Identifying Redundant Vectors from a 1x4 Matrix

In summary, the conversation discusses determining if four given vectors can be removed without changing the span and how to tell if the vectors form a basis for a four-dimensional vector space. The key criteria for a basis are that the vectors span the space and are independent, and any two of these criteria are sufficient to prove the third.
  • #1
Derill03
63
0
im given four vectors as a 1x4 matrices:

[1,4,2,8]^t = v1
[2,5,3,9]^t = v2
[11,14,12,18]^t = v3
[4,3,2,1]^t = v4

How can i know which if any of these vectors can be removed without changing the span?
 
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  • #2
Check if they're linearly independent. If they are, then you cannot remove any of them without changing the span.
 
  • #3
How can i tell if the vectors are a basis for R^4?
 
  • #4
A basis for an n dimensional vector space has three properties
1) the vectors span the space
2) the vectors are independent
3) the set contains n vectors

and, any two of those is sufficient to prove the third.

You know you have four vectors here. If they are independent, then they must also span the space and are a basis. If they are not independent, they do not form a basis.
 

1. What is a 1x4 matrix?

A 1x4 matrix is a matrix with one row and four columns. It is a rectangular array of numbers or variables enclosed in brackets.

2. What are redundant vectors?

Redundant vectors are vectors that can be expressed as a linear combination of other vectors in a given set. They do not add any new information to the set and can be removed without changing the overall properties of the set.

3. How do you identify redundant vectors in a 1x4 matrix?

To identify redundant vectors in a 1x4 matrix, you can use the Row Reduction Method. This involves performing elementary row operations on the matrix to transform it into Reduced Row Echelon Form (RREF). Redundant vectors will have a leading 1 in the same columns as other vectors, indicating that they can be expressed as a linear combination of the other vectors.

4. Why is it important to identify redundant vectors?

Identifying redundant vectors is important because it can simplify a set of data or equations. It also helps to reduce computational complexity and can lead to a more efficient and accurate solution to a problem.

5. Can a 1x4 matrix have more than one redundant vector?

Yes, a 1x4 matrix can have more than one redundant vector. In fact, it is possible for all four vectors in a 1x4 matrix to be redundant, meaning they can all be expressed as a linear combination of the other three vectors in the set.

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