row of the matrix is [0 0 0 | 5], what does this indicate about the system?
  • Video class: Linear Algebra 1.3.1 Vector Equations 12m
  • Exercise: Which of the following statements accurately describes a vector in R2?
  • Video class: Linear Algebra 1.3.2 Linear Combinations 24m
  • Exercise: What is a linear combination of vectors?
  • Video class: Linear Algebra 1.4.1 The Matrix Equation Ax=b 11m
  • Exercise: Given the matrix A with dimensions 1 by n and a vector X with dimensions n by 1, if A * X results in a vector with all entries zero, what can be said about the vector X?
  • Video class: Linear Algebra 1.4.2 Computation of Ax 09m
  • Exercise: What is the result of multiplying matrix A = [[2, 1], [-4, 2]] by vector X = [3, -1] using the row vector rule for computing AX?
  • Video class: Linear Algebra 1.5.1 Homogeneous System Solutions 17m
  • Exercise: What does it mean for a solution to be non-trivial in a homogeneous system of linear equations?
  • Video class: Linear Algebra 1.5.2 Non-Homogeneous System Solutions 11m
  • Exercise: In the context of linear algebra, what does the general solution to a non-homogeneous system of equations in the form Ax = B typically involve?
  • Video class: Linear Algebra 1.6.1 Applications of Linear Systems - Economic Sectors 06m
  • Exercise: In a simplified economy with two sectors, goods and services, suppose goods sell 80% of their output to services, and services sell 70% of their output to goods. Using linear systems to find equilibrium, how would the income be matched to expenditures?
  • Video class: Linear Algebra 1.6.2 Applications of Linear Systems - Network Flow 08m
  • Exercise: In a network flow system, the balance equations for nodes indicate the relationship between incoming and outgoing flows. Given a network where the inflows and outflows are described by the following equations: 1. x1 + x3 = 20 2. x2 - x3 - x4 = 0 3. x1 + x2 = 80 4. x4 = 60 What is the correct expression for the flow pattern for x2 in terms of x3?
  • Video class: Linear Algebra 1.7.1 Linear Independence 11m
  • Exercise: A set of vectors \( \{\mathbf{v_1}, \mathbf{v_2}, \mathbf{v_3}\} \) is given. Which condition will guarantee that the set is linearly independent?
  • Video class: Linear Algebra 1.7.2 Special Ways to Determine Linear Independence 08m
  • Exercise: Which of the following statements is true regarding a set of vectors and linear independence?
  • Video class: Linear Algebra 1.8.1 Matrix Transformations 13m
  • Exercise: In the context of matrix transformations, which of the following statements is true?
  • Video class: Linear Algebra 1.8.2 Introduction to Linear Transformations 09m
  • Exercise: What is the geometric interpretation of a linear transformation represented by the matrix A = [0 -1; 1 0] when applied to vectors in R²?
  • Video class: Linear Algebra 2.1.1 Matrix Operations - Sums and Scalar Multiples 13m
  • Exercise: Which of the following describes a square matrix?
  • Video class: Linear Algebra 2.1.2 Matrix Operations - Multiplication and Transpose 28m
  • Exercise: Given two matrices A and B, with A being a 3x4 matrix and B being a 4x2 matrix, what is the size of the resulting matrix after multiplying A by B?
  • Video class: Linear Algebra 2.2.1 The Inverse of a Matrix 14m
  • Exercise: Which of the following statements is true regarding the inverse of a 2x2 matrix?
  • Video class: Linear Algebra 2.2.2 Solving 2x2 Systems with the Inverse and Inverse Properties 14m
  • Exercise: If A is an invertible matrix, what can be said about the inverse of its transpose?
  • Video class: Linear Algebra 2.2.3 Elementary Matrices And An Algorithm for Finding A Inverse 30m
  • Exercise: What is the defining property of an identity matrix in regard to matrix multiplication?
  • Video class: Linear Algebra 2.3.1 Characterizations of Invertible Matrices 06m
  • Exercise: Which of the following is a characterization of an invertible matrix according to the invertible matrix theorem?
  • Video class: Linear Algebra 3.1.1 Introduction to Determinants 12m
  • Exercise: What is the determinant of the 3x3 matrix A given below using the cofactor expansion method? Matrix A: 2 3 1 0 5 -2 4 1 0
  • Video class: Linear Algebra 3.1.2 Co-factor Expansion 16m
  • Exercise: What does the method of cofactor expansion allow you to do when calculating the determinant of a matrix?
