EntityQ1063579· pop 20· linked from 85 articlesDirichlet characterSign in to savecertain arithmetic functionsConnectionsSpringer Science+Business MediaEntityInternational Standard Book NumberEntityprime numberEntityreal numberEntitydigital object identifierEntitygroupEntityΧ/χEntityJohann Peter Gustav Lejeune DirichletEntitybibcodeEntityisomorphismEntityQ118398Entityabelian groupEntitycoprimeEntitycomplex conjugateEntityif and only ifEntitycomplex planeEntityhomomorphismEntityChinese remainder theoremEntitydiscriminantEntityEuler's totient functionEntityCategoriesAnalytic number theoryZeta and L-functions