EntityQ753375· pop 26· linked from 86 articlesresidueSign in to savecoefficient of the term of order −1 in the Laurent expansion of a function holomorphic outside a point, whose value can be extracted by a contour integralConnectionspoleEntitycontour integrationEntitycurveEntityRiemann surfaceEntitymeromorphic functionEntityformal power seriesEntitymathematicsEntityCarl Friedrich GaussEntityLeonhard EulerEntityInternational Standard Book NumberEntitycomplex numberEntitymathematical analysisEntityreal numberEntityBernhard RiemannEntityKarl WeierstraßEntityAugustin-Louis CauchyEntityTaylor seriesEntitycomplex analysisEntityEuler's formulaEntityimaginary numberEntityCategoriesComplex analysisMeromorphic functions