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KTH / CSC / Teorigruppen / Jakob Nordström / Rekrytering

Rekrytering

Teorigruppen rekryterar forskare och studenter internationellt, och arbetsspråket i gruppen är engelska. Därför är också denna sida på engelska.

Postdoc Positions

I will soon be hiring postdocs in SAT solving or related areas with an intended starting date of August-September 2018. These are fully funded positions (including travel money) with an internationally competitive salary. A formal announcement with instructions how to apply should be published in November-December (you cannot apply by e-mail).

There will also be announcements for several postdoc positions in computational complexity theory during the autumn of 2017 with an intended starting date of August-September 2018.

Please feel free to drop me a line if you have any questions about this.

If you instead want to start collecting grants to list on your CV, you can also try to apply for an Individual Fellowship within the EU Marie Skłodowska-Curie actions program to come and do a postdoc with me. The last call for this program had a deadline of September 14, 2017 but there should be a new call out at some point. I would particularly welcome applications from strong candidates who want to work in proof complexity, SAT solving, or the intersection of these two areas. Please feel free to contact me if you want to discuss this.

PhD Positions

I would be interested in hiring a PhD student in SAT solving to work on algorithms for solving the Boolean satisfiability problem (SAT) very efficiently for large classes of instances, and on analyzing and understanding such algorithms. A formal announcement with instructions how to apply is likely to be published in November-December (you cannot apply by e-mail).

Also, together with Johan Håstad and Per Austrin I want to hire a PhD student in computational complexity theory. Again, a formal announcement with instructions how to apply is likely to be published in November-December.

All PhD positions in our group are fully funded positions with an internationally very competitive salary.

Master's Thesis Projects

I would be interested in supervising one or several Master's students for thesis work within the framework of the research project briefly outlined below. Please do not hesitate to send me an e-mail to get more detailed information. (Note, however, that these projects are intended for students registered at KTH or who are geographically close and can work on their thesis here at KTH. There is no separate funding available to support foreign students to come to Sweden.)

Formula Hardness and SAT Solving

Given a logic formula, is it possible to set its variables in such a way that the formula is satisfied? This simple looking problem has been on centre stage in theoretical computer science ever since the field got started some 40 years ago, and was recently named as one of the Millennium Prize Problems comprising some of the major challenges for all of mathematics in the 21st century. Today, students of computer science worldwide learn in their introductory theory courses that this so-called SAT problem is what is known as NP-complete, and therefore is very, very hard in practice.

Interestingly, practioners take a somewhat different view. During the last 10-15 years, SAT has developed from a problem of mainly theoretical interest into a practical approach for solving applied problems. Enormous progress in performance has led to satisfiability algorithms, so-called SAT solvers, becoming a standard tool for solving real-world problems with millions of variables in the context of, for example, hardware and software verification, electronic design automation, artificial intelligence, operations research, and bioinformatics. The theory of NP-completeness did not quite go away, however — for all these SAT solvers there are also known examples of tiny formulas with just a couple of hundred variables that make them fail miserably.

How can modern SAT solvers be so good in practice? How can one know for a particular formula whether it will be hard or easy? Can we extend SAT solvers with new methods of reasoning to make them potentially even more powerful than the best solvers today? These are the kind of questions we want to study in these Master's thesis projects, using a mix of theoretical research and practical experiments.

The projects are intended to give students a feel for what research in theoretical computer science is like, while at the same time focusing on concrete problems of practical importance. Apart from the Master's thesis itself, the intention is that the results will also be published as (parts of) papers in leading scientific conferences and/or journals in the field (in the framework of the research outlined here).

Sidansvarig: Jakob Nordström <jakobn~at-sign~kth~dot~se>
Uppdaterad 2017-11-16