Necessary and Sufficient Conditions under Which Convergence Follows from Summability by Weighted Means

نویسندگان

  • FERENC MÓRICZ
  • ULRICH STADTMÜLLER
چکیده

We prove necessary and sufficient Tauberian conditions for sequences summable by weighted mean methods. The main results of this paper apply to all weighted meanmethods and unify the results known in the literature for particularmethods. Among others, the conditions in our theorems are easy consequences of the slowly decreasing condition for real numbers, or slowly oscillating condition for complex numbers. Therefore, practically all classical (one-sided as well as two-sided) Tauberian conditions for weighted mean methods are corollaries of our two main theorems. 2000 Mathematics Subject Classification. 40E05, 40C05.

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تاریخ انتشار 2001