TY - CONF TI - Approximating derivative securities in f-algebras AU - Brown, D. J. AU - Huijsmans, Charles B. AU - de Pagter, Bernardus PY - 1991 SP - 171-177 PB - Springer-Verlag T2 - Positive operators, riesz spaces, and economics. Proceedings of a conference at Caltech, Pasadena, California, April 16-20, 1990. ER -