On Tauber's second Tauberian theorem

Ricardo Estrada, Jasson Vindas
2012 Tohoku mathematical journal  
We study Tauberian conditions for the existence of Cesàro limits in terms of the Laplace transform. We also analyze Tauberian theorems for the existence of distributional point values in terms of analytic representations. The development of these theorems is parallel to Tauber's second theorem on the converse of Abel's theorem. For Schwartz distributions, we obtain extensions of many classical Tauberians for Cesàro and Abel summability of functions and measures. We give general Tauberian
more » ... ons in order to guarantee (C, β) summability for a given order β. The results are directly applicable to series and Stieltjes integrals, and we therefore recover the classical cases and provide new Tauberians for the converse of Abel's theorem where the conclusion is Cesàro summability rather than convergence. We also apply our results to give new quick proofs of some theorems of Hardy-Littlewood and Szász for Dirichlet series. ∞ n=0 c n = γ (A) . 2010 Mathematics Subject Classification. Primary 40E05, 40G05, 40G10, 46F20. Secondary 46F10. Key words and phrases. Tauberian theorems, the converse of Abel's theorem, Hardy-Littlewood Tauberians, Szász Tauberians, distributional point values, boundary behavior of analytic functions, asymptotic behavior of generalized functions, Laplace transform, Cesàro summability. R.
doi:10.2748/tmj/1356038977 fatcat:iqryc3fhtbf6feesmo7x4bcg54