Mobius-Invariant Spaces and Algebras in Polydiscs H. Kaptanoglu Indiana University Mathematics Journal 1992 text pdf 10.1512/iumj.1992.41.41019 10.1512/iumj.1992.41.41019 en Indiana Univ. Math. J. 41 (1992) 339 - 362 state-of-the-art mathematics http://iumj.org/access/