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- Department of Physics Iran
University of Science and
Technology Narmak, Tehran,
(1995-2002), Associated Professor
- Sharif Univ.
of Technology, ( Since 2002), Associated Professor
- Institute for Studies
in Theoretical Physics and Mathematics (IPM), (1998-2001), Director of
the Complex System Group
- CNRS ( France-Nice ) ,
(Since 1999), Joint Researcher
- American Mathematical
Society, (Since 1998), Reviewer of Mathematical Review
- Associate Member of
ICTP (since 2003)
- Sharif Univ.
of Technology, ( Since 2007), Professor
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