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Residue at infinity information


In complex analysis, a branch of mathematics, the residue at infinity is a residue of a holomorphic function on an annulus having an infinite external radius. The infinity is a point added to the local space in order to render it compact (in this case it is a one-point compactification). This space denoted is isomorphic to the Riemann sphere.[1] One can use the residue at infinity to calculate some integrals.

  1. ^ Michèle Audin, Analyse Complexe, lecture notes of the University of Strasbourg available on the web, pp. 70–72

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Residue at infinity

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mathematics, the residue at infinity is a residue of a holomorphic function on an annulus having an infinite external radius. The infinity ∞ {\displaystyle...

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point at infinity – and identifying it with the north pole on the sphere. This topological space, the complex plane plus the point at infinity, is known...

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necessary to deal simultaneously with singularities both at a finite number b and at infinity. This is usually done by a limit of the form lim η → 0 +...

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projection. We can turn Γ into a totally ordered group by declaring the residue classes of elements of D as "positive". Even further, given any totally...

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