Find the equivalance of AB and BC

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In summary, the right multiplication of a (n x 3) matrix B by a (3 x 3) matrix C, whose columns correspond to eigenvectors of X'LX, can be expressed as the left multiplication of the form AB, where A is a (n x n) matrix. However, the system may not have a proper basis, which requires n linearly independent vectors in the basis matrix. To write this equation, you can simply state AB = BC, and if more detail is needed, expand the system using summations for each element on the left and right-hand side.
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onako
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Suppose a (n x 3) matrix B is given, n>3. Also, suppose a matrix (3 x 3) matrix C is given, whose columns correspond to eigenvectors of X'LX, for some symmetric, real L. How could I state the right multiplication of B, ie., BC, is equivalent to left multiplication of the form AB, for some (n x n) matrix A?
 
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onako said:
Suppose a (n x 3) matrix B is given, n>3. Also, suppose a matrix (3 x 3) matrix C is given, whose columns correspond to eigenvectors of X'LX, for some symmetric, real L. How could I state the right multiplication of B, ie., BC, is equivalent to left multiplication of the form AB, for some (n x n) matrix A?

Hey onako.

Have you tried expanding out the form of the matrix using your A,B, and C matrices?

Although the matrices have the same size left and right (AB = BC), the system does not have a proper basis which means that you can't use these kinds of methods (as far as I know) (unless n = 3). A basis requires n linearly independent vectors in your basis matrix.

If you just want to know how to write the above without any specific details you can write AB = BC. If you want to add more detail you're probably going to have to expand out the system in terms of summations for each element on the LHS and RHS and then do what you have to do.
 

1. What does it mean to "find the equivalence of AB and BC"?

When we talk about finding the equivalence of AB and BC, we are referring to determining whether these two mathematical expressions or measurements are equal to each other. This can be done through various methods depending on the context, such as using mathematical equations or physical measurements.

2. Is finding the equivalence of AB and BC important in science?

Yes, finding the equivalence of AB and BC is crucial in science as it allows us to make accurate comparisons and draw meaningful conclusions from our experiments and observations. It also helps us verify the validity of our theories and models.

3. How do you find the equivalence of AB and BC using mathematical equations?

To find the equivalence of AB and BC using mathematical equations, you can set the two expressions equal to each other and solve for the unknown variables. This will tell you if the expressions are equal or not. Another method is to use algebraic manipulations to simplify the expressions and see if they are identical.

4. Are there any tools or techniques that can help find the equivalence of AB and BC?

Yes, there are various tools and techniques that can aid in finding the equivalence of AB and BC. These include using graphing calculators, software programs, and statistical analysis methods. Additionally, techniques such as dimensional analysis can be used to compare physical measurements and determine their equivalence.

5. Can finding the equivalence of AB and BC be used in real-world applications?

Absolutely, finding the equivalence of AB and BC has many real-world applications in different fields of science. For example, in chemistry, it is used to balance chemical equations and determine the amount of reactants needed for a reaction. In physics, it is used to calculate the forces acting on an object and its resulting motion. In biology, it is used to compare genetic sequences and determine evolutionary relationships. These are just a few examples of how finding the equivalence of AB and BC is used in real-world applications.

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