Saharon ShelahSaharon Shelah
- ) is an Israeli mathematician.
He is a professor of mathematics at the
Hebrew University of Jerusalem
and also at Rutgers University
in New Jersey, USA.
Shelah's main interest lies in mathematical logic, in particular
in model theory and set theory.
Shelah is one of the most prolific contemporary mathematicians.
As of 2003, he has (together with about 190 coauthors)
published more than 750 mathematical papers.
write something about his work: classification theory/stability
Whitehead problem. van der Waerden numbers.