Contour integration of real functions

stefaneli · Jan 28, 2013

I have a problem with choosing a contour for integration... Can someone explain to me when to use a keyhole contour and when a semi-circle? Thanks...:)

joeblow · Jan 28, 2013

stefaneli said:

I have a problem with choosing a contour for integration... Can someone explain to me when to use a keyhole contour and when a semi-circle? Thanks...:)

Use keyhole when you need to avoid singularities.

stefaneli · Jan 28, 2013

Singularities on real axis?

joeblow · Jan 28, 2013

Yes. Like (sin x)/x.

stefaneli · Jan 28, 2013

Thanks man.:)

Contour integration of real functions

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Contour integration of real functions

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