Ian Gent is a professor and British computer scientist working in the area of Artificial Intelligence and specialising in the area of Constraint programming. He is a professor at the University of St Andrews. He (along with Toby Walsh) first wrote about the phase transition in many NP complete problems, in particular SAT. He was also one of the first researchers to investigate full generic methods to handle symmetry in constraint programming.
Ian Gent is the founder of recomputation.org, a group dedicated to reproducible experiments in computer science.
He was one of the founders of the csplib.org website, and popularised the Petrie Multiplier.