because of this work dirichlet is considered the founder of the theory of fourier series. riemann , who was a student of dirichlet, wrote in the introduction to his habilitation thesis on fourier series that it was dirichlet :
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Because of this work Dirichlet is considered the founder of the theory of Fourier series. Riemann , who was a student of Dirichlet, wrote in the introduction to his habilitation thesis on Fourier series that it was Dirichlet :