Eigenfunction Estimates: Quantitative bounds and asymptotic behaviours that describe the magnitude and concentration phenomena of eigenfunctions of differential operators.

Abdumalik Rakhimov, Erkin Saydamatov, Shuhrat Sheraliev, On the Riesz Summability of the Eigenfunction Expansions on a Closed Domain, Filomat, Vol. 33, No. 16 (2019), pp. 5199-5205 ...

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