I am a senior computational mathematician and part of the (Laboratory for Applied Mathematics, Numerical Software, and Statistics (LANS)) in the Mathematics and Computer Science Division at Argonne National Laboratory, and a Senior Fellow of the Computation Institute.
I am interested in the development of reliable methods for solving large-scale nonlinear optimization problems and in the implementation and analysis of filter type algorithms. This forms the basis from which I am extending nonlinear optimization methodologies to emerging areas such as mixed-integer nonlinear optimization and optimization problems with complementarity constraints.
Current Research Interests & Testproblem Libraries
Publications & Preprints
Software (under construction)
NEOS server the ubiquitous online source for optimization
Views-and-News the newsletter for the SIAM Activity Group on Optimization.
Student and Postdoc Opportunities:
Jon Lee and Sven Leyffer (Eds). Mixed Integer Nonlinear Programming, in The IMA Volumes in Mathematics and its Applications, Vol. 154, Springer, 2012.
Sven Leyffer (see my google calendar for busy times)
Mathematics and Computer Science Division
Argonne National Laboratory
Argonne, Il 60439, USA
E-mail: leyffer at anl.gov
Phone: (630) 252-4698; Fax: (630) 252-5986