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HomeHomework HelpmathematicsLinear Algebra Basics

Linear Algebra Basics

Linear algebra studies vector spaces and linear mappings between these spaces, focusing on systems of linear equations, their solutions, and properties of matrices.

intermediate
5 hours
Mathematics
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Overview

Linear algebra is a vital area of mathematics that focuses on the study of vectors, matrices, and linear transformations. It provides tools for solving systems of linear equations, which are essential in various fields such as engineering, physics, and economics. Understanding the concepts of vector...

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Key Terms

Vector
A quantity defined by both a magnitude and a direction.

Example: Velocity is a vector because it has both speed and direction.

Matrix
A rectangular array of numbers arranged in rows and columns.

Example: A 2x2 matrix might look like [[1, 2], [3, 4]].

Determinant
A scalar value that can be computed from the elements of a square matrix.

Example: The determinant of a 2x2 matrix [[a, b], [c, d]] is ad - bc.

Eigenvalue
A scalar that indicates how much a corresponding eigenvector is stretched or compressed during a linear transformation.

Example: In the equation Ax = λx, λ is the eigenvalue.

Linear Transformation
A mapping between two vector spaces that preserves the operations of vector addition and scalar multiplication.

Example: Rotating a vector in space is a linear transformation.

Row Reduction
A method used to simplify matrices to solve systems of equations.

Example: Using row reduction, you can convert a matrix to its row echelon form.

Related Topics

Vector Spaces
Study of collections of vectors that can be added together and multiplied by scalars.
intermediate
Linear Programming
Optimization technique for maximizing or minimizing a linear function subject to constraints.
advanced
Matrix Factorization
Decomposing a matrix into a product of matrices to simplify computations.
advanced

Key Concepts

VectorsMatricesDeterminantsEigenvalues