Pdf for distance between two uniform random points in a circle

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This is my first post in the group and I would be very thankful for any help. I am trying to develop a probability distribution for a performance analysis in my thesis. I am trying to look in to literature which provides the probability distribution for distance between two random points in a unit circle.

I would try to explain the problem. Suppose we have a point X and we have point x1 in the unit circle C1 which contains X. There is another unit circle X2 right next to the circle X1. There is a point x2 in the unit circle X2. Let d1 be the distance between X and x1 and d2 be the distance between X and x2. All the points are distributed within respective circles with random distribution. I want to know the probability distribution for d1/d2. Has anyone worked with a similar problem or anybody can direct me towards any literature.

Thank you so much for the help. Cheers, Waqas

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Where is your problem? Google is your friend!

If you google the words:

distance random points in circles

the first hit gives you the book: An introduction to geometrical probability by A.M. Mathai.

To find in Google:

http://books.google.de/books/about/An_Introduction_to_Geometrical_Probabili.html?id=FV6XncZgfcwC&redir_esc=y

If you look into the book in Google preview, on page 217 you find a chapter treating your problem.

Maybe you can read it yourself ;-)!

Ciao

Karl