- #1

ChrisVer

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## Main Question or Discussion Point

I read in http://www-library.desy.de/preparch/books/vstatmp_engl.pdf page 29 (43 for pdf) that the mean volume is:

[itex]<V> = \int_{-\infty}^\infty dr V(r) N(r| r_0,s)[/itex]

I have two questions.

Q1: why do they take the radius to be from -infinity to +infinity and not from 0 to infinity?

Q2: is there an intuitive way to see/describe why the mean volume is larger than the one obtained from the mean radius?

Thanks

[itex]<V> = \int_{-\infty}^\infty dr V(r) N(r| r_0,s)[/itex]

I have two questions.

Q1: why do they take the radius to be from -infinity to +infinity and not from 0 to infinity?

Q2: is there an intuitive way to see/describe why the mean volume is larger than the one obtained from the mean radius?

Thanks

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