Doc Dr. Eugene Fidelis was born on August 30, 1927 in Plonsk. By 1939, he completed six years of primary school. After the occupation he attended middle school and high school for adults in Plock while working at the district office, first as an office assistant, clerk later to finally come to the position of director of the office of law and administrative. In 1949 he entered the Faculty of Mathematics and Natural Sciences, the University of Warsaw. In 1952, he completed a bachelor's degree and took a job as an assistant at SGPiS, continuing the second degree in the field of applied probability. In 1954, obtained a master's degree in mathematics with a thesis on the application of statistics to examine the effectiveness of some drugs (partly published in Acta Biologica). In the meantime, he also worked as a lecturer at the Military Technical Academy (1954-1956). In December 1956, he joined the Institute of Mathematical Sciences in the group of statistical quality control (later Department of Applied Industrial Mathematics) at half-time, and from July 1957 to full-time. November 24, 1962 he defended his doctoral thesis in IM PAS "On join distribution of dichotomous random variables" under the supervision of prof. Jan Oderfeld. From 1 October 1965, he was appointed assistant professor in IM PAS, and from 1 January 1974 to associate professor. He worked in IM PAS until 1 July 2009. Eugene Fidelis died July 21st, 2014.