Givens Rotation: Find J(2,3) and Prove Orthogonality

In summary, Givens Rotation is a mathematical technique used in linear algebra to rotate a vector in a multi-dimensional space. It is commonly used to solve systems of linear equations and perform other operations on matrices, such as finding specific coordinates. Its purpose is to provide more efficient and accurate calculations compared to other methods. Givens Rotation can also be used to prove orthogonality by showing that the dot product of two vectors is equal to zero after rotation. Some real-world applications of Givens Rotation include image processing, data compression, robotics, principal component analysis, and quantum computing.
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squenshl
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Homework Statement


A Givens rotation is a matrix J(i,k) that is the identity matrix except jii = jkk = c and jik = -jki = s where c2 + s2 = 1. Let x = [1,-1,3]T. Find the rotation matrix J(2,3) such that the third element of Jx is zero. Show that J(2,3) is orthogonal.

Homework Equations


To prove orthogonality just show JTJ = I


The Attempt at a Solution

 
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What have you tried?

Where are you stuck?
 
  • #3
What does it mean when you have to find J(2,3)? Does it mean a 2 x 3 matrix?
 
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Never mind I think I got it
 

FAQ: Givens Rotation: Find J(2,3) and Prove Orthogonality

What is Givens Rotation?

Givens Rotation is a mathematical technique used in linear algebra to rotate a vector in a multi-dimensional space. It is often used to solve systems of linear equations and to perform other operations on matrices.

How do you find J(2,3) using Givens Rotation?

In order to find J(2,3) using Givens Rotation, you first need to identify the rotation angle and the two coordinates that you want to rotate. Then, you can use the rotation matrix to perform the rotation and find the new coordinates of J(2,3).

What is the purpose of finding J(2,3) using Givens Rotation?

The purpose of finding J(2,3) using Givens Rotation is to solve a system of linear equations or perform other operations on matrices that involve rotating a vector in a multi-dimensional space. It allows for more efficient and accurate calculations compared to other methods.

How do you prove orthogonality using Givens Rotation?

In order to prove orthogonality using Givens Rotation, you need to show that the dot product of two vectors is equal to zero after performing the rotation. If the dot product is equal to zero, it means that the two vectors are perpendicular to each other and therefore, orthogonal.

What are some real-world applications of Givens Rotation?

Givens Rotation has various applications in fields such as engineering, computer science, and physics. It is used in image processing, data compression, robotics, and other areas that involve manipulating multi-dimensional data. It is also used in statistics to perform principal component analysis and in quantum computing to perform quantum gates.

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