Matrix Cubing: Understanding the Correct Order for Multiplication

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In summary, cubing a matrix involves raising each element to the power of three, resulting in a new matrix with the same dimensions. This is different from matrix multiplication, which involves multiplying corresponding elements and summing the products. Cubing can be useful in mathematical and statistical calculations, but it can only be applied to square matrices. To cube a matrix using programming, you can use built-in functions or write your own function using basic arithmetic operations.
  • #1
John777
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To cube the matrix [A] I assume you square it and then multiply the result by [A] however in matrix multiplication order matters:

so which is correct?

[A]^3 = [A]^2[A] or [A][A]^2
 
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  • #2
They are the same.

In the end you are just doing [A][A][A]
 
  • #3
It doesn't matter. (A*A)*A=A*(A*A). Matrix multiplication may not be commutative, but it is associative.
 

1. What does it mean to "cube" a matrix?

Cubing a matrix refers to raising each element of the matrix to the power of three, resulting in a new matrix with the same dimensions as the original but with each element cubed.

2. How is matrix cubing different from matrix multiplication?

Matrix cubing involves raising each element to the power of three, while matrix multiplication involves multiplying corresponding elements in each matrix and summing the products. Additionally, matrix cubing only applies to square matrices, while matrix multiplication can be done with matrices of different dimensions.

3. Why is cubing a matrix useful?

Cubing a matrix can be useful in certain mathematical and statistical calculations, particularly in solving systems of equations and in data analysis. It can also help to simplify and reduce the complexity of certain mathematical expressions.

4. Can any matrix be cubed?

No, only square matrices can be cubed. A square matrix has the same number of rows and columns, while a non-square matrix has a different number of rows and columns.

5. How can I cube a matrix using programming?

Most programming languages have built-in functions or libraries for matrix operations, including cubing. You can also write your own function or loop through the matrix elements and raise them to the power of three using basic arithmetic operations.

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