Bent Birkeland graduated from the University of Oslo in 1961 and has taught mathematics there ever since. His main mathematical interest is in analysis. He has published research papers on ordinary and partial differential equations. He also has lectured on the history of mathematics and has published a few notes in Norwegian on historical subjects, among them a booklet on ''Norwegian mathematicians.'' Ronald Calinger is a member of the history faculty at The Catholic University of America. His two most recent publications are Classics of Mathematics (1995) and Vita Mathematica (1996). He is working on a contextual history of classical mathematics.
Roger Cooke obtained the Ph.D. in mathematics at Princeton University in 1966 for a dissertation on multiple trigonometric series. Since 1968 he has been at the University of Vermont, and since 1980 his research interests have been primarily in the history of mathematics. He spent a sabbatical year in Russia in 1988-89, researching the archives of the Academy of Sciences for material on the Moscow school of analysts.
Niccolo Guicciardini was born in Florence in 1957. He holds a degree in physics and a degree in philosophy (both from the Universita degli Studi di Milano). He was awarded a Ph.D. by the Council for National Academic Awards (UK), defending a thesis written under the supervision of Ivor Grattan-Guinness (Middlesex Polytechnic). A revised version of his Ph.D. thesis was published as The Development of Newtonian Calculus in Britain, 1700-1800 (Cambridge Univ. Press, Cambridge, 1989). Presently, he is a ''ricercatore'' in the Department of Philosophy of the Universita `degli Studi di Bologna and is interested in the history of calculus and dynamics in the early 18th century.
Thomas Hochkirchen studied mathematics, computer science, and social sciences at the University of Wuppertal (Germany), where he graduated in mathematics. He did active research on the history of probability theory, e.g., on the works of Richard von Mises and Hilda Geiringer, the nearly forgotten contributions of Erhard Tornier and others. Currently working as a research assistant at the Mathematics Department of the University of Wuppertal, he is preparing his Ph.D. thesis on the history of axiomatization of probability theory.