  Alan Baker, Fields Medallist, died on 4th February 2018 in Cambridge England
after a severe stroke a few days earlier.
  In 1970 he was awarded the Fields Medal at the International Congress in Nice
on the basis of his outstanding work on linear forms in logarithms and its
consequences. Since then he received many honours including the prestigious
Adams Prize of Cambridge University, the election to the Royal Society (1973)
and the Academia Europaea; and he was made an honorary fellow of University
College London, a foreign fellow of the Indian Academy of Science, a foreign
fellow of the National Academy of Sciences India, an honorary member of the
Hungarian Academy of Sciences, and a fellow of the American Mathematical
Society.
  In this article we survey Alan Baker's achievements.
