Journal of Classical Analysis · Volume 19, Issue 2 Necessary and sufficient conditions for the convergence of positive series 19-09 Pages 117-125 DOI 10.7153/jca-2022-19-09 Downloads Short PDF Full PDF PNG Authors Vyacheslav M. Abramov Keywords positive series convergence or divergence of series series expansion measure theory birth-and-death process Subject classes 40A05 41A58 28A99 60J80