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Math Help - Laurent series

  1. #1
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    Laurent series

    \frac{-1}{\sqrt{x+1}} how is it possible calculate the residue bout x=-1 and do the laurent series about of x=-1 thanks,
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  2. #2
    MHF Contributor chisigma's Avatar
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    Re: Laurent series

    Quote Originally Posted by capea View Post
    \frac{-1}{\sqrt{x+1}} how is it possible calculate the residue bout x=-1 and do the laurent series about of x=-1 thanks,
    Unfortunately the function f(z)=- \frac{1}{\sqrt{1+z}} has in z=-1 a brantch point, so that the Laurent series around z=-1 doesn't exist...

    Kind regards

    \chi \sigma
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