Is the conjugate of an integral the integral of the conjugate in L2 space?

In summary, the claim that the complex conjugate of an integral is equal to the integral of the complex conjugate is not true in general. However, it holds true in the specific case of the inner product defined for L2 space, where the conjugate of the integral is equal to the integral of the conjugate. This is supported by Morera's Theorem for analytic functions integrated round loops.
  • #1
gonzo
277
0
In the complex conjugate of an integral equal to the integral of the complex conjugate?

If so, is there an easy way to show this?

Thanks.
 
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  • #2
In general, the answer is no. Just consider analytic functions integrated round loops and apply Morera's Theorem (if the integral of a function round all closed paths is zero then the function is analytic).
 
  • #3
Well, what about when you look at the inner product defined for L2 space. Here the claim is made that:

[tex]
<f,g> = \int f\overline{g}
[/tex][tex]
<f,g> = \overline{<g,f>}
[/tex][tex]
\int f\overline{g}=\overline{\int g\overline{f}}
[/tex]

But this is the same as saying in this case that the conjugate of the integral is the integral of the conjugate. How is this supported if this isn't true in general?
 
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FAQ: Is the conjugate of an integral the integral of the conjugate in L2 space?

What is the definition of the Conjugate of an Integral?

The Conjugate of an Integral is a mathematical concept that involves taking the complex conjugate of the integrand in an integral. This is done by changing the sign of the imaginary part of the integrand.

Why is the Conjugate of an Integral important?

The Conjugate of an Integral is important because it allows for complex integrals to be evaluated more easily. It also has applications in various areas of mathematics, such as in the study of Fourier series and complex analysis.

How do you find the Conjugate of an Integral?

The Conjugate of an Integral can be found by simply changing the sign of the imaginary part of the integrand. In other words, if the integrand is f(x) + ig(x), then the conjugate of the integral would be f(x) - ig(x).

What are some properties of the Conjugate of an Integral?

Some properties of the Conjugate of an Integral include: it is distributive, meaning that the conjugate of a sum is equal to the sum of the conjugates; it is also commutative, meaning that the order in which the conjugate is taken does not matter.

How is the Conjugate of an Integral used in complex analysis?

In complex analysis, the Conjugate of an Integral is used to evaluate complex integrals and to prove the Cauchy-Riemann equations. It is also used in the study of analytic functions and contour integrals in the complex plane.

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