EINIGE VERALLGEMEINERTE MATRIXVERFAHREN

Abstract

the summability of sequences in abstract spaces X by the summability methods defined by matrices of bounded linear operators are used. The operator-form generalizations of classical Euler—Knopp and Riesz summability methods are introduced. The conditions under which these methods will be of @& — (-type (where a and B are any of the sequence spaces myx, cx or [x) are also given.