Browsing Mathematics by Subject "41A99, 43A15, 43A50, 43A85, 46E30"

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    • Approximations in $L^1$ with convergent Fourier series 

      Avetisyan, Z; Grigoryan, M; Ruzhansky, M (Springer (part of Springer Nature), 2020)
      For a separable finite diffuse measure space $\mathcal{M}$ and an orthonormal basis $\{\varphi_n\}$ of $L^2(\mathcal{M})$ consisting of bounded functions $\varphi_n\in L^\infty(\mathcal{M})$, we find a measurable subset ...