Is a Matrix Zero if Its Inner Product with All Vector Combinations Equals Zero?

In summary, a standard inner product is a mathematical operation that takes two vectors and returns a scalar value, defined as the sum of the products of the corresponding elements of the two vectors. It differs from a regular inner product by having specific properties such as being bilinear, symmetric, and positive definite. It is used in various fields of science, including mathematics, physics, engineering, and computer science. The calculation of a standard inner product involves multiplying the corresponding elements of the two vectors and then summing the products.
  • #1
bernoli123
11
0
if A [tex]\in[/tex] C nxn,show that (x,Ay)=0 for all x,y [tex]\in[/tex] C[n],
then A=0

(x,Ay) denote standard inner product on C[n]
 
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  • #2
bernoli123 said:
if A [tex]\in[/tex] C nxn,show that (x,Ay)=0 for all x,y [tex]\in[/tex] C[n],
then A=0

(x,Ay) denote standard inner product on C[n]

Have you tried using properties of norms, and axioms of the inner product (There is an axiom that deals with zero results)?
 
  • #3
In particular, (e_i, Ae_i)= 0 for every member, [itex]e_i[/itex], of an orthonormal basis.
 
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Related to Is a Matrix Zero if Its Inner Product with All Vector Combinations Equals Zero?

1. What is the definition of a standard inner product?

A standard inner product is a mathematical operation that takes two vectors and returns a scalar value. It is defined as the sum of the products of the corresponding elements of the two vectors.

2. How is a standard inner product different from a regular inner product?

A standard inner product is a specific type of inner product that has certain properties, such as being bilinear and symmetric. Regular inner products may not have these specific properties and can vary depending on the context in which they are used.

3. What are the properties of a standard inner product?

Some common properties of a standard inner product include being bilinear (meaning it distributes over addition and scalar multiplication), symmetric (meaning the order of the vectors does not matter), and positive definite (meaning the result is always positive unless the vectors are both zero).

4. In what fields of science is the concept of a standard inner product used?

The concept of a standard inner product is used in a variety of fields, including mathematics, physics, engineering, and computer science. It is particularly useful in areas that involve vector spaces, such as linear algebra, functional analysis, and signal processing.

5. How is a standard inner product calculated?

The calculation of a standard inner product involves multiplying the corresponding elements of the two vectors and then summing the products. For example, the standard inner product of two vectors, a and b, in a three-dimensional space would be calculated as a1b1 + a2b2 + a3b3.

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