(July 13, 1949, in Warsaw, Poland – May 30, 1985, in Nantes, France) was a Polish
computer scientist (habilitation in computer science), and an author of two books:
Combinatorics for Programmers (two editions) and (jointly with Wiktor Marek
Combinatorial analysis.
Jointly with his PhD student, Tomasz Imielinski, created
foundations of the theory of incomplete information in relational databases.