Solution for Integral Probs: Exponential Form w/ Symmetric Matrix

  • Thread starter Petar Mali
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In summary, the general form of an exponential solution for a symmetric matrix integral problem is <em>e<sup>At</sup></em>, where <em>A</em> is the symmetric matrix and <em>t</em> is the independent variable. The integral of this solution is solved using the matrix exponential function, which involves diagonalizing the matrix and calculating the exponential of each diagonal element. The significance of a symmetric matrix in this solution is that it guarantees a real-valued solution and allows for simplification through diagonalization. This solution can be used for physical systems, but it may have limitations such as assuming time-independence and not being suitable for non-linear dynamics.
  • #1
Petar Mali
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What is idea for showing this?

[tex]\int\int\ldots\int dx_1 dx_2\ldots dx_n e^{-a x^\top A x}=\sqrt{\frac{\pi^n}{\det A}}[/tex]

[tex]A[/tex] is symmetric matrix, and [tex]a[/tex] is constant!
 
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  • #2
(1) when [itex]A[/itex] is replaced by [itex]U^{-1}AU[/itex], where [tex]U[/itex] is an orthogonal matrix, the integral is unchanged.

(2) do the case where [itex]A[/itex] is diagonal

(3) any connection between (1) and (2) ?
 

Related to Solution for Integral Probs: Exponential Form w/ Symmetric Matrix

1. What is the general form of an exponential solution for a symmetric matrix integral problem?

The general form of an exponential solution for a symmetric matrix integral problem is eAt, where A is the symmetric matrix and t is the independent variable.

2. How is the integral of an exponential solution for a symmetric matrix solved?

The integral of an exponential solution for a symmetric matrix is solved using the matrix exponential function. This involves diagonalizing the matrix and calculating the exponential of each diagonal element, then transforming the result back to the original coordinate system.

3. What is the significance of a symmetric matrix in an exponential solution?

A symmetric matrix is significant in an exponential solution because it guarantees that the solution will be real-valued, making it easier to interpret and work with mathematically. It also allows for simplification of the solution by diagonalization.

4. Can an exponential solution for a symmetric matrix be used for physical systems?

Yes, an exponential solution for a symmetric matrix can be used for physical systems. It is commonly used in physics, particularly in the field of quantum mechanics, to describe the time evolution of a system.

5. Are there any limitations to using an exponential solution for a symmetric matrix?

One limitation of using an exponential solution for a symmetric matrix is that it assumes the matrix is time-independent, which may not always be the case in real-world applications. Additionally, it may not be suitable for systems with non-linear dynamics.

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