  • Video class: Linear Algebra 3.2.1 Properties of Determinants 25m
  • Exercise: If a 2x2 matrix A has a determinant of 6 and a scalar multiplication by 3 is applied to the matrix, resulting in a new matrix 3A, what will be the determinant of matrix 3A?
  • Video class: Linear Algebra 4.1.1 Vector Spaces 18m
  • Exercise: Consider a set of vectors in a space with defined operations of addition and scalar multiplication. Which of the following conditions does NOT need to be verified to determine if the space is a vector space?
  • Video class: Linear Algebra 4.1.2 Subspace of a Vector Space 17m
  • Exercise: Which of the following statements must be true for a subset H of a vector space V to be considered a subspace of V?
  • Video class: Linear Algebra 4.2.1 Null Spaces 16m
  • Exercise: What is the null space of an M by N matrix A?
  • Video class: Linear Algebra 4.2.2 Column Spaces 19m
  • Exercise: Which statement is true regarding the column space of a matrix A?
  • Video class: Linear Algebra 4.3.1 Linearly Independent Sets and Bases 15m
  • Exercise: Which of the following is true about a linearly independent set of vectors in a vector space?
  • Video class: Linear Algebra 4.3.2 The Spanning Set Theorem 18m
  • Exercise: Which of the following statements about the spanning set theorem is true?
  • Video class: Linear Algebra 4.5.1 The Dimension of a Vector Space 09m
  • Exercise: Consider a vector space V that is spanned by the vectors [2, 3, 1], [4, 6, 2], and [1, -1, 0]. Determine the dimension of the vector space V.
  • Video class: Linear Algebra 4.5.2 Subspaces of a Finite Dimensional Space 09m
  • Exercise: Given a finite-dimensional vector space V with a subspace H, which of the following statements is true according to the theorem about subspaces?
  • Video class: Linear Algebra 4.6.1 The Row Space 12m
  • Exercise: Which of the following statements correctly describes the row space of a matrix A?
  • Video class: Linear Algebra 4.6.2 Rank 05m
  • Exercise: Consider a 6 by 8 matrix A. If the null space of A has a dimension of 2, what is the rank of A?
  • Video class: Linear Algebra 5.1.1 Eigenvectors and Eigenvalues 19m
  • Exercise: If a square matrix A has eigenvalue λ = 4, and a corresponding eigenvector is X = [2, -1], which of the following is true for matrix A when multiplied by X?
  • Video class: Linear Algebra 5.1.2 More About Eigenvectors and Eigenvalues 09m
  • Exercise: What does the theorem state about eigenvectors corresponding to distinct eigenvalues?
  • Video class: Linear Algebra 5.2.1 Determinants and the IMT 09m
  • Exercise: Given a 2x2 matrix A, if the eigenvalues of A are 3 and 5, what would be the determinant of A?
  • Video class: Linear Algebra 5.2.2 The Characteristic Equation 08m
  • Exercise: Given a 4x4 matrix A, the determinant of (A - λI) is expanded into the characteristic polynomial λ^4 - 10λ^3 + 35λ^2 - 50λ + 24. What are the eigenvalues of the matrix A?
  • Video class: Linear Algebra 6.1.1 Inner Product, Vector Length and Distance 12m
  • Exercise: If the vector U is (5, -2, 3) and the vector V is (1, 4, 0), what is the dot product of U and V?
  • Video class: Linear Algebra 6.1.2 Orthogonal Vectors 07m
  • Exercise: Which calculation demonstrates that two vectors are orthogonal?
  • Video class: Linear Algebra 6.2.1 Orthogonal Sets 13m
  • Exercise: What determines if a set of vectors is orthogonal?
  • Video class: Linear Algebra 6.2.2 Orthogonal Projections 08m
  • Exercise: What does the orthogonal projection of a vector Y onto a vector U represent in geometric terms?
  • Video class: Linear Algebra 6.3.1 Orthogonal Decomposition Theorem 07m
  • Exercise: According to the orthogonal decomposition theorem, how can any vector Y be expressed in terms of vectors from a subspace W and its orthogonal complement W perp?
  • Video class: Linear Algebra 6.3.2 The Best Approximation Theorem 11m
  • Exercise: What does the Best Approximation Theorem state about the relationship between a vector Y in R^n and its projection Y hat onto a subspace W?
  • Video class: Linear Algebra 6.5.1 Least Squares Problems 18m
  • Exercise: In the context of the least squares method in linear algebra, if matrix A is inconsistent with vector B for the equation Ax = B, what does the vector B-hat represent?

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