KnowraFejér's theoremLinked fromLinked fromThe 2 pages that link to Fejér's theorem, each with the reason it gives.All 2Broader topic 1Compared with 1Cesàro summationBroader topic: It established a major application of Cesàro averaging to Fourier analysis.Dirichlet–Jordan testCompared with: Averaging partial sums can ensure convergence under conditions different from bounded variation.