How Do You Simplify This Vector Expression?

  • Thread starter izchief360
  • Start date
  • Tags
    Vector
In summary, the conversation revolved around simplifying the expression (4u + 3v) ⋅ (4u − 2v) − ll 3u − 4v ll2. It was determined that the dot product is equivalent to the inner product in the case of real spaces and follows the same order of operations as multiplication by a scalar. The process of solving the expression involved taking the inside terms of the first term and dotting them with the entire second term, and then combining like terms.
  • #1
izchief360
7
0
I'm trying to simplify the following expression:

(4u + 3v) ⋅ (4u − 2v) − ll 3u − 4v ll2

And I'm unsure how to proceed.
 
Physics news on Phys.org
  • #2
Assuming the dot represents the inner product, what formulas do you know that give the properties of the inner product?
 
  • #3
Is the inner product equivalent to the dot product? The only relevant formula I know is the that of the dot product, but I am unsure of how to apply order of operations when dealing with vectors.
 
  • #4
Yes, the inner product is the dot product (in the case of real spaces). Dot product is a multiplication, so it has a higher order then addition/subtraction, and the same order as multiplication by a scalar.
 
  • #6
Thanks folks, I solved it. The process included taking the inside terms of the entire first term and dotting them with the entire second term as follows:
(4u + 3v) ⋅ (4u − 2v)
[4u ⋅ (4u − 2v)] + [3v ⋅ (4u − 2v)]
16u2 - 8u⋅v + 12u⋅v - 6v2

and for the second part, ll 3u − 4v ll2 is equivalent to (3u - 4v)⋅(3u - 4v), and it's the same process as above. Then, just combine like terms.
 

FAQ: How Do You Simplify This Vector Expression?

What is vector simplification?

Vector simplification is the process of reducing a complex vector into a simpler form while retaining its essential features and characteristics. It involves removing unnecessary details or components from a vector to make it easier to understand and work with.

Why is vector simplification important?

Vector simplification is important because complex vectors can be difficult to interpret and use. By simplifying a vector, it becomes easier to visualize and analyze, making it more useful for scientific and engineering applications.

What are some common techniques used for vector simplification?

Some common techniques for vector simplification include dimensionality reduction, feature selection, and feature extraction. These techniques involve reducing the number of variables or features in a vector while preserving most of the information.

What are the benefits of vector simplification?

The benefits of vector simplification include improved interpretability, reduced computational complexity, and increased efficiency in data analysis and modeling. Simplified vectors are also easier to communicate and understand, making them more useful for decision-making.

What are some potential challenges of vector simplification?

One potential challenge of vector simplification is the loss of important information that may be useful for certain applications. Another challenge is finding the right balance between simplifying a vector and preserving its essential features. It may also be difficult to determine which simplification technique is most appropriate for a given vector.

Similar threads

Back
Top