Citation | Béla Bollobás is one of the world s leading mathematicians in combinatorics. He has a huge published output, which includes major contributions to many different branches of this very large area, such as random graphs, percolation, extremal graphs and set systems, isoperimetric inequalities, and more. In addition, through his classic textbooks, he has more or less defined many of these subjects. Britain is now one of the strongest countries for probabilistic and extremal combinatorics in the world: this is almost entirely due to Bollobás s influence |