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Laurent series
Power series with negative powers / From Wikipedia, the free encyclopedia
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This article is about doubly infinite power series. For power series with finitely many negative exponents, see Formal Laurent series.
In mathematics, the Laurent series of a complex function is a representation of that function as a power series which includes terms of negative degree. It may be used to express complex functions in cases where a Taylor series expansion cannot be applied. The Laurent series was named after and first published by Pierre Alphonse Laurent in 1843. Karl Weierstrass may have discovered it first in a paper written in 1841, but it was not published until after his death.[1]
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