On an Extension of Cesaro's Methods of Summability to Logarithmic Scales Izaak Wirszup Indiana University Mathematics Journal 1960 text pdf 10.1512/iumj.1960.9.59049 10.1512/iumj.1960.9.59049 en Indiana Univ. Math. J. 9 (1960) 783 - 812 state-of-the-art mathematics http://iumj.org/access/