Jan Węglarz (born 1947 in Poznan) is a Polish computer scientist. He studied at University of Adam Mickiewicz[?] in Poznan, where he completed mathematics in 1969, and later on Poznan University of Technology, when he received title from automatics in 1971. He started work there since 1971. He received title of doctor in 1974, and habilitation in 1977. In 1988 he received title of professor. Member of Polish Acedemy of Science[?] (Polska Akademia Nauk, PAN), member-co-founder of Polish Computer Scince Association[?] (Polskie Towarzystwo Informatyczne, PTI), member of American Mathematical Society, Operations Research Society of America[?] and many, many others. Author of 12 monographs in Computer Science, Operation Research, Decision Theory, etc. Author of more than 200 articles. He discovered so called two-phase method, but unfortunately he published his discovery in a Polish newspapaper, so it was ignored. Western scientists received accolades instead. He refused many offers from the west and opted for his own research team in Poland. Received much too many prizes and decorations to list them all here, both in Poland and abroad.
He participated in the construction of Polish computers ELWRO[?].
By his pupils he is called John Carbon (exact translation from Polish into English) or Jaś Wędrowniczek (Johnny Walker, from his custom of walking during lectures). He is probably most liked and most popular teacher in Institute of Computer Science, with literaly hundreds anecdotes about him, sites dedicated entirely to him etc. His proud co-workers are said that they don't wash their hands when he happened to greet them.