EntityQ899731· pop 30· linked from 245 articlespoleSign in to saveisolated singularity of a holomorphic function 𝑓 such that 1/𝑓 has a zero and is holomorphic at the singularityConnectionscomplex analysisEntityholomorphic functionEntityrational functionEntitycomplex manifoldEntityCarl Friedrich GaussEntityLeonhard EulerEntityInternational Standard Book NumberEntitycomplex numberEntitymathematical analysisEntityreal numberEntityBernhard RiemannEntitypolynomialEntityKarl WeierstraßEntityAugustin-Louis CauchyEntityTaylor seriesEntityimaginary numberEntitydiskEntitygamma functionEntityEuler's formulaEntityisomorphismEntityCategoriesComplex analysis