Schauder Bases and Norm Ideals of Compact Operators II J. Holub Indiana University Mathematics Journal 1975 text pdf 10.1512/iumj.1975.24.24040 10.1512/iumj.1975.24.24040 en Indiana Univ. Math. J. 24 (1975) 555 - 564 state-of-the-art mathematics http://iumj.org/access/