Locally Compact Spaces Associated with Abstract Convolutions W. Fairchild Indiana University Mathematics Journal 1971 text pdf 10.1512/iumj.1971.20.20036 10.1512/iumj.1971.20.20036 en Indiana Univ. Math. J. 20 (1971) 427 - 428 state-of-the-art mathematics http://iumj.org/access/