Inverse Gaussian (Wald) distribuiton

Hi all,
I am having trouble to prove that the inverse Gaussian is a valid pdf.
Thanks for your help.

Hello,

What have you tried ? Have you found the pdf of the inverse Gaussian ?

Quote:

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Originally Posted by Moo

Hello,

What have you tried ? Have you found the pdf of the inverse Gaussian ?

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I tried the pdf; but it didn't get me anywhere! I couldn't show that the integral was equal to 1.

Thanks!

Then please show what you got. And detail your calculation steps as much as possible. It's easier to spot a mistake than explaining the whole thing. Especially when a few methods are possible.