EntityQ3229331· pop 6· linked from 4 articlesestimation lemmaSign in to saveConcept in integral mathematicsConnectionscontour integrationEntityInternational Standard Book NumberEntitycircleEntitycomplex numberEntityradiusEntityintegralEntityabsolute valueEntitycurveEntitycontinuous functionEntitycomplex analysisEntitymaxima and minimaEntitylemmaEntitytriangle inequality theoremEntitycircumferenceEntityarc lengthEntityupper and lower boundsEntityJordan's lemmaEntityCategoriesLemmas in mathematical analysisTheorems in complex analysis