The paper appeared in Mathematical Programming and concerns extensions of the frighteningly effective KNITRO solver, now known as Artely KNITRO.

KNITRO’s main competitor in the continuous optimization arena is arguably the highly-successful open-source solver IPOPT by Andreas Wächter. IPOPT tops the list of most-cited papers in optimization in 2006, according to Google’s ranking.

Andreas is now faculty at Northwestern University, where I held a post-doctoral appointment at the time I co-authored the KNITRO paper.

As it happens, I currently share an office with Charles Audet, who also authors one of the most-cited papers that year.

At the time of this writing, Google only published the most-cited papers for 2006. Presumably, other years will follow.

SIAM just announced the publication of my book Iterative Solution of Symmetric Quasi-Definite Linear Systems in their Spotlights series, written with Mario Arioli.

The book is suitable for a graduate course on iterative methods for linear systems with applications to optimization and fluid dynamics.

We distribute software that implements the iterative methods discussed in the book in Matlab, Python and Julia.

In 2015 I taught an accelerated graduate-level course at the university of Louvain-la-Neuve (Belgium) describing optimization methods that lead to quasi-definite linear systems. The course material is available here.

Head to the SIAM Bookstore to get your copy of the book!

Update: here is a list of errata.