Katkova, O.Vishnyakova, A.2013-05-212013-05-212000Vestnik of Kharkov Univ., ser. Matem., 49 (2000), No 475, 70-75.https://ekhnuir.karazin.ua/handle/123456789/8534A new necessary condition for a set to be the zero set of an absolutely monotonic function is given.enentire characteristic functionsentire absolutely monotonic functionsArticle