LAUSR

This special issue in Algorithmica is dedicated to Professor Gregory Gutin on the occasion of his 60th birthday and in recognition of his outstanding contributions to Discrete Mathematics and Theoretical Computer Science. Gregory Gutin is currently Professor atDepartment of Computer Science, RoyalHolloway,University of London. Gregorywas born in 1957 inNovozybkov,Russia,whenhis parentswere undergraduate students studyingMathematics andPhysics.He receivedhisM.Sc. inMathematics in 1979 from Gomel State University, Belarus. After graduation, he had a number of different jobs in high schools and research institutes of Belarus. In 1990 he immigrated to Israel and started there his Ph.D. study under Professor Noga Alon at the School of Mathematics, Tel Aviv University, Israel. He received his Ph.D. with distinction in 1993. Between 1993 and 1996 he held visiting positions in the Department of Mathematics andComputer Science,OdenseUniversity,Denmark and then became a lecturer at the Department of Mathematics, Brunel University, UK. Since 2000, Gregory has worked at Royal Holloway. He is married and has three children and a grandchild. Professor Gregory Gutin is a world-leading researcher in Discrete Mathematics, Optimization and Theoretical Computer Science. He is particularly known for his outstanding contributions in Directed Graph Theory and Algorithms.