Fourier分析导论——第3章——Fourier级数的收敛性(E.M. Stein & R. Shakarchi)
第3章Fourier级数的收敛性(ConvergenceofFourierSeries)Thesineandcosineseries,bywhichonecanrepresentanarbitraryfunctioninagiveninterval,enjoyamongotherremarkablepropertiesthatofbeingconvergent.Thispropertydidnot