Author of a 1918 study of products of absolutely convergent and Cesàro-summable series. The paper places multiplication results within the developing theory of Cesàro summation. Initials are retained as printed on the inspected source, without expanding an unverified identity.[ref]
Sur la multiplication de séries absolument convergentes par des séries sommables par la méthode de Cesàro by A. F. Andersen. author attribution and the named work’s subject
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