The text book used in one of my courses talks about expanding functions in powers of 1/z aka negative powers of z.(adsbygoogle = window.adsbygoogle || []).push({});

The problem is that I cannot recall that any previous course taught me/challenged me on how to expand functions in negative powers. For example, Taylor series only have positive powers.

Is there a general method of expanding in negative powers, like for Taylor series, or are there at best similar methods for similar functions?

I fear I have overlooked something elementary here, because I feel strangely clueless about this one (and Internet searches have made me no wiser). The textbook only gives examples of theresultsof expansion in 1/z, but never gives any details on how it is done.

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# Expanding in powers of 1/z (Laurent series)

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